diff --git a/_index.db b/_index.db index 434d89f8e..73c9b960b 100644 Binary files a/_index.db and b/_index.db differ diff --git a/data/en.wikipedia.org/wiki/107mm_M1938_mortar-0.md b/data/en.wikipedia.org/wiki/107mm_M1938_mortar-0.md new file mode 100644 index 000000000..260475056 --- /dev/null +++ b/data/en.wikipedia.org/wiki/107mm_M1938_mortar-0.md @@ -0,0 +1,38 @@ +--- +title: "107mm M1938 mortar" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/107mm_M1938_mortar" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:47.016121+00:00" +instance: "kb-cron" +--- + +The Soviet 107mm M1938 mortar was a scaled-down version of the 120mm M1938 mortar intended for use by mountain troops and light enough to be towed by animals on a cart. + + +== History == +In World War II, the 107mm mortar saw service with Soviet mountain infantry as a divisional artillery weapon. Weapons captured by the Germans were given the designation 10.7 cm Gebirgsgranatwerfer 328(r). Its last significant use in battle was in the Vietnam War. The ability to break down the weapon made it particularly suited to the rugged terrain of Vietnam. +The mortar fired a light HE round (OF-841) and a heavy HE round (OF-841A). The lighter HE round actually carried a larger bursting charge than the heavier HE round. Both rounds used GVMZ-series point detonation fuzes. +Recently, the weapon has been seen in use by rebel forces during the 2011 Libyan civil war. + + +== Users == + +and many others + + +== See also == + + +=== Weapons of comparable role, performance and era === +Ordnance ML 4.2 inch Mortar - British equivalent +M2 4.2 inch mortar - US equivalent + + +== Notes == + + +== External links == +OF-841 round +OF-841A round \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/1990_Chemical_Weapons_Accord-0.md b/data/en.wikipedia.org/wiki/1990_Chemical_Weapons_Accord-0.md new file mode 100644 index 000000000..d89e2a4e5 --- /dev/null +++ b/data/en.wikipedia.org/wiki/1990_Chemical_Weapons_Accord-0.md @@ -0,0 +1,32 @@ +--- +title: "1990 Chemical Weapons Accord" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/1990_Chemical_Weapons_Accord" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:48.272133+00:00" +instance: "kb-cron" +--- + +On June 1, 1990, Presidents George H. W. Bush and Mikhail Gorbachev signed the bilateral U.S.–Soviet Chemical Weapons Accord; officially known as the "Agreement on Destruction and Non-production of Chemical Weapons and on Measures to Facilitate the Multilateral Convention on Banning Chemical Weapons". This pact was signed during a summit meeting in Washington D.C. + + +== Criteria == +The bilateral agreement required the destruction to begin before 1993 and to reduce Chemical weapon (CW) stockpiles to no more than 5,000 agent tons each by December 31, 2002. It also required both sides to halt CW production upon entry into force of the accord. Additionally on-site inspections were authorized to confirm that destruction has taken place and data exchanges on stockpile levels would occur to facilitate monitoring. The Accord also included a mutual pledge to support a global ban on CW. + + +== See also == +Chemical warfare +Chemical Weapons Convention +List of chemical arms control agreements +Lethal Unitary Chemical Agents and Munitions +List of Soviet Union–United States summits +Novichok agent + + +== References == + + +== External links == +"Chemical Weapons WMD Around the World". {{cite journal}}: Cite journal requires |journal= (help) +"United States of America: Chemical Weapons Profile". {{cite journal}}: Cite journal requires |journal= (help) \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Albania_and_weapons_of_mass_destruction-0.md b/data/en.wikipedia.org/wiki/Albania_and_weapons_of_mass_destruction-0.md new file mode 100644 index 000000000..b081fbbf0 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Albania_and_weapons_of_mass_destruction-0.md @@ -0,0 +1,30 @@ +--- +title: "Albania and weapons of mass destruction" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Albania_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:49.488254+00:00" +instance: "kb-cron" +--- + +Albania once possessed a stockpile of weapons of mass destruction. This stockpile of chemical weapons included 16,678 kilograms (36,769 lb) of mustard gas, lewisite, adamsite, and phenacyl chloride (chloroacetophenone). +Albania was among the initial countries who signed the Chemical Weapons Convention (CWC) in 1993. The treaty, which came into force in 1997, requires the declaration of chemical stockpiles, and the destruction of all chemical weapons, delivery systems and production facilities. One of only six nations to declare a stockpile, Albania made its declaration in March 2003, after the discovery, in December 2002, of 600 bulk containers of chemicals in an abandoned bunker. The material was probably acquired by Communist leader Enver Hoxha in the mid-1970s from China although no documentation was found, therefore this is entirely speculative. + +On 11 July 2007, the Organisation for the Prohibition of Chemical Weapons (OPCW) confirmed the destruction of the entire chemical weapons stockpile in Albania, making Albania the first nation to completely destroy all of its chemical weapons under the terms of the CWC. Costs were approximately 48 million U.S. dollars. The United States assisted with and funded the destruction operations under the Nunn-Lugar Cooperative Threat Reduction. + + +== Biological and nuclear weapons == + + +=== Acquisition of the atomic bomb from the Sigurimi === +In the early 1960s, the Albanian intelligence services (Sigurimi), allegedly under the leadership of Kadri Hazbiu, engaged in clandestine activities. Reports suggest that during this period, there was an attempt to acquire sensitive military information, including the potential procurement of a secret atomic bomb. According to historical accounts, Dhimiter Gjoni, the resident operative in Italy, played a pivotal role as an intelligence representative for the Albanian authorities. Gjoni conveyed information indicating that through an agent codenamed 'Rampa,' efforts were made to obtain advanced military technology, including a remotely controlled anti-tank shell named 'Cobra'. +During these activities, 'Rampa' purportedly proposed a transaction, demanding a fee of $2000 for the acquisition of the anti-tank technology. Later, the head of Albanian intelligence, Dhimiter Gjoni based in Rome, reportedly shared information suggesting that 'Rampa' claimed to have the potential to obtain classified details regarding the atomic bomb. The price for this escalated to $6000, with 'Rampa' asserting a connection to an individual with access to such information at the Atomic Center of France." +Albania acceded to the Biological Weapons Convention on June 3, 1992, banning biological weapons. It also acceded to the Nuclear Non-Proliferation Treaty in September 1990. Albania joined the Geneva Protocol on 20 December 1989, banning chemical and biological weapons and deposited its accession to the Comprehensive Nuclear-Test-Ban Treaty on 23 April 2003. + + +== See also == +Cold War + + +== Notes and references == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Alexander_Zaitsev_(astronomer)-0.md b/data/en.wikipedia.org/wiki/Alexander_Zaitsev_(astronomer)-0.md new file mode 100644 index 000000000..5cef9dffd --- /dev/null +++ b/data/en.wikipedia.org/wiki/Alexander_Zaitsev_(astronomer)-0.md @@ -0,0 +1,41 @@ +--- +title: "Alexander Zaitsev (astronomer)" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Alexander_Zaitsev_(astronomer)" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:24.650269+00:00" +instance: "kb-cron" +--- + +Aleksandr Leonidovich Zaitsev (Russian: Александр Леонидович Зайцев; 19 May 1945 – 29 November 2021) was a Russian and Soviet radio engineer and astronomer from Fryazino. He worked on radar astronomy devices, near-Earth asteroid radar research, and SETI. + + +== Education == +Zaitsev received his M.Sc. degree in radio engineering from the Moscow Mining University in 1967 and his Ph.D. (1981) and his postdoctoral lecture qualification (1997) in radar astronomy from the Institute of Radio Engineering and Electronics, Russian Academy of Science in Moscow. He was a member of the Space Guard Foundation, the SETI League, and The European Radio Astronomy Club (E.R.A.C.). + + +== Career == +Zaitsev was the chief scientist at the Russian Academy of Science's Institute of Radio Engineering and Electronics. He headed the group transmitting Team Encounter's interstellar messages using the Yevpatoria (Evpatoria) Deep Space Center (EDSC). Zaitsev was also serving as the SETI League's Regional Coordinator for Russia. +Zaitsev's career has focused on three main topics: the theory, the design and implementation of radar devices used in the study of Venus, Mars, and Mercury; near-Earth asteroid radar research; and interstellar radio messaging, his later field of research. He retired in 2013. +Zaitsev observed the asteroid 4179 Toutatis in December 1992 using the 70-m Yevpatorian Planetary Radar in Crimea (Ukraine), as a sounding signal transmitter, and the 100-m radio telescope in Effelsberg, Germany, as a receiver of the asteroid's radar echo. +In June 1995, Zaitsev was responsible for initiating the world's first intercontinental radar astronomy experiment; the radar groups participating in this experiment were led by Steven Ostro at JPL, Zaitsev in Yevpatoria, and Yasuhiro Koyama in Kashima, Japan. Ostro's group transmitted and received using the Goldstone site of the Deep Space Network, while Zaitsev received using the Yevpatoria site and Koyama's group received at Kashima. The target asteroid, 6489 Golevka, was later named for the participating observatories (GOL-EV-KA or GOLdstone-EVpatoria-KAshima). Zaitsev has also conducted work on using radar to determine the composition of asteroids and planetary bodies. +Zaitsev supervised the transmission of the 1999 and 2003 Cosmic Calls from Yevpatoria Planetary Radar (EPR). Under his leadership, a youth group in Moscow composed and broadcast a 'Teen Age Message to ETI'. Zaitsev proposed three-section structure of interstellar radio messages, coined the acronym METI (Messaging to Extra-Terrestrial Intelligence) and the phrase 'SETI paradox', which refers to an apparent "paradox" where two distant civilizations capable of interstellar communication will always remain silent unless one of them contacts the other first, resulting in a deadlock of silence. In 2005, in article "The Drake Equation: Adding a METI Factor" he suggested that a high technology is not enough for establishing contact with Aliens because appropriate behavior directed to practical realization of sending signals is necessary too. +In 2006–2011, Zaitsev was one of the contributors to the + +ARTE's German-French TV documentation "Die Außerirdischen" ("Calling All Aliens") by Christian Schidlowski; +Russian documentary "Overcome the Great Silence" by Vladislav Sidorov, +Dutch documentary "Calling E.T." by Prosper de Roos, +Dutch documentary "Alien Bits" by Prosper de Roos. +Zaitsev died on 29 November 2021. + + +== Awards == +1985, USSR State Prize in Science. +1989, the Koroliov Medal of the Soviet Space Federation. +In 1995, 6075 Zajtsev, an asteroid in the outer regions of the main-belt, was named in his honour by the discovering astronomer, Nikolai Chernykh, following a suggestion by the Institute of Theoretical Astronomy. +1997, the Tsiolkovsky Medal of the Russian Space Federation. +2003, Ukrainian jubilee medal 2500th Anniversary of Evpatoria. + + +== References == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Bulgaria_and_weapons_of_mass_destruction-0.md b/data/en.wikipedia.org/wiki/Bulgaria_and_weapons_of_mass_destruction-0.md new file mode 100644 index 000000000..0239b76a0 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Bulgaria_and_weapons_of_mass_destruction-0.md @@ -0,0 +1,45 @@ +--- +title: "Bulgaria and weapons of mass destruction" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Bulgaria_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:50.681166+00:00" +instance: "kb-cron" +--- + +Bulgaria has developed weapons of mass destruction, most notably chemical weapons. Chemical weapons production was concentrated in Smyadovo. As of 2025, Bulgaria does not possess any weapons of mass destruction. + + +== Missile program == +The People's Republic of Bulgaria had a significant missile arsenal, including 67 Scud (Elbrus), 50 Frog (Luna) and 24 Spider (Oka) ballistic missiles. Since the Soviet Union planned to rapidly deploy its own nuclear weapons in Bulgaria in case a war broke out, the missiles were not armed with warheads, but only prepared to launch Soviet weapons. +The SS-23 systems had conventional warheads plus a WMD launching capability. The nuclear missile launching pads and equipment were dismantled in 1991. The first missile brigade was created in 1961. In 1994, the country bought 46 conventional warheads for its Scuds from Russia. All Scud, Frog and Spider missiles were destroyed in 2002. Currently, Bulgaria operates a dozen Scarab launchers, but information over the exact number of missiles is classified. They are all armed with conventional warheads of 160 kg each. + + +== Chemical weapons == +Information on Bulgaria's chemical weapons is scarce. The only known chemical weapons production facility was located near Smyadovo, which now produces chemicals for civilian purposes. The country ratified the Chemical Weapons Convention in 1994 and begun dismantlement in 2000. + + +== Biological weapons == +Bulgaria has signed and ratified the Biological Weapons Convention. + + +== Nuclear weapons == +Bulgaria has never developed nuclear weapons, although some treaties with the Soviet Union guaranteed the deployment of Soviet warheads on Bulgarian territory in case of a war with NATO. Its R-400 missiles were nuclear-capable. In the mid-1990s, journalist Goran Gotev investigated a testimony of an anonymous Soviet Army captain published in Komsomolskaya Pravda, who described in detail an alleged Soviet-Bulgarian nuclear weapons facility which hosted 70 warheads for tactical missiles. The site consisted of "four three-storey apartment blocks, barracks, a cafeteria, a sports field, a social club, a store, and a plaza", and had 130 personnel. The unit was disbanded in 1989, the warheads were quickly shipped to Ukraine and all equipment, uniforms and photos that were present at the facility were destroyed. Another Russian Army official later denied the story. However, in the 1980s four Bulgarian Air Force majors received training in the Soviet Union on releasing nuclear weapons from MiG-23BN aircraft. +In 2001, the Bulgarian Foreign Ministry denied the "presence" of nuclear weapons in Bulgaria. +The country has the potential to establish a military nuclear program, having a nuclear powerplant at Kozloduy with its own plutonium storage facility. A nuclear research facility with a 200 kW pool-type reactor is in operation in Sofia. The reactor of the facility produces some nuclear material, which is stored near Novi Khan. +As part of its efforts to safeguard potentially weapons-usable atomic material, the United Nations nuclear watchdog assisted Bulgaria with the removal of highly enriched uranium stored at the shut-down research reactor in Sofia. The substance, which was 36% enriched and took the form of fresh fuel, was airlifted in December 2003 to Russia, the original supplier, according to the International Atomic Energy Agency (IAEA). Agency safeguards inspectors monitored and verified the packaging of the fuel, which Russia said it would re-fabricate into low-enriched uranium. +In December 2016, Bulgaria voted against a UN Resolution that urged member states to begin negotiations on the complete abolition of nuclear weapons. +In April 2018, information appeared about Turkey's desire to remove US nuclear weapons from the territory of the country. After NATO's official statements about the desire to expand the military presence of the United States in Europe, it became known that Bulgaria could become a new location for nuclear weapons from Turkey. + + +== See also == +Military of Bulgaria + + +== References == + + +== External links == +Satellite images of an alleged nuclear facility +Act on the Prohibition of Chemical Weapons and on Control of Toxic Chemicals and the Precursors thereof, a 2002 act banning the production and storage of nuclear weapons in Bulgaria \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Dan_Werthimer-0.md b/data/en.wikipedia.org/wiki/Dan_Werthimer-0.md new file mode 100644 index 000000000..9dcbb8922 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Dan_Werthimer-0.md @@ -0,0 +1,22 @@ +--- +title: "Dan Werthimer" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Dan_Werthimer" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:22.130799+00:00" +instance: "kb-cron" +--- + +Dan Werthimer is co-founder and chief scientist of the SETI@home project and directs other UC Berkeley SETI searches at radio, infrared and visible wavelengths, including the Search for Extra-Terrestrial Radio Emissions from Nearby Developed Intelligent Populations (SERENDIP). He is also the principal investigator for the worldwide Collaboration for Astronomy Signal Processing and Electronics Research (CASPER). +Werthimer was associate professor in the engineering and physics departments of San Francisco State University and a visiting professor at Beijing Normal University, the University of St. Charles in Marseille, Eotvos University in Budapest. His father, Jerrold Werthimer, was Professor of Journalism at San Francisco State University for many years. +Werthimer has taught courses at universities in Peru, Egypt, Ghana, Ethiopia, Zimbabwe, Uganda and Kenya. He has published numerous papers in the fields of SETI, radio astronomy, instrumentation and science education; he is co-author of "SETI 2020" and editor of "Astronomical and Biochemical Origins and the Search for Life in the Universe". He received the prestigious Frank Drake Prize of the SETI Institute in 2021. + + +== References == + + +== External links == +Berkeley SETI Website +seti@home Website +Collaboration for Astronomy Signal Processing and Electronics Research Website \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Daniel_O'Donovan_(Irish_republican)-0.md b/data/en.wikipedia.org/wiki/Daniel_O'Donovan_(Irish_republican)-0.md new file mode 100644 index 000000000..86b3b57a4 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Daniel_O'Donovan_(Irish_republican)-0.md @@ -0,0 +1,37 @@ +--- +title: "Daniel O'Donovan (Irish republican)" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Daniel_O'Donovan_(Irish_republican)" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:03.422463+00:00" +instance: "kb-cron" +--- + +Daniel "Sandow" O'Donovan (1890, in Cork (city) – 31 July 1975, in Mallow, County Cork, Ireland), was a leading member of the Irish Republican Army during the Irish War of Independence. + + +== Early life == +Dan O'Donovan was an early recruit to the Irish Volunteers and paraded with the Cork Volunteers at the funeral of Jeremiah O'Donovan Rossa at Glasnevin Cemetery, Dublin, in 1915, at which Patrick Pearse gave his famous oration ending with "Ireland unfree shall never be at peace". + + +== War of Independence == +He was later a prominent officer of Cork's No. 1 Brigade of the Irish Republican Army during the Irish War of Independence. On 3 September 1917 he led a successful raid for arms at Cork Grammar School, a school for the children of the Anglo-Irish gentry, which maintained its own armoury for training potential British Army officers. O'Donovan acquired the nickname "Sandow" around this time because of his resemblance to famous German bodybuilder Eugen Sandow. +O'Donovan led or participated in many daring raids against British forces in County Cork, including the capture of Blarney's Royal Irish Constabulary barracks on 1 June 1920. O'Donovan was also in command of the six-man IRA unit that carried out the assassination of RIC District Inspector Gerald Bryce Ferguson Smyth at the Cork and County social club on the evening of 17 July 1920. Some weeks earlier Smyth had gained notoriety when RIC Constables in Listowel, County Kerry mutinied rather than listen to his orders to "shoot to kill" all persons who were suspected of Irish republicanism. For this reason, O'Donovan is alleged to have called out before the hit team opened fire, "Colonel, were not your orders to shoot on sight? Well you are in sight now, so prepare." According to historians Tom Mahon and James Gillogly, "Smyth was the most senior police officer killed in the conflict." +Under the command of Seán O'Hegarty, O'Donovan and others organised the Coolavokig Ambush near Macroom in February 1921. He was also involved in the seizure of a large cache of guns and ammunition from the British Royal Navy tender, Upnor, off the coast of County Cork, after first commandeering a smaller vessel at Queenstown. According to historians Tom Mahon and James Gillogly, "The IRA operatives seized so much arms and ammunition that they're reported to have needed 200 lorries to cart it all away." + + +== Civil War == +After the signing of the Anglo-Irish Treaty of 1921, O'Donovan took the anti-treaty side in the Irish Civil War. He was involved in an attack on Royal Navy personnel at the Treaty Port at Spike Island, County Cork, this time using IRA men dressed in Irish Army uniforms in an attempt to start a war between the Irish Free State and the British Empire. Both Governments, however, realized almost immediately who had really carried out the attack. As a result, a reward of £10,000 was offered for information leading to the capture of O'Donovan and five other named republicans. +On 22 August 1922, O'Donovan chaired a meeting of surviving IRA officers in Long's Bar (The Diamond), Béal na Bláth, County Cork. Present were senior national figures including Liam Deasy, Tom Barry and Éamon de Valera. Later the same day General Michael Collins, Commander-in-Chief of the Irish Army and Chairman of the Provisional Government of the Irish Free State was killed by a sniper in an ambush a half mile away. + + +== Post-war years == +During the aftermath of the Civil War, in return for badly needed funding, the IRA's intelligence arm covertly acquired classified information in both Great Britain and the United States of America, which was then sold to the Soviet Union. The IRA's main spymaster in America during this era was based in New York City and is referred to only as "Mr. Jones" in recently decrypted IRA messages from the era. After careful research, historians Tom Mahon and James J. Gillogly have identified "Mr. Jones" as O'Donovan. According to both historians, while living in America, O'Donovan covertly acquired and sold to the Soviet Union's military intelligence service, the GRU, "reports of the army’s chemical weapons service, state-of-the-art gas masks, machine-gun and aeroplane engine specifications, and reports from the navy, air service and army". +Also according to Mahon and Gillogly, "Mr. Jones" was also involved in efforts to acquire the ability to build chemical weapons for both the GRU and for the IRA, which hoped to use mustard gas against the military and police forces of the Irish Free State. The Soviet Union was more successful than the IRA in using O'Donovan's information to manufacture chemical weapons and Red Army Marshal of the Soviet Union Mikhail Tukhachevsky was a pioneer in the use of poison gas against peasant uprisings. Despite this, historians Tom Mahon and James J. Gillogly have praised O'Donovan as, "A true Irish James Bond!" +In later years O'Donovan worked with the Irish Sugar Company in North Cork where he managed Ballybeg Quarry, near Buttevant, which the company owned. +Dan "Sandow" O'Donovan died in 1975 and was interred in a family plot at St. Finbarr's Cemetery, Cork City. +O'Donovan is often erroneously referred in history books of the period as "Donovan". + + +== References == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test-0.md b/data/en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test-0.md new file mode 100644 index 000000000..f81e54203 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test-0.md @@ -0,0 +1,36 @@ +--- +title: "Double Asteroid Redirection Test" +chunk: 1/4 +source: "https://en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:30.467091+00:00" +instance: "kb-cron" +--- + +The Double Asteroid Redirection Test (DART) was a NASA space mission to test a method of planetary defense against near-Earth objects (NEOs). It was designed to assess how much a spacecraft impact can deflect an asteroid by hitting it head-on. The target asteroid, Dimorphos, is a 525 feet (160 m) wide moonlet of the asteroid Didymos; neither asteroid poses an impact threat to Earth, but their joint characteristics made them an ideal target. +Launched on 24 November 2021, the DART spacecraft collided with Dimorphos at 14,000 mph (23,000 km/h) on 26 September 2022 about 6.8 million miles (10.9 million kilometers) from Earth. The collision shortened Dimorphos's orbit around Didymos by 32 minutes, greatly in excess of the pre-defined success threshold of 73 seconds. Deflection resulted from the ejection of debris which caused a recoil that was substantially larger than the impact itself. The collision also very slightly increased the asteroid pair's orbital speed around the Sun—an effect directly relevant to the goal of planetary protection by changing an object's path through space. +DART was a joint project between NASA and the Johns Hopkins University Applied Physics Laboratory. The project was funded through NASA's Planetary Defense Coordination Office, managed by NASA's Planetary Missions Program Office at the Marshall Space Flight Center, and several NASA laboratories and offices provided technical support. The Italian Space Agency contributed LICIACube, a CubeSat which photographed the impact event, and other international partners, such as the European Space Agency (ESA), and Japan Aerospace Exploration Agency (JAXA), are contributing to related or subsequent projects. + +== Mission history == +NASA and the European Space Agency (ESA) started with individual plans for missions to test asteroid deflection strategies, but by 2015, they struck a collaboration called AIDA (Asteroid Impact and Deflection Assessment) involving two separate spacecraft launches that would work in synergy. Under that proposal, the European Asteroid Impact Mission (AIM), would have launched in December 2020, and DART in July 2021. AIM would have orbited the larger asteroid to study its composition and that of its moon. DART would then kinetically impact the asteroid's moon on 26 September 2022, during a close approach to Earth. +The AIM orbiter was however canceled, then replaced by Hera which plans to start observing the asteroid four years after the DART impact. Live monitoring of the DART impact thus had to be obtained from ground-based telescopes and radar. +In June 2017, NASA approved a move from concept development to the preliminary design phase, and in August 2018 the start of the final design and assembly phase of the mission. On 11 April 2019, NASA announced that a SpaceX Falcon 9 would be used to launch DART. +Satellite impact on a small Solar System body had already been implemented once, by NASA's 372-kilogram (820 lb) Deep Impact space probe's impactor spacecraft and for a completely different purpose (analysis of the structure and composition of a comet). On impact, Deep Impact released 19 gigajoules of energy (the equivalent of 4.8 tons of TNT), and excavated a crater up to 150 metres (490 ft) wide. + +== Description == + +=== Spacecraft === +The DART spacecraft was an impactor with a mass of 610 kilograms (1,340 lb) that hosted no scientific payload and had sensors only for navigation. The spacecraft cost US$330 million by the time it collided with Dimorphos in 2022. + +==== Camera ==== + +DART's navigation sensors included a Sun sensor, a star tracker called SMART Nav software (Small-body Maneuvering Autonomous Real Time Navigation), and a 20-centimetre (7.9 in) aperture camera called Didymos Reconnaissance and Asteroid Camera for Optical navigation (DRACO). DRACO was based on the Long Range Reconnaissance Imager (LORRI) onboard New Horizons spacecraft, and supported autonomous navigation to impact the asteroid's moon at its center. The optical part of DRACO was a Ritchey-Chrétien telescope with a field of view of 0.29° and a focal length of 2.6208 m (f/12.60). The spatial resolution of the images taken immediately before the impact was around 20 centimeters per pixel. The instrument had a mass of 8.66 kilograms (19.1 lb). +The detector used in the camera was a CMOS image sensor measuring 2,560 × 2,160 pixels. The detector records the wavelength range from 0.4 to 1 micron (visible and near infrared). A commercial off-the-shelf CMOS detector was used instead of a custom charge-coupled device in LORRI. DRACO's detector performance actually met or exceeded that of LORRI because of the improvements in sensor technology in the decade separating the design of LORRI and DRACO. Fed into an onboard computer with software descended from anti-missile technology, the DRACO images helped DART autonomously guide itself to its crash. + +==== Solar arrays ==== + +Using ROSA as the structure, a small portion of the DART solar array was configured to demonstrate Transformational Solar Array technology, which has very-high-efficiency SolAero Inverted Metamorphic (IMM) solar cells and reflective concentrators providing three times more power than other available solar array technology. + +==== Antenna ==== +The DART spacecraft was the first spacecraft to use a new type of high-gain communication antenna, a Spiral Radial Line Slot Array (RLSA). The circularly-polarized antenna operated at the (microwave) X-band NASA Deep Space Network (NASA DSN) frequencies of 7.2 and 8.4 GHz, and had a gain of 29.8 dBi on downlink and 23.6 dBi on uplink. The fabricated antenna in a flat and compact shape exceeded the given requirements and was tested through environments resulting in a TRL-6 design. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test-1.md b/data/en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test-1.md new file mode 100644 index 000000000..35937dc95 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test-1.md @@ -0,0 +1,36 @@ +--- +title: "Double Asteroid Redirection Test" +chunk: 2/4 +source: "https://en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:30.467091+00:00" +instance: "kb-cron" +--- + +==== Ion thruster ==== +DART demonstrated the NEXT gridded ion thruster, a type of solar electric propulsion. It was powered by 22-square-metre (240 sq ft) solar arrays to generate the approximately 3.5 kW needed to power the NASA Evolutionary Xenon Thruster–Commercial (NEXT-C) engine. Early tests of the ion thruster revealed a reset mode that induced higher current (100 A) in the spacecraft structure than expected (25 A). It was decided not to use the ion thruster further as the mission could be accomplished without it, using conventional thrusters fueled by the 50 kilograms (110 lb) of hydrazine onboard. However, the ion thrusters remained available if needed to deal with contingencies, and had DART missed its target, the ion system could have returned DART to Dimorphos two years later. + +=== Secondary spacecraft === + +The Italian Space Agency (ASI) contributed a secondary spacecraft called LICIACube (Light Italian CubeSat for Imaging of Asteroids), a small CubeSat that piggybacked with DART and separated on 11 September 2022, 15 days before impact. It acquired images of the impact and ejecta as it drifted past the asteroid. LICIACube communicated directly with Earth, sending back images of the ejecta after the Dimorphos flyby. LICIACube is equipped with two optical cameras, dubbed LUKE and LEIA. + +=== Effect of the impact on Dimorphos and Didymos === + +The spacecraft hit Dimorphos in the direction opposite to the asteroid's motion. Following the impact, the instantaneous orbital speed of Dimorphos therefore dropped slightly, which reduced the radius of its orbit around Didymos. The trajectory of Didymos was also modified, but in inverse proportion to the ratio of its mass to the much lower mass of Dimorphos and therefore not much. The actual velocity change and orbital shift depended on the topography and composition of the surface, among other things. The contribution of the recoil momentum from the impact ejecta produces a poorly predictable "momentum enhancement" effect. Before the impact, the momentum transferred by DART to the largest remaining fragment of the asteroid was estimated as up to 3–5 times the incident momentum, depending on how much and how fast material would be ejected from the impact crater. Obtaining accurate measurements of that effect was one of the mission's main goals and will help refine models of future impacts on asteroids. +Scientists later determined that the impact also slightly changed the orbit of the asteroid pair around the Sun--the first time human action measurably had such an effect on a celestial body. The orbital speed increased by about two inches an hour from the pre-impact speed of 76,000 miles per hour (122,000 km/h). Amateur astronomers in several countries contributed data by precisely measuring the pair's occultation of background stars along their orbit after impact. Scientists also used radio telescope data about the pair obtained before and after impact. According to a study author, even such a tiny orbital change might prevent a catastrophic asteroid collision with Earth. +The DART impact excavated surface/subsurface materials of Dimorphos, leading to the formation of a crater and/or some magnitude of reshaping (i.e., shape change without significant mass loss). Some of the ejecta may eventually hit Didymos's surface. If the kinetic energy delivered to its surface was high enough, reshaping may have also occurred in Didymos, given its near-rotational-breakup spin rate. Reshaping on either body would have modified their mutual gravitational field, leading to a reshaping-induced orbital period change, in addition to the impact-induced orbital period change. If left unaccounted for, this could later have led to an erroneous interpretation of the effect of the kinetic deflection technique. + +=== Observations of the impact === + +DART's companion LICIACube, the Hubble Space Telescope, James Webb Space Telescope, and the Earth-based ATLAS observatory all detected the ejecta plume from the DART impact. On September 26, SOAR observed the visible impact trail to be over 10,000 kilometres (0.026 LD; 6,200 mi) long. Initial estimates of the change in binary orbit period were expected within a week and with the data released by LICIACube. DART's mission science depends on careful Earth-based monitoring of the orbit of Dimorphos over the subsequent days and months. Dimorphos was too small and too close to Didymos for almost any observer to see directly, but its orbital geometry is such that it transits Didymos once each orbit and then passes behind it half an orbit later. Any observer that can detect the Didymos system therefore sees the system dim and brighten again as the two bodies cross. +The impact was planned for a moment when the distance between Didymos and Earth is at a minimum, permitting many telescopes to make observations from many locations. The asteroid was near opposition and visible high in the night sky well into 2023. The change in Dimorphos's orbit around Didymos was detected by optical telescopes watching mutual eclipses of the two bodies through photometry on the Dimorphos-Didymos pair. In addition to radar observations, they confirmed that the impact shortened Dimorphos's orbital period by 32 minutes. Based on the shortened binary orbital period, the instantaneous reduction in Dimorphos's velocity component along its orbital track was determined, which indicated that substantially more momentum was transferred to Dimorphos from the escaping impact ejecta than from the impact itself. In this way, the DART kinetic impact was highly effective in deflecting Dimorphos. + +=== Follow-up mission === +In a collaborating project, the European Space Agency has developed Hera, a spacecraft that was launched to Didymos in October 2024 and planned to arrive in 2026 to do a detailed reconnaissance and assessment. Hera carries two CubeSats, Milani and Juventas. + +=== AIDA mission architecture === + +== Mission profile == + +=== Target asteroid === \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test-2.md b/data/en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test-2.md new file mode 100644 index 000000000..ff28b9dd0 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test-2.md @@ -0,0 +1,28 @@ +--- +title: "Double Asteroid Redirection Test" +chunk: 3/4 +source: "https://en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:30.467091+00:00" +instance: "kb-cron" +--- + +The mission's target was Dimorphos in 65803 Didymos system, a binary asteroid system in which one asteroid is orbited by a smaller one. The primary asteroid (Didymos A) is about 780 metres (2,560 ft) in diameter; the asteroid moon Dimorphos (Didymos B) is about 160 metres (520 ft) in diameter in an orbit about 1 kilometre (0.62 mi) from the primary. The mass of the Didymos system is estimated at 528 billion kg, with Dimorphos comprising 4.8 billion kg of that total. Choosing a binary asteroid system is advantageous because changes to Dimorphos's velocity can be measured by observing when Dimorphos subsequently passes in front of its companion, causing a dip in light that can be seen by Earth telescopes. Dimorphos was also chosen due to its appropriate size; it is in the size range of asteroids that one would want to deflect, were they on a collision course with Earth. In addition, the binary system was relatively close to the Earth in 2022, at about 7 million miles (0.075 astronomical units; 29 lunar distances; 11 million kilometers). The Didymos system is not an Earth-crossing asteroid, and there is no possibility that the deflection experiment could create an impact hazard. On 4 October 2022, Didymos made an Earth approach of 10.6 million kilometres (0.071 astronomical units; 28 lunar distances; 6.6 million miles). + +=== Preflight preparations === + +Launch preparations for DART began on 20 October 2021, as the spacecraft began fueling at Vandenberg Space Force Base (VSFB) in California. The spacecraft arrived at Vandenberg in early October 2021 after a cross-country drive. DART team members prepared the spacecraft for flight, testing the spacecraft's mechanisms and electrical system, wrapping the final parts in multilayer insulation blankets and practicing the launch sequence from both the launch site and the mission operations center at APL. DART headed to the SpaceX Payload Processing Facility on VSFB on 26 October 2021. Two days later, the team received the green light to fill DART's fuel tank with roughly 50 kilograms (110 lb) of hydrazine propellant for spacecraft maneuvers and attitude control. DART also carried about 60 kilograms (130 lb) of xenon for the NEXT-C ion engine. Engineers loaded the xenon before the spacecraft left APL in early October 2021. +Starting on 10 November 2021, engineers mated the spacecraft to the adapter that stacks on top of the SpaceX Falcon 9 launch vehicle. The Falcon 9 rocket without the payload fairing rolled for a static fire and later came back to the processing facility again where technicians with SpaceX installed the two halves of the fairing around the spacecraft over the course of two days, 16 and 17 November, inside the SpaceX Payload Processing Facility at Vandenberg Space Force Base and the ground teams completed a successful Flight Readiness Review later that week with the fairing then attached to the rocket. +A day before launch, the launch vehicle rolled out of the hangar and onto the launch pad at Vandenberg Space Launch Complex 4 (SLC-4E); from there, it lifted off to begin DART's journey to the Didymos system and it propelled the spacecraft into space. + +=== Launch === + +The DART spacecraft was launched on 24 November 2021, at 06:21:02 UTC. +Early planning suggested that DART was to be deployed into a high-altitude, high-eccentricity Earth orbit designed to avoid the Moon. In such a scenario, DART would use its low-thrust, high-efficiency NEXT ion engine to slowly escape from its high Earth orbit to a slightly inclined near-Earth solar orbit, from which it would maneuver onto a collision trajectory with its target. But because DART was launched as a dedicated Falcon 9 mission, the payload along with Falcon 9's second stage was placed directly on an Earth escape trajectory and into heliocentric orbit when the second stage reignited for a second engine startup or escape burn. Thus, although DART carries a first-of-its-kind electric thruster and plenty of xenon fuel, Falcon 9 did almost all of the work, leaving the spacecraft to perform only a few trajectory-correction burns with simple chemical thrusters as it homed in on Didymos's moon Dimorphos. + +=== Transit === + +The transit phase before impact lasted about 9 months. During its interplanetary travel, the DART spacecraft made a distant flyby of the 578-metre (1,896-foot) diameter near-Earth asteroid (138971) 2001 CB21 in March 2022. DART passed 0.117 astronomical units (46 lunar distances; 17.5 million kilometres; 10.9 million miles) from 2001 CB21 in its closest approach on 2 March 2022. +DART's DRACO camera opened its aperture door and took its first light image of some stars on 7 December 2021, when it was 2 million miles (0.022 astronomical units; 8.4 lunar distances; 3.2 million kilometres) away from Earth. The stars in DRACO's first light image were used as calibration for the camera's pointing before it could be used to image other targets. On 10 December 2021, DRACO imaged the open cluster Messier 38 for further optical and photometric calibration. +On 27 May 2022, DART observed the bright star Vega with DRACO to test the camera's optics with scattered light. On 1 July and 2 August 2022, DART's DRACO imager observed Jupiter and its moon Europa emerging from behind the planet, as a performance test for the SMART Nav tracking system to prepare for the Dimorphos impact. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test-3.md b/data/en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test-3.md new file mode 100644 index 000000000..fac9845ad --- /dev/null +++ b/data/en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test-3.md @@ -0,0 +1,45 @@ +--- +title: "Double Asteroid Redirection Test" +chunk: 4/4 +source: "https://en.wikipedia.org/wiki/Double_Asteroid_Redirection_Test" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:30.467091+00:00" +instance: "kb-cron" +--- + +=== Course of the impact === +Two months before the impact, on 27 July 2022, the DRACO camera detected the Didymos system from approximately 32 million kilometres (0.21 astronomical units; 83 lunar distances; 20 million miles) away and started refining its trajectory. The LICIACube nanosatellite was released on 11 September 2022, 15 days before the impact. Four hours before impact, some 90,000 kilometres (0.23 LD; 56,000 mi) away, DART began to operate in complete autonomy under control of its SMART Nav guidance system. Three hours before impact, DART performed an inventory of objects near the target. Ninety minutes before the collision, when DART was 38,000 kilometres (0.099 LD; 24,000 mi) away from Dimorphos, the final trajectory was established. When DART was 24,000 kilometres (0.062 LD; 15,000 mi) away Dimorphos became discernible (1.4 pixels) through the DRACO camera which then continued to capture images of the asteroid's surface and transmit them in real-time. +DRACO was the only instrument able to provide a detailed view of Dimorphos's surface. The use of DART's thrusters caused vibrations throughout the spacecraft and solar panels, resulting in blurred images. To ensure sharp images, the last trajectory correction was executed 4 minutes before impact and the thrusters were deactivated afterwards. + +The last full image, transmitted two seconds before impact, has a spatial resolution of about 3 centimeters per pixel. The impact took place on 26 September 2022, at 23:14 UTC. +The head-on impact of the 500 kilograms (1,100 lb) DART spacecraft at 6.6 kilometres per second (4.1 mi/s) or 22,530 kilometres per hour (14,000 mph) likely imparted an energy of about 11 gigajoules, the equivalent of about three tonnes of TNT, and was expected to reduce the orbital velocity of Dimorphos between 1.75 cm/s and 2.54 cm/s, depending on numerous factors such as material porosity. The reduction in Dimorphos's orbital velocity brings it closer to Didymos, resulting in the moon experiencing greater gravitational acceleration and thus a shorter orbital period. The orbital period reduction from the head-on impact serves to facilitate ground-based observations of Dimorphos. An impact to the asteroid's trailing side would instead increase its orbital period towards 12 hours and make it coincide with Earth's day and night cycle, which would limit any single ground-based telescope from observing all orbital phases of Dimorphos nightly. + +The measured momentum enhancement factor (called beta) of DART's impact of Dimorphos was 3.6, which means that the impact transferred roughly 3.6 times greater momentum than if the asteroid had simply absorbed the spacecraft and produced no ejecta at all – indicating the ejecta contributed more to moving the asteroid than the spacecraft did. This means one could use either a smaller impactor or shorter lead times to produce a certain deflection in an asteroid than previously expected. The value of beta depends on various factors, composition, density, porosity, etc. The goal is to use these results and modeling to infer what beta could be for another asteroid by observing its surface and possibly measuring its bulk density. Scientists estimate that DART's impact displaced over 1,000,000 kilograms (2,200,000 lb) of dusty ejecta into space – enough to fill six or seven rail cars. The tail of ejecta from Dimorphos created by the DART impact is at least 30,000 kilometres (0.078 LD; 19,000 mi) long with a mass of at least 1,000 tonnes (980 long tons; 1,100 short tons), and possibly up to 10 times that much. + +The DART impact on the center of Dimorphos decreased the orbital period, previously 11 hours and 52 minutes, by 33±1 minutes. This large change indicates the recoil from material excavated from the asteroid and ejected into space by the impact (known as ejecta) contributed significant momentum change to the asteroid, beyond that of the DART spacecraft itself. Researchers found the impact caused an instantaneous slowing in Dimorphos's speed along its orbit of about 2.7 millimeters per second — again indicating the recoil from ejecta played a major role in amplifying the momentum change directly imparted to the asteroid by the spacecraft. That momentum change was amplified by a factor of 2.2 to 4.9 (depending on the mass of Dimorphos), indicating the momentum change transferred because of ejecta production significantly exceeded the momentum change from the DART spacecraft alone. While the orbital change was small, the change is in the velocity and over the course of years will accumulate to a large change in position. For a hypothetical Earth-threatening body, even such a tiny change could be sufficient to mitigate or prevent an impact, if applied early enough. As the diameter of Earth is around 13,000 kilometers, a hypothetical asteroid impact could be avoided with as little of a shift as half of that (6,500 kilometers). A 2 cm/s velocity change accumulates to that distance in approximately 10 years. + +By smashing into the asteroid, DART made Dimorphos an active asteroid. Scientists had proposed that some active asteroids are the result of impact events, but no one had ever observed the activation of an asteroid. The DART mission activated Dimorphos under precisely known and carefully observed impact conditions, enabling the detailed study of the formation of an active asteroid for the first time. Observations show that Dimorphos lost approximately 1 million kilograms of mass as a result of the collision. + +==== Sequence of operations for impact ==== + +== Gallery == + +== See also == +Asteroid impact avoidance – Methods to prevent destructive asteroid hits +B612 Foundation – Planetary defense nonprofit organization +Deep Impact (spacecraft) – NASA space probe launched in 2005 +Don Quijote (spacecraft) – Space probe concept +NEO Surveyor – Space-based infrared telescope +The Spaceguard Foundation – Organization studying near-Earth objects + +== Notes == + +== References == + +== External links == + +Double Asteroid Redirection Test (DART) Mission – NASA's Planetary Defense page on DART +DART's Mission to Bump an Asteroid – NASA Blog +NASA's DART Mission Launch, 24 November 2021 – Official Broadcast/Stream +DART's Impact with Asteroid Dimorphos (Official NASA Broadcast) \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Douglas_Vakoch-0.md b/data/en.wikipedia.org/wiki/Douglas_Vakoch-0.md new file mode 100644 index 000000000..5ab507965 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Douglas_Vakoch-0.md @@ -0,0 +1,28 @@ +--- +title: "Douglas Vakoch" +chunk: 1/3 +source: "https://en.wikipedia.org/wiki/Douglas_Vakoch" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:16.126688+00:00" +instance: "kb-cron" +--- + +Douglas A. Vakoch ( VAH-kohtch; born June 16, 1961) is an American astrobiologist, search for extraterrestrial intelligence (SETI) researcher, psychologist, and president of METI International, a nonprofit research and educational organization devoted to transmitting intentional signals to extraterrestrial civilizations. + +== Early life and education == +Douglas Vakoch grew up in rural Minnesota. He created his first interstellar message as a high school student—a series of two-dimensional pictures that built upon a message transmitted from Arecibo Observatory in 1974. "The issue that really hit me early on, and that has stayed with me, is just the challenge of creating a message that would be understandable," he told The New York Times Magazine. Vakoch earned a bachelor's degree in comparative religion from Carleton College, a master's degree in history and philosophy of science from the University of Notre Dame, and a PhD in psychology from Stony Brook University. He completed a postdoctoral fellowship at Vanderbilt University before he accepted a position at the SETI Institute in Mountain View, California. + +== Active Search for Extraterrestrial Intelligence (Active SETI) == +Vakoch argues that in order to make contact, humankind may need to take the initiative in transmitting, a project called active SETI. He has been called "a prominent voice in favor of active SETI," "the most prominent METI [messaging to extraterrestrial intelligence] proponent," and "the man who speaks for Earth." In Discover's ranking of scientists either in favor of or opposed to transmitting, Vakoch was cited as "super pro," at the extreme of those advocating messaging. After sixteen years at the SETI Institute, where he was director of Interstellar Message Composition, Vakoch founded METI (Messaging Extraterrestrial Intelligence), a nonprofit research and educational organization. + +== Passive SETI == +In 2010, Vakoch was one of the leaders of Project Dorothy, a multinational effort launched by Japanese astronomer Shin-ya Narusawa to observe several stars for signals from other civilizations to commemorate the fiftieth anniversary of Project Ozma, the first modern-day search for extraterrestrial intelligence (SETI). Telling The Washington Post about the Project Dorothy observations, Vakoch said "[w]hat this weekend really does is begin the process of making it possible to track a possible SETI signal around the globe," and he added "[i]f a signal is detected, it has to be confirmed and followed, and now we're setting up a network to do that." +Vakoch contends that it is essential to expand an understanding of SETI beyond the technology needed to search by also re-examining assumptions about the nature of intelligence, which was the motivation for the METI workshop, “The Intelligence of SETI: Cognition and Communication in Extraterrestrial Intelligence,” held in San Juan, Puerto Rico on May 18, 2016. "By studying the variety of intelligence found on Earth," Vakoch said, "we can gain new insights into sending messages to life on other planets." Vakoch told the International Business Times that "[i]n this new approach, we're putting the intelligence back into SETI." He argues that the fact that extraterrestrial intelligence may rely on different senses than humans adds to the complexity of interspecies communication. + +== Interstellar message design == + +Vakoch "leads an international group of scientists, artists and scholars from the humanities, as they ponder how we could communicate what it’s like to be human across the vast distances of interstellar space." He advocates creating interstellar messages that begin with concepts shared by humans and extraterrestrials, such as basic mathematics and science and building on these shared concepts to express content that may be distinctly human. He argues that while mathematics and science provide the best starting point for interstellar messages, it is possible that extraterrestrial mathematics and science may vary significantly from human mathematics and science. He notes that on Earth both Euclidean and non-Euclidean geometries provide internally consistent frameworks for understanding the world, but they vary in their foundational assumptions. +In contrast to the images included on the Voyager Golden Record that emphasized the positive aspects of life on Earth, Vakoch proposes that we should be honest about human frailties. He suggests that the most informative things that humankind can convey to an advanced civilization are the struggles humankind is going through as an adolescent technological civilization. Vakoch argues that if we contact other civilizations, they will likely be thousands or millions of years older than humanity's civilization, meaning the extraterrestrial civilization would have greater stability. "If we wish to convey what it is about us that is distinctive, it may be our weakness, our fears, our unknowing – and yet a willingness to forge ahead to attempt contact in spite of this," Vakoch told The Psychologist. +Vakoch calls for increasing the range of people participating in interstellar message design, and he led a workshop in Paris in 2002 on the interface of art and science in interstellar messages. Speaking to Reuters on the day of the meeting, he said "Today the focus has been on whether we can explain something about our aesthetic sensibilities. Is there something about art that is either universal or that can be taught...?" +Vakoch also led meetings attended by anthropologists and sociologists, and he advocates interstellar messages that capture the diversity of human cultures. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Douglas_Vakoch-1.md b/data/en.wikipedia.org/wiki/Douglas_Vakoch-1.md new file mode 100644 index 000000000..8351a7f27 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Douglas_Vakoch-1.md @@ -0,0 +1,27 @@ +--- +title: "Douglas Vakoch" +chunk: 2/3 +source: "https://en.wikipedia.org/wiki/Douglas_Vakoch" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:16.126688+00:00" +instance: "kb-cron" +--- + +== Space exploration == +Vakoch has contributed to the study of space exploration, most notably through books examining psychological dimensions of space travel. The Journal of Military History noted about Vakoch's edited book Psychology of Space Exploration: Contemporary Research in Historical Perspective that "[m]ost interestingly to those whose primary interest lies in history, many of the chapters engage the history of the psychology of space exploration quite well." Aviation, Space, and Environmental Medicine observed that "[i]t is certainly worthwhile reading for those directly involved in the next phase of human exploration of space as well as those who will witness this phase from the confines of Earth." Isis wrote that "[t]his diverse and thought-provoking collection represents an important departure for the NASA History Series, a turn from works focused on machines, missions, and management structures to a concern with the smaller group of space sciences interested in human subjects, like space medicine and human factors engineering" and noted that the book "represents an important step in bringing the human-focused space sciences to the attention of a wider audience." +The Journal of Mind and Behavior noted that Vakoch's follow-up book On Orbit and Beyond: Psychological Perspectives on Human Spaceflight includes several chapters that address the implications of the increased autonomy that astronauts would have on missions to Mars and Saturn, as compared to orbiting Earth or travelling to the Moon. In an interview Vakoch explained the implications of this increased autonomy: "On missions to Mars, where greater autonomy will be expected of astronauts because of the greater distances, ground personnel should expect that their own roles will change over the course of the mission." +At the 2008 annual convention of the American Psychological Association, Vakoch chaired the symposium "To the Moon and Mars: Psychology of Long-Duration Space Exploration," which was identified as a "highlight" of the convention. +Vakoch has also examined unmanned space exploration. Commenting on plans to send miniature spacecraft to a nearby star, he told the International Business Times that "[b]y sending hundreds or thousands of space probes the size of postage stamps, Breakthrough Starshot gets around the hazards of spaceflight that could easily end a mission relying on a single spacecraft. Only one nanocraft needs to make its way to Alpha Centauri and send back a signal for the mission to be successful." +Focusing within the Solar System, he commented on NASA's plans to send a lander to Jupiter's moon Europa, telling Gizmodo that "[t]he top priority of this lander mission will be to search for evidence of life on Europa," adding that "even if that main goal isn’t met, we will learn a great deal about the potential habitability of this icy moon." Along with colleagues from METI International, he collected 103 words for water in languages from around the world that were engraved on a metal plate attached to the Europa Clipper spacecraft, and he designed the graphic depiction of hydrogen and hydroxyl lines for the same plate that symbolize key radio frequencies that guided early SETI searches. + +== Cognitive, cross-cultural, and clinical psychology == +Vakoch has collaborated on several empirical studies of human cognition. His research in psycholinguistics with Lee Wurm explores the perception of speech and emotion from an evolutionary framework, with their findings indicating that "speech perception and the affective lexicon" are "closely tied together." Vakoch's experimental work with Yuh-Shiow Lee suggests that complex rules are learned better through implicit learning, while simple rules are learned better through explicit learning, with their research suggesting that "implicit learning can be more efficient than explicit learning." Vakoch and the late psychotherapy researcher Hans Herrman Strupp suggested that the expert understanding of experienced psychotherapists is not adequately captured by manualized psychotherapy, and they argued that manualized training can impede "the development of clinical judgment and complex reasoning." + +== Recognition == +Vakoch was elected as a member of the International Institute of Space Law in 2002. +In 2006 he was awarded a Leonardo da Vinci Space Art Award "for dedication to the language and codes for broader cosmic reception and communication and their broader cultural meanings." +Vakoch was elected as a corresponding member of the International Academy of Astronautics in 2009. +Vakoch is a member of the International Astronomical Union (IAU). Within the IAU, he is a member of Division B (Facilities, Technologies and Data Science), Division C (Education, Outreach and Heritage), Division F (Planetary Systems and Bioastronomy), Commission B4 (Radio Astronomy), Commission C2 (Communicating Astronomy with the Public), and Commission F3 (Astrobiology). + +== Filmography == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Douglas_Vakoch-2.md b/data/en.wikipedia.org/wiki/Douglas_Vakoch-2.md new file mode 100644 index 000000000..2b6231c8d --- /dev/null +++ b/data/en.wikipedia.org/wiki/Douglas_Vakoch-2.md @@ -0,0 +1,42 @@ +--- +title: "Douglas Vakoch" +chunk: 3/3 +source: "https://en.wikipedia.org/wiki/Douglas_Vakoch" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:16.126688+00:00" +instance: "kb-cron" +--- + +== Selected bibliography == +Vakoch, D. A. (2011). Communication with extraterrestrial intelligence. Albany, State University of New York Press. +Vakoch, D. A. (2011). Ecofeminism and rhetoric: critical perspectives on sex, technology, and discourse. New York, Berghahn Books. +Vakoch, D. A. (2011). Psychology of space exploration: contemporary research in historical perspective. Washington, DC, National Aeronautics and Space Administration, Office of Communications, History Program Office. +Vakoch, D. A. (2012). Feminist ecocriticism: environment, women, and literature. Lanham, MD, Lexington Books. +Vakoch, D. A. (2013). Altruism in cross-cultural perspective. New York, Springer. +Vakoch, D. A. (2013). Astrobiology, history and society: life beyond earth and the impact of discovery. Heidelberg, Springer Verlag. +Vakoch, D. A. (2013). On orbit and beyond: psychological perspectives on human spaceflight. Heidelberg, Germany, Springer-Verlag. +Vakoch, D. A. (2014). Archaeology, Anthropology, and Interstellar Communication. Washington, DC, National Aeronautics and Space Administration, Office of Communications, Public Outreach Division, History Program Office. +Vakoch, D. A. (2014). Extraterrestrial altruism: evolution and ethics in the cosmos. Heidelberg [u.a.], Springer. +Vakoch, D. A. (2020). Transecology: transgender perspectives on environment and nature. Abindgon, Oxon, Routledge. +Vakoch, D. A. (2021). Dystopias and utopias on earth and beyond: feminist ecocriticism of science fiction. London, Routledge. +Vakoch, D. A. (2021). Ecofeminist science fiction: international perspectives on gender, ecology, and literature. London, Routledge. +Vakoch, D. A. (2022). Transgender India: understanding third gender identities and experiences. Cham, Switzerland, Springer. +Vakoch, D. A. (2023). The Routledge handbook of ecofeminism and literature. London, Routledge. +Vakoch, D. A., and Anae, N. (2022). Indian feminist ecocriticism. Lanham, MD, Lexington Books. +Vakoch, D. A., & Castrillon, F. (2014). Ecopsychology, phenomenology, and the environment: the experience of nature. New York, Springer. +Vakoch, D. A., & Dowd, M. F. (2015). The Drake equation: estimating the prevalence of extraterrestrial life through the ages. Cambridge, Cambridge University Press. +Vakoch, D. A., & Harrison, A. A. (2011). Civilizations beyond earth: extraterrestrial life and society. New York, Berghahn Books. +Vakoch, D. A., & Mickey, S. (2018). Ecofeminism in dialogue. Lanham, MD, Lexington Books. +Vakoch, D. A., & Mickey, S. (2018). Literature and ecofeminism: intersectional and international voices. London, Routledge. +Vakoch, D. A., & Mickey, S. (2018). Women and nature?: beyond dualism in gender, body, and environment. London, Routledge. +Vakoch, D. A., & Mickey, S. (2022). Eco-anxiety and planetary hope: experiencing the twin disasters of Covid-19 and climate change. Cham, Switzerland, Springer. +Vakoch, D. A., & Mickey, S. (2023). Eco-anxiety and pandemic distress: psychological perspectives on resilience and interconnectedness. Oxford, Oxford University Press. +Vakoch, D. A., Pollock, J. C., & Caleb, A. M. (2023). COVID communication. Cham, Switzerland, Springer. +Vakoch, D. A., & Punske, J. (2023). Xenolinguistics: Towards a science of extraterrestrial language. London, Routledge. +Vakoch, D. A., & Sharp, S. (2024). The Routledge handbook of trans literature. London, Routledge, + +== References == + +== External links == +Douglas Vakoch at IMDb \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Europa_Clipper-0.md b/data/en.wikipedia.org/wiki/Europa_Clipper-0.md new file mode 100644 index 000000000..ed70c6007 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Europa_Clipper-0.md @@ -0,0 +1,31 @@ +--- +title: "Europa Clipper" +chunk: 1/6 +source: "https://en.wikipedia.org/wiki/Europa_Clipper" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:31.671242+00:00" +instance: "kb-cron" +--- + +Europa Clipper (previously known as the Europa Multiple Flyby Mission) is a space probe developed by NASA to study Europa, a Galilean moon of Jupiter. Launched by a Falcon Heavy on October 14, 2024, the probe is planned to enter Jupiter orbit in April 2030 and conduct a series of flybys of Europa from March 2031. Europa Clipper is the largest interplanetary spacecraft ever launched by NASA. The mission used a gravity assist from Mars in March 2025, and will use an assist from Earth in December 2026. +Europa Clipper will investigate the subsurface ocean below Europa's ice crust, found by the Galileo spacecraft which orbited Jupiter from 1995 to 2003. Previous Europa missions Europa Orbiter and Jupiter Icy Moons Orbiter called for orbiting the moon. However, Europa's vicinity experiences extreme radiation, being deep within the magnetosphere of Jupiter. Thus Europa Clipper will use an elliptical orbit around Jupiter and make 49 close flybys of the moon. The orbiter aims to analyze the induced magnetic field around Europa, and detect and directly sample the subsurface ocean via its water vapor plume ejecta from cryovolcanoes. +The mission's name is a reference to the lightweight, fast clipper ships of the 19th century that routinely plied trade routes, since the spacecraft will pass by Europa at a rapid cadence, as frequently as every two weeks. The mission patch, which depicts a sailing ship, references the moniker. Europa Clipper complements the ESA's Jupiter Icy Moons Explorer, launched in 2023, which will attempt to fly past Europa twice and Callisto multiple times before moving into orbit around Ganymede. + +== History == + +=== Early proposals and Galileo discoveries === +In 1997, a Europa Orbiter mission was proposed by a team for NASA's Discovery Program but was not selected. NASA's JPL announced one month after the selection of Discovery proposals that a NASA Europa orbiter mission would be conducted. JPL then invited the Discovery proposal team to be the Mission Review Committee (MRC). +At the same time as the proposal of the Discovery-class Europa Orbiter, the robotic Galileo spacecraft was already orbiting Jupiter. From December 8, 1995, to December 7, 1997, Galileo conducted the primary mission after entering the orbit of Jupiter. On that final date, the Galileo orbiter commenced an extended mission known as the Galileo Europa Mission (GEM), which ran until December 31, 1999. This was a low-cost mission extension with a budget of only US$30 million. The smaller team of about 40–50 people (compared with the primary mission's 200-person team from 1995 to 1997) did not have the resources to deal with problems, but when they arose, it was able to temporarily recall former team members (called "tiger teams") for intensive efforts to solve them. The spacecraft made several flybys of Europa (8), Callisto (4) and Io (2). On each flyby of the three moons it encountered, the spacecraft collected only two days' worth of data instead of the seven it had collected during the primary mission. During GEM's eight flybys of Europa, it ranged from 196 to 3,582 km (122 to 2,226 mi), in two years. +Europa has been identified as one of the locations in the Solar System that could possibly harbor microbial extraterrestrial life. Immediately following the Galileo spacecraft's discoveries and the independent Discovery program proposal for a Europa orbiter, JPL conducted preliminary mission studies that envisioned a capable spacecraft such as the Jupiter Icy Moons Orbiter (a US$16 billion mission concept), the Jupiter Europa Orbiter (a US$4.3 billion concept), another orbiter (US$2 billion concept), and a multi-flyby spacecraft: Europa Clipper. +A mission to Europa was recommended by the National Research Council in 2013. The approximate cost estimate rose from US$2 billion in 2013 to US$4.25 billion in 2020. The mission is a joint project between the Johns Hopkins University's Applied Physics Laboratory (APL), and the Jet Propulsion Laboratory (JPL). + +=== Funding put forward === +In March 2013, US$75 million was authorized to expand on the formulation of mission activities, mature the proposed science goals, and fund preliminary instrument development, as suggested in 2011 by the Planetary Science Decadal Survey. In May 2014, a House bill substantially increased the Europa Clipper (referred to as Europa Multiple Flyby Mission) funding budget for the 2014 fiscal year from US$15 million to US$100 million to be applied to pre-formulation work. Following the 2014 election cycle, bipartisan support was pledged to continue funding for the Europa Multiple Flyby Mission project. The executive branch also granted US$30 million for preliminary studies. + +=== Formulation === +In April 2015, NASA invited the ESA to submit concepts for an additional probe to fly together with the Europa Clipper spacecraft, with a mass limit of 250 kg. It could be a simple probe, an impactor, or a lander. An internal assessment at ESA considered whether there was interest and funds available, opening a collaboration scheme similar to the very successful Cassini–Huygens approach. +In May 2015, NASA chose nine instruments that would fly on board the orbiter, budgeted to cost about US$110 million over the next three years. In June 2015, NASA approved the mission concept, allowing the orbiter to move to its formulation stage. In January 2016, NASA approved the addition of a lander, but this was canceled in 2017 because it was deemed too risky. In May 2016, the Ocean Worlds Exploration Program was approved, of which the Europa mission is part. +In February 2017, the mission moved from Phase A to Phase B (the preliminary design phase). On July 18, 2017, the House Space Subcommittee held hearings on the Europa Clipper as a scheduled Large Strategic Science Missions class, and to discuss a possible follow up mission simply known as the Europa Lander. Phase B continued into 2019. In addition, subsystem vendors were selected, as well as prototype hardware elements for the science instruments. Spacecraft sub-assemblies were built and tested as well. + +=== Fabrication and assembly === \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Europa_Clipper-1.md b/data/en.wikipedia.org/wiki/Europa_Clipper-1.md new file mode 100644 index 000000000..f42928821 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Europa_Clipper-1.md @@ -0,0 +1,39 @@ +--- +title: "Europa Clipper" +chunk: 2/6 +source: "https://en.wikipedia.org/wiki/Europa_Clipper" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:31.671242+00:00" +instance: "kb-cron" +--- + +On August 19, 2019, the Europa Clipper proceeded to Phase C: final design and fabrication. +On March 3, 2022, the spacecraft moved on to Phase D: assembly, testing, and launch. On June 7, 2022, the main body of the spacecraft was completed. By August 2022, the high-gain antenna had completed its major testing campaigns. +By January 30, 2024, all of the science instruments were added to the spacecraft. In March 2024, it was reported that the spacecraft underwent successful testing and was on track for launch later in the year. In May 2024, the spacecraft arrived at Kennedy Space Center for final launch preparations. In September 2024, final pre-launch review was successfully completed, clearing the way for launch. In early October 2024, due to the incoming Hurricane Milton, the spacecraft was placed in secure storage for safekeeping until the hurricane passed. + +=== Launch === +In July 2024, the spacecraft faced concerns of delay and missing the launch window because of a discovery in June 2024 that its components were not as radiation-hardened as previously believed. However, over the summer, intensive re-testing of the transistor components in question found that they would likely be annealed enough to 'self-heal'. In September 2024, Europa Clipper was approved for a launch window opening on October 10, 2024; however, on October 6, 2024, NASA announced that it would be standing down from the October 10 launch due to Hurricane Milton. Europa Clipper was finally launched on October 14, 2024. + +=== End of mission planning === +The probe is scheduled to be crashed into Jupiter, Ganymede, or Callisto, to prevent it from crashing into Europa. In June 2022, lead project scientist Robert Pappalardo revealed that mission planners for Europa Clipper were considering disposing of the probe by crashing it into the surface of Ganymede in case an extended mission was not approved early in the main science phase. He noted that an impact would help the ESA's Juice mission collect more information about Ganymede's surface chemistry. In a 2024 paper, Pappalardo said the mission would last four years in Jupiter orbit, and that disposal was targeted for September 3, 2034 if NASA did not approve a mission extension. + +== Objectives == + +The goals of Europa Clipper are to explore Europa, investigate its habitability and aid in the selection of a landing site for the proposed Europa Lander. This exploration is focused on understanding the three main requirements for life: liquid water, chemistry, and energy. Specifically, the objectives are to study: + +Ice shell and ocean: Confirm the existence and characterize the nature of water within or beneath the ice, and study processes of surface-ice-ocean exchange. +Composition: Distribution and chemistry of key compounds and the links to ocean composition. +Geology: Characteristics and formation of surface features, including sites of recent or current activity. +The spacecraft carries scientific instruments which will be used to analyze the potential presence of geothermal activity and the moon's induced magnetic field; which in turn will provide an indication to the presence of saline rich subsurface ocean(s). + +=== Strategy === + +Because Europa lies well within the harsh radiation fields surrounding Jupiter, even a radiation-hardened spacecraft in near orbit would only remain functional for just a few months. Most instruments can gather data far faster than the communications system can transmit it to Earth due to the limited number of antennas available on Earth to receive the scientific data. Therefore, another key limiting factor on science for a Europa orbiter is the time available to return data to Earth. In contrast, the amount of time during which the instruments can make close-up observations is less important. +Studies by scientists from the Jet Propulsion Laboratory show that by performing several flybys with many months to return data, the Europa Clipper concept will enable a US$2 billion mission to conduct the most crucial measurements of the canceled US$4.3 billion Jupiter Europa Orbiter concept. Between each of the flybys, the spacecraft will have seven to ten days to transmit data stored during each brief encounter. That will let the spacecraft have up to a year of time to transmit its data compared to just 30 days for an orbiter. The result will be almost three times as much data returned to Earth, while reducing exposure to radiation. Europa Clipper will not orbit Europa, but will instead orbit Jupiter and conduct 49 flybys of Europa, each at altitudes ranging from 25 to 2,700 km (16 to 1,678 mi) during its 3.5-year mission. A key feature of the mission concept is that Europa Clipper would use gravity assists from Europa, Ganymede and Callisto to change its trajectory, allowing the spacecraft to return to a different close approach point with each flyby. Each flyby would cover a different sector of Europa to achieve a medium-quality global topographic survey, including ice thickness. Europa Clipper could conceivably fly by at low altitude through the plumes of water vapor erupting from the moon's ice crust, thus sampling its subsurface ocean without having to land on the surface and drill through the ice. +The spacecraft is expected to receive a total ionizing dose of 2.8 megarads (28 kGy) during the mission. Shielding from Jupiter's harsh radiation belt will be provided by a radiation vault with 9.2-millimeter-thick (0.36 in) aluminum alloy walls, which enclose the spacecraft electronics. To maximize the effectiveness of this shielding, the electronics are also nested in the core of the spacecraft for additional radiation protection. + +== Design and construction == + +Europa Clipper is a NASA Planetary Science Division mission, designated a Large Strategic Science Mission, and funded under the Planetary Missions Program Office's Solar System Exploration program as its second flight. It is also supported by the new Ocean Worlds Exploration Program. +The spacecraft bus is a 5-meter-long combination of a 150-cm-wide aluminum cylindrical propulsion module and a rectangular box. The electronic components are protected from the intense radiation by a 150-kilogram titanium, zinc and aluminum shielded vault in the box. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Europa_Clipper-2.md b/data/en.wikipedia.org/wiki/Europa_Clipper-2.md new file mode 100644 index 000000000..ec0daa509 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Europa_Clipper-2.md @@ -0,0 +1,39 @@ +--- +title: "Europa Clipper" +chunk: 3/6 +source: "https://en.wikipedia.org/wiki/Europa_Clipper" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:31.671242+00:00" +instance: "kb-cron" +--- + +=== Power === +Both radioisotope thermoelectric generator (RTG) and photovoltaic power sources were assessed as options to power the orbiter. Although solar power is only 4% as intense at Jupiter as it is in Earth's orbit, powering a Jupiter orbital spacecraft with solar panels was demonstrated by the Juno mission. The alternative to solar panels was a multi-mission radioisotope thermoelectric generator (MMRTG), fueled with plutonium-238. The power source had already been demonstrated in the Mars Science Laboratory (MSL) mission. Five units were available, with one reserved for the Mars 2020 rover mission and another as backup. In September 2013, it was decided that the solar array was the less expensive option to power the spacecraft, and on October 3, 2014, it was announced that solar panels were chosen to power Europa Clipper. The mission's designers determined that solar power was both cheaper than plutonium and practical to use on the spacecraft. Despite the increased weight of solar panels compared to plutonium-powered generators, the vehicle's mass was projected to still be within acceptable launch limits. +Each panel has a surface area of 18 m2 (190 sq ft) and produces 150 watts continuously when pointed towards the Sun while orbiting Jupiter. When in Europa's shadow, onboard batteries charged by the solar panels will enable the spacecraft to continue gathering data. However, ionizing radiation can damage solar panels. The Europa Clipper's orbit will pass through Jupiter's intense magnetosphere, which is expected to gradually degrade the solar panels as the mission progresses. The solar panels were provided by Airbus Defence and Space, Netherlands. + +=== Propulsion === +The propulsion subsystem was built by NASA's Goddard Space Flight Center in Greenbelt, Maryland. It is part of the Propulsion Module, delivered by Johns Hopkins Applied Physics Laboratory in Laurel, Maryland. It is 3 meters (10 ft) tall, 1.5 meters (5 ft) in diameter and comprises about two-thirds of the spacecraft's main body. The propulsion subsystem carries nearly 2,700 kilograms (6,000 lb) of monomethyl hydrazine and dinitrogen tetroxide propellant, 50% to 60% of which will be used for the 6-to-8-hour Jupiter orbit insertion burn. The spacecraft has a total of 24 rocket engines rated at 27.5 N (6.2 lbf) thrust for attitude control and propulsion. + +=== Communication === + +The spacecraft includes a suite of antennas for communication and scientific measurements. Chief among them is the high-gain antenna (HGA), which is 3.1 meters (10 feet) in diameter and is capable of both uplink and downlink communications over multiple frequency bands. The HGA operates on X-band frequencies of 7.2 GHz (uplink) and 8.4 GHz (downlink), as well as a Ka-band frequency of 32 GHz, approximately 12 times higher than typical cellular communications. +The communication system includes additional antennas such as low-gain antennas (LGAs), medium-gain antennas (MGAs), and fan-beam antennas (FBAs), which are used for different mission phases depending on orientation and distance from Earth. +The Ka-band is primarily used for high-rate data return, enabling faster transmission of scientific data. Data rates vary depending on antenna alignment, frequency, and ground station availability. Downlink data rates via X-band can reach approximately 16 kilobits per second, while Ka-band transmissions can reach up to 500 kilobits per second under optimal conditions. Uplink rates for command transmission are typically around 2 kilobits per second. +The antenna system supports not only communications but also radio science and gravity science experiments. Using coherent two-way X-band Doppler tracking and radio occultation techniques, researchers will study Europa's internal structure, ice shell thickness, ocean characteristics, and gravity field. Small variations in the spacecraft's velocity—detected via Doppler shifts—will help scientists determine the moon's mass distribution and potential subsurface ocean. +The HGA was designed and developed under the leadership of Matt Bray at the Johns Hopkins Applied Physics Laboratory (APL), and underwent rigorous testing at Langley Research Center and Goddard Space Flight Center in 2022, including beam pattern, thermal vacuum, and vibration testing to ensure precision and reliability. + +=== Scientific equipment === +The Europa Clipper mission is equipped with nine scientific instruments. The nine science instruments for the orbiter, announced in May 2015, have a planned total mass of 82 kg (181 lb). + +==== Europa Thermal Emission Imaging System (E-THEMIS) ==== +The Europa Thermal Emission Imaging System will provide high spatial resolution as well as multi-spectral imaging of the surface of Europa in the mid to far infrared bands to help detect heat which would suggest geologically active sites and areas, such as potential vents erupting plumes of water into space. +The principal investigator is Philip Christensen of Arizona State University. This instrument is derived from the Thermal Emission Imaging System (THEMIS) on the 2001 Mars Odyssey orbiter, also developed by Philip Christensen. + +==== Mapping Imaging Spectrometer for Europa (MISE) ==== + +The Mapping Imaging Spectrometer for Europa is an imaging near infrared spectrometer to probe the surface composition of Europa, identifying and mapping the distributions of organics (including amino acids and tholins), salts, acid hydrates, water ice phases, and other materials. +The principal investigator is Diana Blaney of Jet Propulsion Laboratory and the instrument was built in collaboration with the Johns Hopkins University Applied Physics Laboratory (APL). + +==== Europa Imaging System (EIS) ==== +The Europa Imaging System consists of visible spectrum cameras to map Europa's surface and study smaller areas in high resolution, as low as 0.5 m (20 in) per pixel. It consists of two cameras, both of which use 2048x4096 pixel CMOS detectors: \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Europa_Clipper-3.md b/data/en.wikipedia.org/wiki/Europa_Clipper-3.md new file mode 100644 index 000000000..b520c3387 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Europa_Clipper-3.md @@ -0,0 +1,46 @@ +--- +title: "Europa Clipper" +chunk: 4/6 +source: "https://en.wikipedia.org/wiki/Europa_Clipper" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:31.671242+00:00" +instance: "kb-cron" +--- + +The Wide-angle Camera (WAC) has a field of view of 48° by 24° and a resolution of 11 m (36 ft) from a 50 km (31 mi) altitude. Optically the WAC uses 8 lens refractive optics with an 8 mm aperture and a 46 mm focal length which give it a f-number of f/5.75. The WAC will obtain stereo imagery swaths throughout the mission. +The Narrow-angle Camera (NAC) has a 2.3° by 1.2° field of view, giving it a resolution of 0.5 m (20 in) per pixel from a 50 km (31 mi) altitude. Optically the NAC uses a Ritchey Chrétien Cassegrain telescope with a 152 mm aperture and a 1000 mm focal length which give it a f-number of f/6.58. The NAC is mounted on a 2-axis gimbal, allowing it to point at specific targets regardless of the main spacecraft's orientation. This will allow for mapping of >95% of Europa's surface at a resolution of ≤50 m (160 ft) per pixel. For reference, only around 14% of Europa's surface has previously been mapped at a resolution of ≤500 m (1,600 ft) per pixel. +The principal investigator is Elizabeth Turtle of the Applied Physics Laboratory. + +==== Europa Ultraviolet Spectrograph (Europa-UVS) ==== +The Europa Ultraviolet Spectrograph instrument will be able to detect small erupting plumes, and will provide valuable data about the composition and dynamics of the moon's exosphere. +The principal investigator is Kurt Retherford of Southwest Research Institute. Retherford was previously a member of the group that discovered plumes erupting from Europa while using the Hubble Space Telescope in the UV spectrum. + +==== Radar for Europa Assessment and Sounding: Ocean to Near-surface (REASON) ==== +The Radar for Europa Assessment and Sounding: Ocean to Near-surface (REASON) is a dual-frequency ice penetrating radar (9 and 60 MHz) instrument that is designed to sound Europa's ice crust from the near-surface to the ocean, revealing the hidden structure of Europa's ice shell and potential water pockets within. REASON will probe the exosphere, surface and near-surface and the full depth of the ice shell to the ice-ocean interface up to 30 km. +The principal investigator is Donald Blankenship of the University of Texas at Austin. This instrument was built by Jet Propulsion Laboratory. + +==== Europa Clipper Magnetometer (ECM) ==== +The Europa Clipper Magnetometer (ECM) will be used to analyze the magnetic field around Europa. The instrument consists of three flux gates placed along an 8.5-meter (28 ft) boom, which were stowed during launch and deployed afterwards. The magnetic field of Jupiter is thought to induce electric current in a salty ocean beneath Europa's ice, which in turn leads Europa to produce its own magnetic field, therefore by studying the strength and orientation of Europa's magnetic field over multiple flybys, scientists hope to be able to confirm the existence of Europa's subsurface ocean, as well as characterize the thickness of its icy crust and estimate the water's depth and salinity. +The instrument team leader is Margaret Kivelson, University of Michigan. +ECM replaced the proposed Interior Characterization of Europa using Magnetometry (ICEMAG) instrument, which was canceled due to cost overruns. ECM is a simpler and cheaper magnetometer than ICEMAG would have been. + +==== Plasma Instrument for Magnetic Sounding (PIMS) ==== + +The Plasma Instrument for Magnetic Sounding (PIMS) measures the plasma surrounding Europa to characterize the magnetic fields generated by plasma currents. These plasma currents mask the magnetic induction response of Europa's subsurface ocean. In conjunction with a magnetometer, it is key to determining Europa's ice shell thickness, ocean depth, and salinity. PIMS will also probe the mechanisms responsible for weathering and releasing material from Europa's surface into the atmosphere and ionosphere and understanding how Europa influences its local space environment and Jupiter's magnetosphere. +The principal investigator is Joseph Westlake of the Applied Physics Laboratory. + +==== Mass Spectrometer for Planetary Exploration (MASPEX) ==== +The Mass Spectrometer for Planetary Exploration (MASPEX) will determine the composition of the surface and subsurface ocean by measuring Europa's extremely tenuous atmosphere and any surface materials ejected into space. +Jack Waite, who led development of MASPEX, was also Science Team Lead of the Ion and Neutral Mass Spectrometer (INMS) on the Cassini spacecraft. The principal investigator is Jim Burch of Southwest Research Institute, who was previously the leader of the Magnetospheric Multiscale Mission. + +==== Surface Dust Analyzer (SUDA) ==== + +The SUrface Dust Analyzer (SUDA) is a mass spectrometer that will measure the composition of small solid particles ejected from Europa, providing the opportunity to directly sample the surface and potential plumes on low-altitude flybys. The instrument is capable of identifying traces of organic and inorganic compounds in the ice of ejecta, and is sensitive enough to detect signatures of life even if the sample contains less than a single bacterial cell in a collected ice grain. +The principal investigator is Sascha Kempf of the University of Colorado Boulder. + +==== Gravity & Radio Science ==== +Although it was designed primarily for communications, the high-gain radio antenna will be used to perform additional radio observations and investigate Europa's gravitational field, acting as a radio science subsystem. Measuring the Doppler shift in the radio signals between the spacecraft and Earth will allow the spacecraft's motion to be determined in detail. As the spacecraft performs each of its 45 Europa flybys, its trajectory will be altered by the moon's gravitational field. The Doppler data will be used to determine the higher order coefficients of that gravity field, to determine the moon's interior structure, and to examine how Europa is deformed by tidal forces. +The instrument team leader is Erwan Mazarico of NASA's Goddard Space Flight Center. + +== Launch and trajectory == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Europa_Clipper-4.md b/data/en.wikipedia.org/wiki/Europa_Clipper-4.md new file mode 100644 index 000000000..58087f3a1 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Europa_Clipper-4.md @@ -0,0 +1,25 @@ +--- +title: "Europa Clipper" +chunk: 5/6 +source: "https://en.wikipedia.org/wiki/Europa_Clipper" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:31.671242+00:00" +instance: "kb-cron" +--- + +=== Launch preparations === +Congress had originally mandated the Europa Clipper to launch on NASA's Space Launch System (SLS) super heavy-lift launch vehicle, but NASA had requested that other vehicles be allowed to launch the spacecraft due to a foreseen lack of available SLS vehicles. The United States Congress's 2021 omnibus spending bill directed the NASA Administrator to conduct a full and open competition to select a commercial launch vehicle if the conditions to launch the probe on a SLS rocket cannot be met. +On January 25, 2021, NASA's Planetary Missions Program Office formally directed the mission team to "immediately cease efforts to maintain SLS compatibility" and move forward with a commercial launch vehicle. +On February 10, 2021, it was announced that the mission would use a 5.5-year trajectory to the Jovian system, with gravity-assist maneuvers involving Mars (March 1, 2025) and Earth (December 3, 2026). Launch was targeted for a 21-day period between October 10 and 30, 2024, giving an arrival date in April 2030, and backup launch dates were identified in 2025 and 2026. +The SLS option would have entailed a direct trajectory to Jupiter taking less than three years. One alternative to the direct trajectory was identified as using a commercial rocket, with a longer 6-year cruise time involving gravity assist maneuvers at Venus, Earth and/or Mars. Additionally, a launch on a Delta IV Heavy with a gravity assist at Venus was considered. +In July 2021 the decision was announced to launch on a Falcon Heavy rocket, in a fully expendable configuration. Three reasons were given: reasonable launch cost (ca. $178 million), questionable SLS availability, and possible damage to the payload due to strong vibrations caused by the solid boosters attached to the SLS launcher. The move to Falcon Heavy saved an estimated US$2 billion in launch costs alone. NASA was not sure an SLS would be available for the mission since the Artemis program would use SLS rockets extensively, and the SLS's use of solid rocket boosters (SRBs) generates more vibrations in the payload than a launcher that does not use SRBs. The cost to redesign Europa Clipper for the SLS vibratory environment was estimated at US$1 billion. + +=== Launch === +Europa Clipper was originally scheduled to launch on October 10, 2024, two days after a Falcon 9 launched the ESA's Hera to 65803 Didymos from Cape Canaveral Space Force Station on a similar interplanetary trajectory. However, this launch attempt was scrubbed due to Hurricane Milton making landfall in Florida the previous day, resulting in the launch being finalized for several days later. Europa Clipper was launched on October 14, 2024, at 12:06 p.m. EDT from Launch Complex 39A at NASA's Kennedy Space Center on a Falcon Heavy. The rocket's boosters and first stage were both expended as a result of the spacecraft's mass and trajectory; the boosters were previously flown five times (including on the launch of Psyche for NASA and an X-37B for the United States Space Force), while the center stage was flown for only this mission. + +=== Transit and observation === +The trajectory of Europa Clipper started with a gravity assist from Mars on March 1, 2025, causing the probe to slow down a little (speed reduced by 2 km/s) and modifying its orbit around the Sun such that it will allow the spacecraft to fly by Earth on December 3, 2026, gaining additional speed. The probe will then arc (reach aphelion) beyond Jupiter's orbit on October 4, 2029 before slowly falling into Jupiter's gravity well and executing its orbital insertion burn in April 2030. +After entry into the Jupiter system, Europa Clipper will perform a flyby of Ganymede at an altitude of 500 km (310 mi), which will reduce the spacecraft velocity by ~400 m/s (890 mph). This will be followed by firing the main engine at a distance of 11 RJ (Jovian radii), to provide a further ~840 m/s (1,900 mph) of delta-V, sufficient to insert the spacecraft into a 202-day orbit around Jupiter. Once the spacecraft reaches the apoapsis of that initial orbit, it will perform another engine burn to provide a ~122 m/s (270 mph) periapsis raise maneuver (PRM). + +The spacecraft's cruise and science phases will overlap with the ESA's Juice spacecraft, which was launched in April 2023 and will arrive at Jupiter in July 2031. Europa Clipper is due to arrive at Jupiter 15 months prior to Juice, despite launching 18 months later, owing to a more powerful launch vehicle and a faster flight plan with fewer gravity assists. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Europa_Clipper-5.md b/data/en.wikipedia.org/wiki/Europa_Clipper-5.md new file mode 100644 index 000000000..88aee82d3 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Europa_Clipper-5.md @@ -0,0 +1,35 @@ +--- +title: "Europa Clipper" +chunk: 6/6 +source: "https://en.wikipedia.org/wiki/Europa_Clipper" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:31.671242+00:00" +instance: "kb-cron" +--- + +== Public outreach == +To raise public awareness of the Europa Clipper mission, NASA undertook a "Message in a Bottle" campaign, i.e., an actual "Send Your Name to Europa" campaign on June 1, 2023, through which people around the world were invited to send their names as signatories to a poem called "In Praise of Mystery: A Poem for Europa" written by the U.S. Poet Laureate Ada Limón, for the 2.9-billion-kilometer (1.8-billion-mile) voyage to Jupiter. The poem describes the connections between Earth and Europa. +The poem is engraved on Europa Clipper inside a tantalum metal plate, about 7 by 11 inches (18 by 28 centimeters), that seals an opening into the vault. The inward-facing side of the metal plate is engraved with the poem in the poet's own handwriting. The public participants' names are etched onto a microchip attached to the plate, within an artwork of a wine bottle surrounded by the four Galilean moons. After registering their names, participants received a digital ticket with details of the mission's launch and destination. According to NASA, 2,620,861 people signed their names to Europa Clipper's Message in a Bottle, most of whom were from the United States. Other elements etched on the inwards side together with the poem and names are the Drake equation, representations of the spectral lines of a hydrogen atom and the hydroxyl radical, together known as the water hole, and a portrait of planetary scientist Ron Greeley. The outward-facing panel features art that highlights Earth's connection to Europa. Linguists collected recordings of the word "water" spoken in 103 languages, from families of languages around the world. The audio files were converted into waveforms and etched into the plate. The waveforms radiate out from a symbol representing the American Sign Language sign for "water". The research organization METI International gathered the audio files for the words for "water", and its president Douglas Vakoch designed the water hole component of the message. + +== See also == + +Europa Orbiter – Cancelled NASA orbiter mission to Europa +Europa Jupiter System Mission – Laplace – Canceled orbiter mission concept to Jupiter +Exploration of Jupiter – Overview of the exploration of the planet Jupiter and its moons +Galileo (spacecraft) – First NASA mission to orbit Jupiter (1989–2003) +Jupiter Icy Moons Explorer – European mission to study Jupiter and its moons since 2023 +Laplace-P – Proposed Russian spacecraft to study the Jovian moon system and land on Ganymede + +== References == + +== Further reading == +Cochrane, Corey J.; et al. (June 2023). "Magnetic Field Modeling and Visualization of the Europa Clipper Spacecraft". Space Science Reviews. 219 (4): 34. Bibcode:2023SSRv..219...34C. doi:10.1007/s11214-023-00974-y. PMC 10220138. PMID 37251605. +Pappalardo, Robert T.; et al. (June 2024). "Science Overview of the Europa Clipper Mission". Space Science Reviews. 220 (4): 40. Bibcode:2024SSRv..220...40P. doi:10.1007/s11214-024-01070-5. hdl:1721.1/155077. ISSN 0038-6308. +Roberts, James H.; et al. (September 2023). "Exploring the Interior of Europa with the Europa Clipper". Space Science Reviews. 219 (6): 46. Bibcode:2023SSRv..219...46R. doi:10.1007/s11214-023-00990-y. PMC 10457249. PMID 37636325. + +== External links == + +Official website +NASA – Overview of Europa +Nontechnical talk on Europa Clipper by Dr. Robert Pappalardo in the Silicon Valley Astronomy Lecture Series \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/GosNIIOKhT-0.md b/data/en.wikipedia.org/wiki/GosNIIOKhT-0.md new file mode 100644 index 000000000..bd6994bd1 --- /dev/null +++ b/data/en.wikipedia.org/wiki/GosNIIOKhT-0.md @@ -0,0 +1,41 @@ +--- +title: "GosNIIOKhT" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/GosNIIOKhT" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:51.875561+00:00" +instance: "kb-cron" +--- + +The State Research Institute of Organic Chemistry and Technology (Russian: Государственный научно-исследовательский институт органической химии и технологии, romanized: Gosudarstvennyy nauchno-issledovatel'skiy institut organicheskoy khimii i tekhnologii, GosNIIOKhT) is a Russian research institute engaged in the development of chemical technologies for use in the national economy and the production of relevant goods and products. +During the Cold War, the institute participated in the development of chemical weapons for the Soviet Union, notably the Novichok family of nerve agents, one of the most lethal nerve agent families. + + +== History == +GosNIIOKhT was founded in 1924, during the time of the Soviet Union, to conduct research work in organic synthesis and to be for the Soviet state the umbrella organization for it, below which were arrayed a number of satellite institutes. +From the early 1930s, the research institute was engaged in the development of chemical weapons. Significant numbers of scientists were also assigned to develop anti-crop and anti-animal agents. +Between 1971 and 1993, GosNIIOKhT conducted research and synthesis of the Novichok family of nerve agents. +GosNIIOKhT employed approximately 6,000 people by the dissolution of the Soviet Union. The employees worked in Novocheboksarsk on nerve agent production, in Volgograd on nerve agent production, in Dzerzinsk on blister agent production, in Shikhany on testing, and in Nukus, Uzbekistan on testing. +The Yeltsin government alarmed the international community by stating that it could not afford to keep the GosNIIOKhT facilities open or personnel employed, as that would mean starving scientists would have incentive to work for nefarious organizations. +By December 1999 the International Science and Technology Center had borne small fruit. In the opinion of one writer, "permitting the ISTC and the other grant programs to sponsor projects that work with Western commercial companies to retool some equipment and kick off the manufacturing of consumer products at these facilities. An advantage to lifting the congressional ban on defense conversion is that the Western commercial partners would have a frequent presence on site—an arrangement likely to foil efforts to produce warfare agents covertly at these facilities. Such an outcome +is far preferable to allowing the skilled labor at these facilities to become increasingly destitute and even desperate... Entire segments of poison gas experts have no contact with the [ISTC] grant programs, especially those within the design bureaus that have specialized skills in the aerosolization of agents and their weaponization." +Currently, its activities include the production of chemical weapons and other hazardous materials. Other areas of work include the development and production of drugs, toxicological research, preclinical testing, chemical technology, and environmental safety. + + +=== The Navalny affair === +On 15 October 2020, European Union sanctions were imposed on the institute in connection with the alleged poisoning of politician Alexei Navalny. The Council of the European Union's grounds for designation states + +The State Scientific Research Institute for Organic Chemistry and Technology (GosNIIOKhT) is a state research institute with the responsibility for the destruction of chemical weapons stocks inherited from the Soviet Union. +The institute in its original role before 1994 was involved in the development and production of chemical weapons including the toxic nerve agent now known as “Novichok”. After 1994, the same facility took part in the government’s programme for the destruction of the stocks of chemical weapons inherited from the Soviet Union. +On 20 August 2020, Alexei Navalny was taken seriously ill and admitted to a hospital in Omsk, Russian Federation. On 22 August 2020, he was transported to a hospital in Berlin, Germany. A specialised laboratory in Germany subsequently found clear evidence, also corroborated by laboratories in France and Sweden, that Alexei Navalny had been poisoned with a toxic nerve agent of the Novichok group. This toxic agent is accessible only to State authorities in the Russian Federation. + +The deployment of a toxic nerve agent of the Novichok group would therefore only be possible due to the failure of the institute to carry out its responsibility to destroy the stockpiles of chemical weapons. + + +=== US sanctions === +On 21 March 2021, invoking its authorities under the Countering America’s Adversaries Through Sanctions Act (CAATSA) Section 231, the United States Department of State added GosNIIOKhT to its List of Specified Persons as persons that are part of, or operate for or on behalf of, the defense or intelligence sectors of the Government of the Russian Federation. The Department describes GosNIIOKhT as "a Russian institute with a longstanding role in researching and developing chemical weapons, and GosNIIOKhT developed Russia's Novichok chemical weapons. Since 2016, GosNIIOKhT has expanded its research, development, testing, and evaluation capabilities." +In addition, GosNIIOKhT was designated under the authority of the International Emergency Economic Powers Act and Executive Order 13382, "Blocking Property of Weapons of Mass Destruction Proliferators and Their Supporters." + + +== References == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Gough_Island-0.md b/data/en.wikipedia.org/wiki/Gough_Island-0.md new file mode 100644 index 000000000..61ce9f876 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Gough_Island-0.md @@ -0,0 +1,26 @@ +--- +title: "Gough Island" +chunk: 1/3 +source: "https://en.wikipedia.org/wiki/Gough_Island" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:38.207353+00:00" +instance: "kb-cron" +--- + +Gough Island ( GOF), also known historically as Gonçalo Álvares, is a rugged volcanic island in the South Atlantic Ocean. It is a dependency of Tristan da Cunha and part of the British overseas territory of Saint Helena, Ascension and Tristan da Cunha. It is approximately 400 km (250 mi) south-east of the Tristan da Cunha archipelago (which includes Nightingale Island and Inaccessible Island), 2,400 km (1,500 mi) north-east from South Georgia Island, 2,700 km (1,700 mi) west from Cape Town, South Africa, and over 3,200 km (2,000 mi) from the nearest point of South America. +Gough Island is uninhabited, except for the personnel of a weather station (usually six people) that the South African National Antarctic Programme has maintained, with British permission, continually on the island since 1956. It is one of the most remote places with a constant human presence. It is part of the UNESCO World Heritage Site of "Gough and Inaccessible Islands" and one of the most important seabird colonies in the world. + +== Name == +The island was first named Ilha de Gonçalo Álvares on Portuguese maps. Gonçalo Álvares was a Portuguese explorer who discovered the island in 1505. Confusion of the unusual Portuguese saint name Gonçalo with Spanish Diego led to the misnomer Diego Alvarez Island in English-language sources from the 1800s to 1930s. However, the most likely explanation is that it was simply a misreading of "Is. de Go. Alvarez", the name by which the island is represented on some of the early charts, the "de Go" mutating into "Diego". +The name "Gough island" refers to the British mariner Captain Charles Gough of the Richmond, who sighted the island in 1732. + +== History == +The details of the discovery of Gough Island are unclear, but the most likely occasion is July 1505 by the Portuguese explorer Gonçalo Álvares. Maps during the next three centuries named the island after him. On some later maps, this was erroneously given as Diego Alvarez. +According to some historians, the British merchant Anthony de la Roché was the first to land on the island, in the austral autumn of 1675. +Charles Gough rediscovered the island on 3 March 1732, thinking it was a new find. It had been named Gonçalo Álvares since 1505 after the captain of Vasco da Gama's flagship on his epic voyage to the east, and under this name, it was marked with reasonable accuracy on the charts of the South Atlantic during the following 230 or so years. Then, in 1732, Captain Gough of the British ship Richmond reported the discovery of a new island, which he placed 400 miles (640 km) to the east of Gonçalo Álvares. Fifty years later, cartographers realised that the two islands were the same, and despite the priority of the Portuguese discovery, and the greater accuracy of the position given by them, "Gough's Island" was the name adopted. It is still known by its old name Ilha de Gonçalo Álvares in Portuguese, though Portugal lays no claim to any of the islands in the Tristan da Cunha archipelago. +Sealers sometimes briefly inhabited the island in the 19th Century. The earliest known example is a sealing gang from the U.S. ship Rambler (Captain Joseph Bowditch) which remained on the island in the 1804–1805 season. The sealing era lasted from 1804 to 1910 during which 34 sealing vessels are known to have visited the island, one of which was lost offshore. +The Scottish National Antarctic Expedition on the Scotia made the first visit to the island by a scientific party on 21 April 1904, when William Speirs Bruce and others collected specimens. The Shackleton–Rowett Expedition also stopped at the island in 1922. There was a brief period of human occupation for two years from 1936 to 1938 when farming was done to hunt for birds, their eggs, and to extract driftwood, guano and apples. The 1955 Gough Expedition mapped out the internal geography of the island and also studied its biota over several months. +Gough Island was formally claimed in 1938 for the United Kingdom, during a visit by HMS Milford (L51) of the Royal Navy. +In 1995, the island was inscribed as a UNESCO World Heritage Site. In 2004, the site was extended to include Inaccessible Island, and the marine zone of Gough Island was extended from 3 to 12 nautical miles (5.6 to 22.2 km; 3.5 to 13.8 mi). The site was renamed Gough and Inaccessible Islands. The selection criteria for the site do not include its geomorphic interest. As it happens, Gough and Inaccessible Islands are included in a possible "serial trans-boundary nomination" for the Mid-Atlantic Ridge, which would include other volcanic sites in the Atlantic. +Gough Island is the only land outside South America from which the solar eclipse of 12 September 2034 (excluding partial phases), will be visible; the centre of the path of totality crosses over the island. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Gough_Island-1.md b/data/en.wikipedia.org/wiki/Gough_Island-1.md new file mode 100644 index 000000000..5e8648c20 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Gough_Island-1.md @@ -0,0 +1,38 @@ +--- +title: "Gough Island" +chunk: 2/3 +source: "https://en.wikipedia.org/wiki/Gough_Island" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:38.207353+00:00" +instance: "kb-cron" +--- + +== Geography and geology == +One of the most remote islands in the world, Gough Island is in the South Atlantic Ocean. While the central part of the island is a plateau, the western part has a highland with the peaks and cliffs rising over 350 metres. Gough Island is roughly rectangular with a length of 13 km (8.1 mi) and a width of 5 km (3.1 mi). It has an area of 65 km2 (25 sq mi) and rises to a highest point over 900 m (3,000 ft) above sea level. Glens cut deep into the inland mountains from the northern and eastern sides. Geological formations on the island are of volcanic origin. +Topographic features include its highest peak, Edinburgh Peak (2,986 ft (910 m)), as well as Hags Tooth, Mount Rowett, Sea Elephant Bay, Quest Bay, and Hawkins Bay. +Surrounding Gough are small satellite islands and rocks, such as Southwest Island, Saddle Island (to the South), Tristiana Rock, Isolda Rock (West), Round Island, Cone Island, Lot's Wife, Church Rock (North), Penguin Island (Northeast), and The Admirals (East). +The average temperature is 12 °C (54 °F) while the average rainfall is 3,000 mm (120 in). Snow falls in the highlands in winter. + +=== Climate === +According to the Köppen system, Gough Island features an oceanic climate (Cfb). Gough Island's maximum temperatures are between 11 °C (52 °F) and 17 °C (63 °F) during the day year-round, due to its isolated position far out in the South Atlantic. As a result, summers are never hot and are highly susceptible to cold fronts. The Atlantic is much cooler in the southern hemisphere than in the northern, but frosts are still very rare due to heavy cloud cover. Precipitation is high throughout the year, and sunshine hours are few. Snow frequently falls on the peaks and plateau all year round (with occurrences of summer snow on the 900-metre peaks), but is uncommon at sea-level. + +== Fauna and flora == + +Gough and Inaccessible Island are a protected wildlife reserve, which has been designated a World Heritage Site by UNESCO. It has been described as one of the least disrupted ecosystems of its kind and one of the best shelters for nesting seabirds in the Atlantic. In particular, it is host to almost the entire world population of the Tristan albatross (Diomedea dabbenena) and the Atlantic petrel (Pterodroma incerta). The island is also home to the almost flightless Gough moorhen, and the critically endangered Gough bunting. + +=== Birds === + +The island has been identified as an Important Bird Area (IBA) by BirdLife International for its endemic landbirds and as a breeding site for seabirds. Birds for which the IBA has conservation significance include northern rockhopper penguins (30,000 breeding pairs), Tristan albatrosses (1,500–2,000 pairs), sooty albatrosses (5,000 pairs), Atlantic yellow-nosed albatrosses (5,000 pairs), broad-billed prions (1,750,000 pairs), Kerguelen petrels (20,000 pairs), soft-plumaged petrels (400,000 pairs), Atlantic petrels (900,000 pairs), great-winged petrels (5,000 pairs), grey petrels (10,000 pairs), great shearwaters (100,000 pairs), little shearwaters (10,000 pairs), grey-backed storm petrels (10,000 pairs), white-faced storm petrels (10,000 pairs), white-bellied storm petrels (10,000 pairs), Antarctic terns (500 pairs), southern skuas (500 pairs), Gough moorhens (2,500 pairs), and Gough buntings (3,000 individuals). + +=== Mammals === + +Southern right whales migrate around the island, but the only mammals on it not introduced by humans are subantarctic fur seals and southern elephant seals, both of which breed on the beaches. House mice, which most likely arrived with early sealing crews, are still present (see Invasive species below) and have grown to be much larger than elsewhere as an example of the island rule. + +=== Invasive species === + +==== Pearlwort (Sagina procumbens) ==== +In 1998, a number of procumbent pearlwort (Sagina procumbens) plants were found on the island which are capable of dramatically transforming the upland plant ecosystem (as it has on the Prince Edward Islands). Eradication efforts are ongoing but are expected to require years of 'concerted effort'. By 2010, through removing plants manually with some soil and then treating the area with boiling water, it had been restricted to one small area of coastal cliffs. As a result, the seed load had been reduced in a decade by 3 orders of magnitude. This nevertheless could result in 200 plants germinating per square metre. To reduce the population further, a study indicated that a combination of soil removal and herbicide could be effective. A report in 2020 noted that continued removal was still needed as well as biosecurity measures to avoid re-introduction. + +==== Other non-native plants ==== +By 2020 the following non-native plants with potential to become invasive had been recorded recently on the island: purpletop vervain (Verbena bonariensis), potato (Solanum tuberosum), common rush (Juncus effusus), black bent (Agrostis gigantea), cabbage (Brassica rapa) and Bermuda grass (Cynodon dactylon). \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Gough_Island-2.md b/data/en.wikipedia.org/wiki/Gough_Island-2.md new file mode 100644 index 000000000..8be027e3c --- /dev/null +++ b/data/en.wikipedia.org/wiki/Gough_Island-2.md @@ -0,0 +1,49 @@ +--- +title: "Gough Island" +chunk: 3/3 +source: "https://en.wikipedia.org/wiki/Gough_Island" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:38.207353+00:00" +instance: "kb-cron" +--- + +==== House mice ==== +In April 2007, researchers published evidence that predation by introduced house mice on seabird chicks is occurring at levels that might drive the Tristan albatross and the Atlantic petrel to extinction. As of October 2018, it is estimated that as many as 2,000,000 fewer eggs and chicks are being raised due to the impact of mice on the island, threatening the extinction of several species of seabirds that breed exclusively or nearly exclusively on Gough Island. +The Royal Society for the Protection of Birds (RSPB) awarded £62,000 by the UK government's Overseas Territories Environment Programme to fund additional research on the Gough Island mice and a feasibility study of how best to deal with them. This grant also paid for the assessment of a rat problem on Tristan da Cunha island. Trials for a method of eradicating the mice through baiting were commenced, and ultimately a £9.2 million eradication programme was planned, set to begin in 2020, with the island expected to be mouse-free by 2022. However, the start date was delayed until 2021 due to the COVID-19 pandemic. The programme used helicopters to drop cereal pellets containing the rodenticide brodifacoum. Gough has also been identified as the third-most important island in the world (out of 107 islands) to be targeted for the removal of non-native invasive mammals in order to save threatened species from extinction and to make major progress towards achieving global conservation targets. The proposed cull was criticised by the director of Animal Aid, stating, "We don't feel we have the right to choose some animals over others ... We don't agree with any culling for so-called conservation purposes. The conservation priority should be making sure wild spaces are protected, but allowing nature to do its thing." +As of December 2021, the head of the project to cull the population of mice considers this to have been a failure, since a living mouse was spotted after the completion of the project, which implied that there are other mice still alive on Gough. Nevertheless, the RSPB is planning a future restoration attempt by applying rodenticide bait, after doing some research to improve this operation. + +== Weather station == + +A weather station has been operating on Gough Island since 1956. It is operated as part of the network of the South African Weather Service. Because cold fronts approach South Africa from the south-west, the Gough station is particularly important in forecasting winter weather. Initially it was housed in the station at The Glen, but moved in 1963 to the southern lowlands of the island (near 40°21′0″S 9°52′50″W) for better data collection. + +=== Human presence === +Each year, a new overwintering team arrives by ship from Cape Town (since 2012, on the S. A. Agulhas II) to staff the weather station and perform scientific research. The team for a particular year may be termed as "Gough" and an expedition number: For example, the 1956 team was designated "Gough 01", and the team for 2013 was "Gough 58". Each new team directly replaces the departing one, thereby maintaining a continual human presence on the island. +A team normally consists of: + +A senior meteorologist +Two junior meteorologists +A radio technician +A medic +A diesel mechanic +A number of biologists (depending on ongoing research projects) +The team is supplied with enough food to last the whole year. People and cargo are landed either by helicopter, from a helideck-equipped supply ship, or by a fixed crane atop a cliff near the station (a place aptly called "Crane Point"). Several team members have died on the island. + +== Maps == + +== See also == +South African National Antarctic Programme – Government research programme +SANAE – South African National Antarctic Expedition +Marion Island – The larger of the Prince Edward Islands +S. A. Agulhas – South African ice-strengthened training ship and former polar research vessel +S. A. Agulhas II – Icebreaking polar supply and research ship +Nigel Morritt Wace – British Royal Marine, botanist and subantarctic guide + +== References == + +== External links == +www.goughisland.com – The Gough Island Restoration Project website +Gough Island Gallery +Facebook Groups – Gough Island team discussions +Gough and Inaccessible Islands – UNESCO wildlife reserve publication +Photographs of Gough Island – Flickr publication by Chantal van Staden. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/H._Paul_Shuch-0.md b/data/en.wikipedia.org/wiki/H._Paul_Shuch-0.md new file mode 100644 index 000000000..4ec3f9ae8 --- /dev/null +++ b/data/en.wikipedia.org/wiki/H._Paul_Shuch-0.md @@ -0,0 +1,42 @@ +--- +title: "H. Paul Shuch" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/H._Paul_Shuch" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:11.180038+00:00" +instance: "kb-cron" +--- + +H. Paul Shuch (born May 23, 1946) is an American scientist and engineer who has coordinated radio amateurs to help in the search for extraterrestrial intelligence (SETI). +Shuch, an aerospace engineer, microwave technologist, and radio amateur call sign N6TX, is believed by colleague Jack Unger to be the creator of the world's first commercial home satellite TV receiver. Recently a visiting professor at Lycoming College and Heidelberg University of Applied Sciences, Shuch continues to volunteer as the Executive Director Emeritus of The SETI League, Inc. He has taught physics, astronomy, and engineering on various university campuses for over four decades. He is also active in science fiction fandom and filk music. + + +== Early life == +Born Howard Paul Wakes in Chicago, Illinois, United States, Shuch later adopted the name of his stepfather, physicist Milton L. Shuch (12 Oct 1922–20 Jan 2014). +Shuch earned a Bachelor of Science in industrial technology from San Jose State University and a Doctor of Philosophy (Ph.D.) in engineering from the University of California, Berkeley. Shuch is a Vietnam War-era United States Air Force veteran and active instrument flight instructor. After his military career he worked as an engineer for several Silicon Valley aerospace companies before commencing his academic career. He founded Microcomm Consulting in 1975, where in 1978 he designed and produced a commercial home satellite television receiver. + + +== SETI activities == +Shuch first learned about Search for extraterrestrial intelligence (SETI), from Nicholas Marshall, W6OLO, a Hungarian engineer with whom he served on the Board of Project OSCAR, builders of the world's first non-Government satellite. Marshall introduced Shuch to longtime SETI proponent Bernard M. Oliver, then vice-president of Engineering at the Hewlett-Packard Company. Oliver in turn introduced Paul to SETI pioneers Frank Drake and Philip Morrison, who encouraged his continued interest and involvement in the development of SETI radio telescopes, as a spin-off from his design of early satellite TV receivers. +While in graduate school at the University of California, Berkeley, Shuch became acquainted with most of the members of the NASA SETI team in nearby Mountain View. Many SETI pioneers had been affiliated with Berkeley, either as faculty members, students, or postdoctoral researchers, and a SETI-friendly environment (some have called it a 'SETI cabal') persists there. Among Shuch's professors was the prominent radio astronomer William J. "Jack" Welch, a member of the National Academy of Sciences, who further encouraged Shuch's SETI activities. One of Shuch's classmates in Welch's radio telescope design course was Dan Werthimer, who went on to become chief scientist of the SETI@home distributed computing experiment. +When the NASA SETI program was cancelled by the United States Congress in 1993, New Jersey industrialist Richard Factor established the nonprofit, membership-supported SETI League, which he invited Shuch to head. Shuch became the organization's first Executive Director, a position he now holds on an emeritus basis. He designed the hardware and protocols for, and remains Principal Investigator on, the SETI League's Project Argus The SETI League, Inc.: Project Argus all-sky survey. +Shuch is principal investigator for the Invitation to ETI Invitation to ExtraTerrestrial Intelligence, a web-based SETI experiment initiated by his colleague, Allen Tough. Along with Ivan Almar of the Konkoly Observatory, Budapest, Shuch developed the San Marino Scale Wayback Machine, an analytical tool for quantifying the significance of transmissions from Earth into Space. + + +== Honors and awards == +1999 Fellow of the British Interplanetary Society +2007 Full Member of the International Academy of Astronautics + + +== References == + + +== External links == +IAA SETI Permanent Study Group +Invitation to ETI +Microcomm Consulting +Project Argus +San Marino Scale +SearchLites +SETI League \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Hydrogen_cyanide-0.md b/data/en.wikipedia.org/wiki/Hydrogen_cyanide-0.md new file mode 100644 index 000000000..011458518 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Hydrogen_cyanide-0.md @@ -0,0 +1,57 @@ +--- +title: "Hydrogen cyanide" +chunk: 1/3 +source: "https://en.wikipedia.org/wiki/Hydrogen_cyanide" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:53.459452+00:00" +instance: "kb-cron" +--- + +Hydrogen cyanide (also called prussic acid) is a chemical compound with the formula HCN and structural formula H−C≡N. It is a highly toxic and flammable liquid that boils slightly above room temperature, at 25.6 °C (78.1 °F). HCN is produced on an industrial scale and is a highly valued precursor to many chemical compounds ranging from polymers to pharmaceuticals. Large-scale applications are for the production of potassium cyanide and adiponitrile, used in mining and plastics, respectively. It is more toxic than solid cyanide compounds due to its volatile nature. A solution of hydrogen cyanide in water, represented as HCN(aq), is called hydrocyanic acid. The salts of the cyanide anion are known as cyanides. +Whether hydrogen cyanide is an organic compound or not is a topic of debate among chemists. It is traditionally considered inorganic, but can also be considered a nitrile, giving rise to its alternative names of methanenitrile and formonitrile. + +== Structure and general properties == +Hydrogen cyanide is a linear molecule, with a triple bond between carbon and nitrogen. The C-N bond length is 115 picometers. The isomer of HCN is HNC, hydrogen isocyanide. + +=== Odor === +About half of people are unable to detect the odor of hydrogen cyanide owing to a recessive genetic trait. For those that can detect it, the odor has been described as bitter almond-like. + +== Chemical properties == +Hydrogen cyanide is weakly acidic with a pKa of 9.2. It partially ionizes in water to give the cyanide anion, CN−. HCN forms hydrogen bonds with its conjugate base, species such as (CN−)(HCN)n. +In one of its principal uses, HCN reacts with alkenes to give nitriles. The conversion, which is called hydrocyanation, employs nickel complexes as catalysts. + +RCH=CH2 + HCN → RCH2−CH2CN +HCN is unstable with respect to self-condensation. Four molecules of HCN will tetramerize into diaminomaleonitrile. This and similar reactions have attracted attention with regards to their possible relevance to the origin of life. +Metal cyanides are typically prepared by salt metathesis from alkali metal cyanide salts, but mercuric cyanide is formed from aqueous hydrogen cyanide: + +HgO + 2 HCN → Hg(CN)2 + H2O + +== History of discovery and naming == +Hydrogen cyanide was first isolated in 1752 by French chemist Pierre Macquer who converted Prussian blue to an iron oxide plus a volatile component and found that these could be used to reconstitute it. The new component was what is now known as hydrogen cyanide. It was subsequently prepared from Prussian blue by the Swedish chemist Carl Wilhelm Scheele in 1782, and was eventually given the German name Blausäure (lit. "Blue acid") because of its acidic nature in water and its derivation from Prussian blue. In English, it became known popularly as prussic acid. +In 1787, the French chemist Claude Louis Berthollet showed that prussic acid did not contain oxygen, an important contribution to acid theory, which had hitherto postulated that acids must contain oxygen (hence the name of oxygen itself, which is derived from Greek elements that mean "acid-former" and are likewise calqued into German as Sauerstoff) and into Slavic languages, such as kyslík into Czech, or кислород into Russian. +In 1811, Joseph Louis Gay-Lussac prepared pure, liquified hydrogen cyanide, and in 1815 he deduced prussic acid's chemical formula. + +=== Etymology === +The word cyanide for the radical in hydrogen cyanide was derived from its French equivalent, cyanure, which Gay-Lussac constructed from the Ancient Greek word κύανος for dark blue enamel or lapis lazuli, again owing to the chemical’s derivation from Prussian blue. This Greek word is also the root of the English color name cyan. + +== Production and synthesis == +The most important process is the Andrussow oxidation invented by Leonid Andrussow at IG Farben in which methane and ammonia react in the presence of oxygen at about 1,200 °C (2,190 °F) over a platinum catalyst: + +2 CH4 + 2 NH3 + 3 O2 → 2 HCN + 6 H2O +In 2006, between 500 million and 1 billion pounds (between 230,000 and 450,000 t) were produced in the US. Hydrogen cyanide is produced in large quantities by several processes and is a recovered waste product from the manufacture of acrylonitrile. +Of lesser importance is the Degussa process (BMA process) in which no oxygen is added and the energy must be transferred indirectly through the reactor wall: + +CH4 + NH3 → HCN + 3 H2 +This reaction is akin to steam reforming, the reaction of methane and water to give carbon monoxide and hydrogen. +In the Shawinigan Process, hydrocarbons, e.g. propane, are reacted with ammonia. +In the laboratory, small amounts of HCN are produced by the addition of acids to cyanide salts of alkali metals: + +H+ + NaCN → HCN + Na+ +This reaction is sometimes the basis of accidental poisonings because the acid converts a nonvolatile cyanide salt into the gaseous HCN. +Hydrogen cyanide could be obtained from potassium ferricyanide and acid: + +6 H+ + [Fe(CN)6]3− → 6 HCN + Fe3+ + +=== Historical methods of production === +The large demand for cyanides for mining operations in the 1890s was met by George Thomas Beilby, who patented a method to produce hydrogen cyanide by passing ammonia over glowing coal in 1892. This method was used until Hamilton Castner in 1894 developed a synthesis starting from coal, ammonia, and sodium yielding sodium cyanide, which reacts with acid to form gaseous HCN. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Hydrogen_cyanide-1.md b/data/en.wikipedia.org/wiki/Hydrogen_cyanide-1.md new file mode 100644 index 000000000..e436217c7 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Hydrogen_cyanide-1.md @@ -0,0 +1,34 @@ +--- +title: "Hydrogen cyanide" +chunk: 2/3 +source: "https://en.wikipedia.org/wiki/Hydrogen_cyanide" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:53.459452+00:00" +instance: "kb-cron" +--- + +== Applications == +HCN is the precursor to sodium cyanide and potassium cyanide, which are used mainly in gold and silver mining and for the electroplating of those metals. Via the intermediacy of cyanohydrins, a variety of useful organic compounds are prepared from HCN including the monomer methyl methacrylate, from acetone, the amino acid methionine, via the Strecker synthesis, and the chelating agents EDTA and NTA. Via the hydrocyanation process, HCN is added to butadiene to give adiponitrile, a precursor to Nylon-6,6. +HCN is used globally as a fumigant against many species of pest insects that infest food production facilities. Both its efficacy and method of application lead to very small amounts of the fumigant being used compared to other toxic substances used for the same purpose. Using HCN as a fumigant also has less environmental impact, compared to some other fumigants such as sulfuryl fluoride, and methyl bromide. + +== Occurrence == +HCN is obtainable from fruits that have a pit, such as cherries, apricots, apples, and nuts such as bitter almonds, from which almond oil and extract is made. Many of these pits contain small amounts of cyanohydrins such as mandelonitrile and amygdalin, which slowly release hydrogen cyanide. One hundred grams of crushed apple seeds can yield about 70 mg of HCN. The roots of cassava plants contain cyanogenic glycosides such as linamarin, which decompose into HCN in yields of up to 370 mg per kilogram of fresh root. Some millipedes, such as Harpaphe haydeniana, Desmoxytes purpurosea, and Apheloria release hydrogen cyanide as a defense mechanism, as do certain insects, such as burnet moths and the larvae of Paropsisterna eucalyptus. Hydrogen cyanide is contained in the exhaust of vehicles, and in smoke from burning nitrogen-containing plastics. + +=== On Titan === +HCN has been measured in Titan's atmosphere by four instruments on the Cassini space probe, one instrument on Voyager, and one instrument on Earth. One of these measurements was in situ, where the Cassini spacecraft dipped between 1,000 and 1,100 km (620 and 680 mi) above Titan's surface to collect atmospheric gas for mass spectrometry analysis. HCN initially forms in Titan's atmosphere through the reaction of photochemically produced methane and nitrogen radicals which proceed through the H2CN intermediate, e.g., (CH3 + N → H2CN + H → HCN + H2). Ultraviolet radiation breaks HCN up into CN + H; however, CN is efficiently recycled back into HCN via the reaction CN + CH4 → HCN + CH3. + +=== On the young Earth === +It has been postulated that carbon from a cascade of asteroids (known as the Late Heavy Bombardment), resulting from interaction of Jupiter and Saturn, blasted the surface of young Earth and reacted with nitrogen in Earth's atmosphere to form HCN. + +=== In mammals === +Some authors have shown that neurons can produce hydrogen cyanide upon activation of their opioid receptors by endogenous or exogenous opioids. They have also shown that neuronal production of HCN activates NMDA receptors and plays a role in signal transduction between neuronal cells (neurotransmission). Moreover, increased endogenous neuronal HCN production under opioids was seemingly needed for adequate opioid analgesia, as analgesic action of opioids was attenuated by HCN scavengers. They considered endogenous HCN to be a neuromodulator. +It has also been shown that, while stimulating muscarinic cholinergic receptors in cultured pheochromocytoma cells increases HCN production, in a living organism (in vivo) muscarinic cholinergic stimulation actually decreases HCN production. +Leukocytes generate HCN during phagocytosis, and can kill bacteria, fungi, and other pathogens by generating several different toxic chemicals, one of which is hydrogen cyanide. +The vasodilatation caused by sodium nitroprusside has been shown to be mediated not only by NO generation, but also by endogenous cyanide generation, which adds not only toxicity, but also some additional antihypertensive efficacy compared to nitroglycerine and other non-cyanogenic nitrates which do not cause blood cyanide levels to rise. +HCN is a constituent of tobacco smoke. + +=== HCN and the origin of life === +As a precursor to amino acids and nucleic acids, hydrogen cyanide has been proposed to have played a part in the origin of life. Compounds of special interest are oligomers of HCN including its trimer aminomalononitrile and tetramer diaminomaleonitrile, which can be described as (HCN)3 and (HCN)4, respectively. Although the relationship of these chemical reactions to the origin of life theory remains speculative, studies in this area uncovered new pathways to organic compounds derived from the condensation of HCN (e.g. adenine). + +=== In space === \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Hydrogen_cyanide-2.md b/data/en.wikipedia.org/wiki/Hydrogen_cyanide-2.md new file mode 100644 index 000000000..66f7be5e7 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Hydrogen_cyanide-2.md @@ -0,0 +1,39 @@ +--- +title: "Hydrogen cyanide" +chunk: 3/3 +source: "https://en.wikipedia.org/wiki/Hydrogen_cyanide" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:53.459452+00:00" +instance: "kb-cron" +--- + +Because hydrogen cyanide is a precursor to nucleic acids, which are critical for terrestrial life, astronomers are incentivized to search for derivatives of HCN. +HCN has been detected in the interstellar medium and in the atmospheres of carbon stars. Since then, extensive studies have probed formation and destruction pathways of HCN in various environments and examined its use as a tracer for a variety of astronomical species and processes. HCN can be observed from ground-based telescopes through a number of atmospheric windows. The J=1→0, J=3→2, J= 4→3, and J=10→9 pure rotational transitions have all been observed. +HCN is formed in interstellar clouds through one of two major pathways: via a neutral-neutral reaction (CH2 + N → HCN + H) and via dissociative recombination (HCNH+ + e− → HCN + H). The dissociative recombination pathway is dominant by 30%; however, the HCNH+ must be in its linear form. Dissociative recombination with its structural isomer, H2NC+, exclusively produces hydrogen isocyanide (HNC). +HCN is destroyed in interstellar clouds through a number of mechanisms depending on the location in the cloud. In photon-dominated regions (PDRs), photodissociation dominates, producing CN (HCN + ν → CN + H). At further depths, photodissociation by cosmic rays dominate, producing CN (HCN + cr → CN + H). In the dark core, two competing mechanisms destroy it, forming HCN+ and HCNH+ (HCN + H+ → HCN+ + H; HCN + HCO+ → HCNH+ + CO). The reaction with HCO+ dominates by a factor of ~3.5. HCN has been used to analyze a variety of species and processes in the interstellar medium. It has been suggested as a tracer for dense molecular gas and as a tracer of stellar inflow in high-mass star-forming regions. Further, the HNC/HCN ratio has been shown to be an excellent method for distinguishing between PDRs and X-ray-dominated regions (XDRs). +On 11 August 2014, astronomers released studies, using the Atacama Large Millimeter/Submillimeter Array (ALMA) for the first time, that detailed the distribution of HCN, HNC, H2CO, and dust inside the comae of comets C/2012 F6 (Lemmon) and C/2012 S1 (ISON). +In February 2016, it was announced that traces of hydrogen cyanide were found in the atmosphere of the hot super-Earth 55 Cancri e with NASA's Hubble Space Telescope. +On 14 December 2023, astronomers reported the first-time discovery, in the plumes of Saturn's sixth-largest moon Enceladus, hydrogen cyanide, a possible chemical essential for life as we know it, as well as other organic molecules, some of which are yet to be better identified and understood. According to the researchers, "these [newly discovered] compounds could potentially support extant microbial communities or drive complex organic synthesis leading to the origin of life." + +== As a poison and chemical weapon == + +In World War I, hydrogen cyanide was used by the French from 1916 as a chemical weapon against the Central Powers, and by the United States and Italy in 1918. It was not found to be effective enough due to weather conditions. The gas is lighter than air and rapidly disperses up into the atmosphere. Rapid dilution made its use in the field impractical. In contrast, denser agents such as phosgene or chlorine tended to remain at ground level and sank into the trenches of the Western Front's battlefields. Compared to such agents, hydrogen cyanide had to be present in higher concentrations in order to be fatal. To increase gas persistence, it was mixed with smoke producing compounds. For example, French composition called Vincennite combined 50% hydrogen cyanide with 30% arsenic trichloride and 15% stannic chloride for smoke production, plus 5% chloroform. +A hydrogen cyanide concentration of 100–200 ppm in breathing air will kill a human within 10 to 60 minutes. A hydrogen cyanide concentration of 2000 ppm (about 2380 mg/m3) will kill a human in about one minute. The toxic effect is caused by the action of the cyanide ion, which halts cellular respiration. It acts as a non-competitive inhibitor for an enzyme in mitochondria called cytochrome c oxidase. As such, hydrogen cyanide is commonly listed among chemical weapons as a blood agent. +The Chemical Weapons Convention lists it under Schedule 3 as a potential weapon which has large-scale industrial uses. Signatory countries must declare manufacturing plants that produce more than 30 metric tons per year, and allow inspection by the Organisation for the Prohibition of Chemical Weapons. +Perhaps its most infamous use is Zyklon B (German: Cyclone B, with the B standing for Blausäure – prussic acid; also, to distinguish it from an earlier product later known as Zyklon A), used in the Nazi German extermination camps of Majdanek and Auschwitz-Birkenau during World War II to kill Jews and other persecuted minorities en masse as part of their Final Solution genocide program. Hydrogen cyanide was also used in the camps for delousing clothing in attempts to eradicate diseases carried by lice and other parasites. One of the original Czech producers continued making Zyklon B under the trademark "Uragan D2" until around 2015. +During World War II, the US considered using it, along with cyanogen chloride and mustard gas, as part of Operation Downfall, the planned invasion of Japan, but President Harry Truman decided against it, instead using the atomic bombs developed by the secret Manhattan Project. +Hydrogen cyanide was also the agent employed in judicial execution in some U.S. states, where it was produced during the execution by the action of sulfuric acid on sodium cyanide or potassium cyanide. +Under the name prussic acid, HCN has been used as a killing agent in whaling harpoons, though it was quickly abandoned for being dangerous to the crew. From the middle of the 18th century it was used in a number of poisoning murders and suicides. +Hydrogen cyanide gas in air is explosive at concentrations above 5.6%. + +== References == + +== External links == +Institut national de recherche et de sécurité (1997). "Cyanure d'hydrogène et solutions aqueuses". Fiche toxicologique n° 4, Paris:INRS, 5pp. (PDF file, in French) +International Chemical Safety Card 0492 +Hydrogen cyanide and cyanides (CICAD 61) +National Pollutant Inventory: Cyanide compounds fact sheet +NIOSH Pocket Guide to Chemical Hazards +Department of health review +Density of Hydrogen Cyanide gas \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Iosif_Shklovsky-0.md b/data/en.wikipedia.org/wiki/Iosif_Shklovsky-0.md new file mode 100644 index 000000000..80017307f --- /dev/null +++ b/data/en.wikipedia.org/wiki/Iosif_Shklovsky-0.md @@ -0,0 +1,55 @@ +--- +title: "Iosif Shklovsky" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Iosif_Shklovsky" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:08.689092+00:00" +instance: "kb-cron" +--- + +Iosif Samuilovich Shklovsky (sometimes transliterated Josif, Josif, Shklovskii, Shklovskij; Russian: Ио́сиф Самуи́лович Шкло́вский; 1 July 1916 – 3 March 1985) was a Soviet astronomer and astrophysicist. He is remembered for his work in theoretical astrophysics and other topics, as well as for his 1962 book on extraterrestrial life, the revised and expanded version of which was co-authored by American astronomer Carl Sagan in 1966 as Intelligent Life in the Universe. +He won the Lenin Prize in 1960 and the Bruce Medal in 1972. Asteroid 2849 Shklovskij and the crater Shklovsky (on the Martian moon Phobos) are named in his honor. He was a Corresponding Member of Soviet Academy of Sciences since 1966. + + +== Early life == +Shklovsky was born in Hlukhiv, a city now located in modern Ukraine, at the time a part of the Russian Empire, into a poor Ukrainian Jewish family. After graduating from the seven-year secondary school, he worked as a foreman on building Baikal Amur Mainline. In 1933 Shklovsky entered the Physico-Mathematical Faculty of the Moscow State University. +There he studied until 1938, when he took a Postgraduate Course at the Astrophysics Department of the Sternberg State Astronomical Institute and remained working in the Institute until the end of his life. He died in Moscow, aged 68. + + +== Research == +He specialized in theoretical astrophysics and radio astronomy, as well as the Sun's corona, supernovae, and cosmic rays and their origins. He showed, in 1946, that the radio-wave radiation from the Sun emanates from the ionized layers of its corona, and he developed a mathematical method for discriminating between thermal and nonthermal radio waves in the Milky Way. He is noted especially for his suggestion that the radiation from the Crab Nebula is due to synchrotron radiation, in which unusually energetic electrons twist through magnetic fields at speeds close to that of light. Shklovsky proposed that cosmic rays from supernova explosions within 300 light years of the sun could have been responsible for some of the mass extinctions of life on earth. +In 1959, Shklovsky examined the orbital motion of Mars's inner satellite Phobos. He concluded that its orbit was decaying, and noted that if this decay was attributed to friction with the Martian atmosphere, then the satellite must have an exceptionally low density. In this context, he voiced a suggestion that Phobos might be hollow, and possibly of artificial origin. This interpretation has since been refuted by more detailed study, but the apparent suggestion of extraterrestrial involvement caught the public imagination, though there is some disagreement as to how seriously Shklovsky intended the idea to be taken. However, Shklovsky and Carl Sagan argued for serious consideration of "paleocontact" with extraterrestrials in the early historical era, and for examination of myths and religious lore for evidence of such contact. + +His 1962 book, Вселенная, жизнь, разум (Universe, Life, Intelligence), was expanded upon and re-issued in 1966 with American astronomer Carl Sagan as co-author under the title Intelligent Life in the Universe (1966). This was the first comprehensive discussion of this field. Discussing the biological as well as astronomical issues of the subject, its unique format, alternating paragraphs written by Shklovsky and Sagan, demonstrated the deep mutual regard between the two and allowed them to express their views without compromise. +In 1967, before the discovery of pulsars, Shklovsky examined the X-ray and optical observations of Scorpius X-1 and correctly concluded that the radiation comes from an accreting neutron star. + + +== Quotes == +In the September 1965 issue of Soviet Life, he made the following statement regarding prospects for the future of humanity: + +Profound crises lie in wait for a developing civilization and one of them may well prove fatal. We are already familiar with several such critical (situations): +(a) Self-destruction as a result of a thermonuclear catastrophe or some other discovery which may have unpredictable and uncontrollable consequences. +(b) Genetic danger. +(c) Overproduction of information. +(d) Restricted capacity of the individual's brain which can lead to excessive specialization, with consequent dangers of degeneration. +(e) A crisis precipitated by the creation of artificial intelligent beings. + + +== Personal life == +His memoir, Five Billion Vodka Bottles to the Moon: Tales of a Soviet Scientist, was published posthumously in 1991 by W.W. Norton & Co. +In "Five Billion Vodka Bottles to the Moon", Shklovsky recalled his visit to Philip Morrison, who in 1959 had co-authored with Cornell University colleague Giuseppe Cocconi the paper in Nature magazine which marks the beginning of the modern search for extraterrestrial life, and their discussion of such issues. Bitter over Soviet anti-semitism, of the five pioneer investigators of the field, Cocconi, Morrison, Cornell University's Frank Drake (of the 1961 Project Ozma and the Drake equation), Sagan, and Shklovsky, Shklovsky was quite aware of sharing his Jewish identity with Sagan. Indeed, Sagan's Jewish heritage was also Ukrainian Jewish. +He was known for his sharp wit and extreme likability. Colleagues in the astronomy department at the University of California, Berkeley, remember fondly his visit there in the 1970s. Well known for his Intelligent Life in the Universe, he was asked by a graduate student if UFO sightings are as common in the Soviet Union as in the United States. "No," he replied. "In this area the Americans are far more advanced than us." + + +== Bibliography == +I.S. Shklovsky: Cosmic Radio Waves, Cambridge, Harvard University Press, 1960 +I.S. Shklovsky: Вселенная, жизнь, разум (English: Universe, Life, Intelligence), Moscow, USSR Academy of Sciences Publisher, 1962 +Revised and extended English translation of this book, coauthored with Carl Sagan, was first published in 1966, under the name Intelligent Life in the Universe, one of the latest reissues was published in 1998 by Emerson-Adams Press (ISBN 1-892803-02-X) +I.S. Shklovsky: Physics of the Solar Corona, Pergamon Press, Oxford, UK, 1965 +I.S. Shklovskii, Supernovae, New York: Wiley, 1968 +I.S. Shklovsky: Stars: Their Birth, Life, Death, San Francisco, 1978, ISBN 0-7167-0024-7 +I.S. Shklovsky: Five Billion Vodka Bottles to the Moon: Tales of a Soviet Scientist, W.W. Norton & Company, 1991. + + +== References == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Jaslyk_Prison-0.md b/data/en.wikipedia.org/wiki/Jaslyk_Prison-0.md new file mode 100644 index 000000000..d21245f33 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Jaslyk_Prison-0.md @@ -0,0 +1,21 @@ +--- +title: "Jaslyk Prison" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Jaslyk_Prison" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:54.684858+00:00" +instance: "kb-cron" +--- + +Jaslyk Prison (Uzbek: Jasliq, Жаслиқ, [d͡ʒasˈlək]) was a detention facility in Jasliq, Karakalpakstan in north-west Uzbekistan where human rights activists and ex-inmates alleged that torture was widespread. Former prisoners include Muzafar Avazov, who was apparently boiled to death. +The prison, officially known by the codename UYA 64/71, was located in a former Soviet military base once used for testing chemical warfare protection equipment. It was established in 1999. The prison was opened to contain thousands of people arrested following bombings in the capital, Tashkent, and as of 2012 held 5,000–7,000 people according to Human Rights Watch. +The prison was shut down by Uzbekistan's president, Shavkat Mirziyoyev, in September 2019. + + +== References == + + +== External links == +IWPR report Archived 2011-01-22 at the Wayback Machine +Human Rights Watch report Archived 2007-09-29 at the Wayback Machine \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Jill_Tarter-0.md b/data/en.wikipedia.org/wiki/Jill_Tarter-0.md new file mode 100644 index 000000000..268912738 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Jill_Tarter-0.md @@ -0,0 +1,62 @@ +--- +title: "Jill Tarter" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Jill_Tarter" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:13.689446+00:00" +instance: "kb-cron" +--- + +Jill Cornell Tarter (born January 16, 1944) is an American astronomer who works on the search for extraterrestrial intelligence (SETI). Tarter is the former director of the Center for SETI Research, holding the Bernard M. Oliver Chair for SETI at the SETI Institute. +In 2002, Discover magazine recognized her as one of the 50 most important women in science. + + +== Early life and education == +Tarter grew up in New York State, and graduated from Eastchester High School in 1961. She was elected to its alumni association hall of fame in 2001. Prior to his death when she was twelve years old, Tarter's father was an early inspiration who encouraged her curiosity when she resisted suggestions that she follow pursuits considered more appropriate for a girl and announced that she wanted to be an engineer. On family trips to Florida with her father, she would look up at the dark skies and wonder who or what might be out there. +Tarter earned a Bachelor of Engineering Physics degree as an undergraduate at Cornell University (1965) as the only woman in her graduating class of 300 in the engineering college. Her professional interest in astronomy emerged as she pursued a Master's degree (1971) and PhD (1975) at the University of California at Berkeley. In her PhD dissertation, she coined the term "brown dwarf" while researching small-mass objects that fail to stably fuse hydrogen. + + +== Astronomy career == + +Tarter has worked on a number of major scientific projects, most relating to the search for extraterrestrial life. As a graduate student, she was inspired to do SETI research by the Cyclops Report. Stuart Bowyer gave her the report to read when Bowyer discovered that Tarter could program the then-outdated PDP-8/S computer that had been donated by Jack Welch for Bowyer's SETI project at Hat Creek Radio Observatory. She worked with Bowyer on the radio-search project SERENDIP and created the corresponding backronym, "Search for Extraterrestrial Radio Emissions from Nearby Developed Intelligent Populations". She was project scientist for NASA's High Resolution Microwave Survey (HRMS) in 1992 and 1993 and subsequently director of Project Phoenix (HRMS reconfigured) under the auspices of the SETI Institute. She was co-creator with Margaret Turnbull of the HabCat in 2002, a principal component of Project Phoenix. Tarter has published dozens of technical papers and lectures extensively both on the search for extraterrestrial intelligence and the need for proper science education. She had spent 35 years in the quest for extraterrestrial life when she announced her retirement in 2012. +On October 20, 2006, Tarter appeared on the Point of Inquiry podcast to discuss the question: "Are we alone?" Tarter stated, "Humans will have a different view about being human if and when we know the answer to the 'Are we alone?' question." +In 2011, Tarter delivered a talk, "Intelligent Life in the Universe: Is Anybody Out There?", at the first Starmus Festival in the Canary Islands. The Festival, founded by astronomer Garik Israelian, was a blend of astronomy, allied sciences, music, and art. Tarter subsequently joined the Starmus Board of Directors, along with Israelian, astrophysicist and Queen founding guitarist Brian May, theoretical physicist Stephen Hawking, evolutionary biologist Richard Dawkins, and others. Her 2011 talk was published in the book Starmus: 50 Years of Man in Space. Tarter is a member of the CuriosityStream Advisory Board and the Space for Humanity Board of Advisors. +In May 2013, the Science Laureates of the United States Act of 2013 was introduced into Congress. Tarter was listed by one commentator as a possible nominee for the position of Science Laureate, if the act were to pass. +In 2017, science journalist Sarah Scoles published a biography of Tarter and a history of SETI, called Making Contact: Jill Tarter and the Search for Extraterrestrial Intelligence. + + +== Honors and awards == +Tarter's work in astrobiology and her success as a female scientist have garnered achievement awards from a number of scientific organizations. + +Awarded a Lifetime Achievement Award by Women in Aerospace in 1989. +Elected a Fellow of the Committee for Skeptical Inquiry in 1994. +Chabot Observatory named her their person of the year in 1997. +Was awarded the Telluride Tech Festival Award of Technology in 2001. +Was elected a Fellow of the American Association for the Advancement of Science in 2002 and a Fellow of the California Academy of Sciences in 2003. +Received the Adler Planetarium Women in Space Science Award in 2003. +Was named one of the 100 most influential people in the world by Time Magazine in 2004. +Received two public service medals from NASA. +Asteroid 74824 Tarter (1999 TJ16) was named and approved by the International Astronomical Union’s Small Bodies Naming Committee in 2005. +Received Wonderfest's Carl Sagan Prize for Science Popularization in 2005. +Recipient of a 2009 TED Prize. +Elected a Legacy Fellow of the American Astronomical Society in 2020. +Elected a member of the American Academy of Arts and Sciences in 2021. + + +== Popular culture == +Tarter's astronomical work is illustrated in Carl Sagan's novel Contact. In the film version of Contact, the protagonist Ellie Arroway is played by Jodie Foster. Tarter conversed with the actress for months before and during filming, and Arroway was "largely based" on Tarter's work. She has also been featured in John Boswell's Symphony of Science music video, "The Poetry of Reality (An Anthem for Science)". +Prior to Seticon II in 2012 Tarter addressed concerns about alien invasion, like those seen in science fiction films, in particular those expressed by Stephen Hawking. Correlated with Hawking's reservations is his belief that humans should not attempt to broadcast signals in order to contact alien civilizations (Active SETI). Tarter thinks that aliens evolved enough to communicate with and travel to Earth will be long-lived enough to have needed to grow beyond violent tendencies. + +“Often the aliens of science fiction say more about us than they do about themselves.... While Sir [sic] Stephen Hawking warned that alien life might try to conquer or colonize Earth, I respectfully disagree. If aliens were able to visit Earth that would mean they would have technological capabilities sophisticated enough not to need slaves, food, or other planets. If aliens were to come here it would be simply to explore. Considering the age of the Universe, we probably wouldn’t be their first extraterrestrial encounter, either. We should look at movies like ‘Men in Black III,’ ‘Prometheus’ and ‘Battleship’ as great entertainment and metaphors for our own fears, but we should not consider them harbingers of alien visitation.” + + +== References == + + +== External links == + +Tarter featured at Creative Class +Lecture about long-term SETI strategies presented to the Long Now Foundation (Ogg Vorbis format). +Talk on the Allen Telescope Array at the Silicon Valley Astronomy Lectures on YouTube +'It Takes a Cosmos to Make a Human' Jill Tarter interviewed by Krista Tippett of The On Being Project, 2021; audio with transcript. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-0.md b/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-0.md index 4922ea48b..bd1d6e8d4 100644 --- a/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-0.md +++ b/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-0.md @@ -4,7 +4,7 @@ chunk: 1/4 source: "https://en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T12:43:37.379517+00:00" +date_saved: "2026-05-05T13:18:32.966259+00:00" instance: "kb-cron" --- diff --git a/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-1.md b/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-1.md index 74e550163..6644d30d8 100644 --- a/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-1.md +++ b/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-1.md @@ -4,7 +4,7 @@ chunk: 2/4 source: "https://en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T12:43:37.379517+00:00" +date_saved: "2026-05-05T13:18:32.966259+00:00" instance: "kb-cron" --- diff --git a/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-2.md b/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-2.md index 9d9a11467..f797c1789 100644 --- a/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-2.md +++ b/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-2.md @@ -4,7 +4,7 @@ chunk: 3/4 source: "https://en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T12:43:37.379517+00:00" +date_saved: "2026-05-05T13:18:32.966259+00:00" instance: "kb-cron" --- diff --git a/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-3.md b/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-3.md index d65e9f5a5..aae7bf718 100644 --- a/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-3.md +++ b/data/en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer-3.md @@ -4,7 +4,7 @@ chunk: 4/4 source: "https://en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T12:43:37.379517+00:00" +date_saved: "2026-05-05T13:18:32.966259+00:00" instance: "kb-cron" --- diff --git a/data/en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction-0.md b/data/en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction-0.md new file mode 100644 index 000000000..e79c707c6 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction-0.md @@ -0,0 +1,33 @@ +--- +title: "Kazakhstan and weapons of mass destruction" +chunk: 1/4 +source: "https://en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:55.900179+00:00" +instance: "kb-cron" +--- + +The Republic of Kazakhstan, once a republic of the Soviet Union, was a primary venue for Soviet nuclear weapon testing from 1949 until 1989. Following the collapse of the Union of Soviet Socialist Republics (USSR) in 1991, Kazakhstan became the fourth-largest nuclear power (following Ukraine) in the world and hosted a considerably large weapon support infrastructure due to its reliance on the Soviet nuclear program as a means to develop its own local economy. Besides the nuclear program, Kazakhstan was also a prominent site of Soviet programs of biological (only Biopreparat outside of Russia) and chemical weapons. +The former Soviet Union conducted substantial, large scale nuclear testing at the Semipalatinsk-21 Test Site, whose radiological impact on the environment has resulted in numerous health issues for the population. The Nevada Semipalatinsk movement helped report the cancer-related issues which are examined through the inhabitants living and exposed to villages around Semipalatinsk. +Kazakhstan was the last Soviet republic to declare independence from the Soviet Union, doing so on 16 December 1991. Due to concerns of the spread of cancer to its population, it engaged in rapid denuclearization with help from the United States. Over the years, Kazakhstan has cooperated with Russia in returning all 1,400 active nuclear warheads, and took on a leading role in declaring the Central Asian Nuclear Weapon Free Zone. In 2017, Kazakhstan voted for the Treaty on the Prohibition of Nuclear Weapons and ratified it in 2021. + +== Origins == + +=== Nuclear testing venue === + +On 21 August 1947, the Soviet government established a town, (Kurchatov), in the north-eastern part of the Soviet-managed Kazakhstan to support the Semipalatinsk-21 site as the primary testing venue for Soviet program of nuclear weapons— the first Soviet device, RDS-1, was carried out on 29 August 1949. The Kurchatov is situated in the east of Semipalatinsk (now Semey), a region that once conveyed a sacred cultural meaning to local Kazakhstanis with its production of many Kazakhstani writers and musicians. The Semipalatinsk-21 (in Russian: Полигон, lit. Polygon) held 18,300 square kilometres (7,100 sq mi) of vast but relatively remote grassland territory, where the Soviets conducted weapon testing at very large scale on a four major testing venues with two research reactors. For the 40 years, the Semipalatinsk-21 was kept as a former Soviet nuclear testing venue where the nuclear weapon testings (456 nuclear explosive operations were conducted with 116 atmospheric nuclear tests (in air and on surface) taking place at the "Experiential Field" between 1949 and 1963) without the regard of the environmental safety or public health concerns for the local Kazakhs. +With the enforcement of the Partial Test Ban Treaty (PTBT) in 1963, the Soviet program managers began conducting underground nuclear testing and slowly moved the weapon testing infrastructure to Novaya Zemlya, which is north of the Russia. Opposition by local Kazakhs, the Soviets conducted the last test at Semipalatinsk-21 took place in November 1989 and left an active nuclear warhead in 1990 after the collapse of the Soviet Union in 1991, as Kazakhstan inheriting the Semipalatinsk-21 along with Baikonur. +As of current, the Semipalatinsk-21 is overseen by the National Nuclear Center of Kazakhstan with focused on the site's peaceful conservation and its mission is to provide scientific-technical support in areas covering: nuclear power development in Kazakhstan, development of fusion technologies, radiation ecology in Kazakhstan, non-proliferation regime support, and information and staff support in the nuclear industry. + +==== Nevada Semipalatinsk movement ==== + +The Glasnost' (Russian:Гласность) initiatives led by former Soviet President Mikhail Gorbachev in 1986 provided the Kazakhstani people to demand the halt of the Soviet nuclear testing, and it gained more public support when the news of possible radioactive contaminants the testing site emitted became public in 1989. +Named as Nevada Semipalatinsk led by Kazakh activist, Olzhas Suleimenov, successfully halted the Soviet nuclear testing in Semey and it played a positive role in promoting public understanding of "the necessity to fight against nuclear threats and finding solutions to global ecological problems", according to UNESCO. +Between 1989 and 1992, Kazakh activists toured the United States with the Nevada Desert Experience in hopes of spreading awareness about the detrimental and radioactive effects of nuclear testing. At the same time, the Western Shoshone, the Native American tribes of the Great Basin, was also working on attempts to reclaim their land, "Newe Sogobia", which is located in the adjacent areas of American nuclear test site known as Nevada Test Site (NTS). Inspired by this, Kazakhs and American activists worked in collaboration through political engagements and exchanged delegates. Following similar timelines, the antinuclear movement was successful in pressuring Kazakh government to close Semipalatinsk-21 in 1991 as well as the U.S. Congress in halting the testing at the Nevada Test Site in 1992. + +==== The Kazakhstani cooperation with the United States ==== +On 29 August 1991, the Semipalatinsk-21 was officially closed by the Kazakhstani government as the United States, through its Department of Defense, engage in a mission with the objective of enabling further protection nuclear installations and their safe decommissioning. +The American Defense Threat Reduction Agency (DTRA) worked closely with the Kazakhstani agencies in a joint project known as the Kazakhstani-United States Cooperative Threat Reduction (KUSCTR) project which lasted about 26 years, that safely decommissioning the Semipalatinsk-21 facilities. As a result, the Americans aided the Kazakhstanis in the initiative to safely destroy all nuclear testing infrastructure and in 2000, a final explosion at Semipalatinsk-21 was carried out to destroy its infrastructure. + +== Deweaponization == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction-1.md b/data/en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction-1.md new file mode 100644 index 000000000..e3dacf6e7 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction-1.md @@ -0,0 +1,27 @@ +--- +title: "Kazakhstan and weapons of mass destruction" +chunk: 2/4 +source: "https://en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:55.900179+00:00" +instance: "kb-cron" +--- + +On 16 December 1991, Kazakhstan declared independence from the Soviet Union (ten days before its disintegration), Kazakhstan suddenly inherited, along with Ukraine, the largest stockpiles of nuclear weapons. Besides nuclear testing site, Kazakhstan was the most significant site for Soviet military where its biological weapons program under Ken Alibek was based in Stepnogorsk, and chemical weapons were being manufactured in Pavlodar. +Following Ukraine, Kazakhstan became the fourth largest nuclear state with 1,400 nuclear warheads mounted on the 108 or 147 (sources vary) SS-18 ICBMs. In addition, Kazakhstani military also had 40 Tupolev Tu-95 bombers equipped with 320 cruise missiles and hundreds of nuclear weapon support infrastructure. Fear of nuclear proliferation particularly attracted the international attention due to unsubstantiated rumors reported the sale of nuclear warheads to Iran, which was pursuing its own nuclear program. Despite the growing fears of Iranian acquisition of former Soviet nuclear warheads, the operational command and control of these weapon system had remained under the Russian Rocket Forces in Moscow. +With Semipalatinsk-21 site, Kazakhstan also inherited the Baikonur, which Russia debated for the control until agreeing to give ownership to Kazakhstan in 1994. +With aging weapon infrastructure and widely reported cancer cases, the Kazakhstani government reached an understanding to denuclearize its territory by returning all nuclear warheads to Russian Federation in 1994 after signing to legal Alma-Ata Protocol in 1991. On 29 August 1991, the Kazakhstani government closed the former Soviet Semipalatinsk nuclear testing site. In 1992, Kazakhstan further committed to acceding to the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) as non-nuclear weapons states that would not develop, possess, or control nuclear weapon as soon as possible, which they were able to do on 13 December 1993. They also accepted the International Atomic Energy Agency (IAEA) safeguards and assisted in drafting the Central Asia Nuclear Weapons Free Zone Treaty (CANWFZ). + +== Legacies == + +=== Health effects === +In understanding the way these nuclear tests have affected populations, Kazakh authorities have run into challenges due to lack of data that would outline the happenings at the Semipalatinsk Nuclear Test Site (SNTS), and the difficulty of measuring radiation. It is also argued that much of the challenge also stemmed from the restriction of available information on health data that the Soviet military and health institutions collected at the time. In addition to this, health studies surrounding the test site started relatively late, making it difficult to trace the early effects of irradiation. +Despite this, there has been an expressed concern from local health authorities regarding radiation health effects and cancer. Conducted by Bauer, et al. in the 1960s was an analysis of a cohort study that included 19,545 inhabitants of exposed and comparison villages around Semipalatinsk that would confirm the detrimental effect of radiation to health. In their examination of mortality over the 40 years of data collecting, they have found large differences between the two sample populations in which the rate of mortality and cancer was far larger in the exposed group than the comparison group. The most common cancers found within the exposed group were traces of cancer in tumors, lung cancer, stomach cancer, breast cancer, and esophageal cancer in women. +Possible indicators of early acute effects (1950–1960) have also been identified: + +High infant mortality rate: 100-110 cases per 1000 infants were known to have been affected in areas that were most exposed. +Congenital malformations: understood to be more frequent in groups that were exposed. Most common types were congenital malformations of the nervous system and facial malformations. +Leukemia: frequency of leukemia found in children doubled between 1945 and 1948. +In terms of long term early effects, in addition to the increase of mortality and cancer, cardiovascular diseases were more prevalent in the exposed group where the level of cardiovascular disease among 40-49 year-olds was comparable to the levels typically found in 50-59 year old's in the comparison group. Rates of mortality due to cardiovascular disease were also higher in the exposed group. Women who were exposed to radiation in childhood also experienced malformations among their children upon birth. This is proven to be due to the effects of nuclear testing radiation as following 1985, the rates of malformation in children dropped, possibly due to a new generation of mothers who have not been exposed to the radiation. +Indicators of late long-term effects (1985–2010) include premature aging: examined through a five-year study conducted in 2000-2005 where the diagnosis for several types of cancers in exposed populations were 6 – 9 years lower than in unexposed populations. On average, life expectancy was also inevitably lower in exposed populations. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction-2.md b/data/en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction-2.md new file mode 100644 index 000000000..e2622995c --- /dev/null +++ b/data/en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction-2.md @@ -0,0 +1,38 @@ +--- +title: "Kazakhstan and weapons of mass destruction" +chunk: 3/4 +source: "https://en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:55.900179+00:00" +instance: "kb-cron" +--- + +=== Politics === +Since its independence, Kazakhstan has been determined to turn its military heritage and scars to a new purpose of fostering a peaceful nuclear industry and use the technological foundations to build a civilian nuclear sector capable of boosting its economy whilst, on the international stage, pursuing non-proliferation diplomacy. Since its independence, Kazakhstan acted as a model state by cooperating with the removal of its nuclear arsenal whilst fully adopting non-proliferation norms and treaties. Nonetheless, locally, the nation has not been able to use nuclear material for peaceful uses such as setting up a nuclear energy program due to the negative public sentiment towards it due to historical accidents. +More recently, Kazakhstan has been one of the strongest players on pushing a global ban on nuclear weapons whilst being keen on the peaceful use of nuclear technology. Therefore, notably Kazakhstan was one of the first fifty countries to sign and ratify the Treaty on the Prohibition of Nuclear Weapons, which was symbolically ratified on the 70th anniversary of the first Soviet nuclear test in Kazakh soil. Kazakhstan has also taken softer diplomatic measures to promote its non-proliferation objective and increase the outreach of its policy. For example, the Kazakh government condemned China's nuclear testing program in 1995. In 2009, by President Nazarbayev’s initiative, the UN proclaimed UNGA Resolution 64/35 that declared 29 August as the International Day of Nuclear Weapons Renunciation. Finally, President Nazarbayev urged the international community "to make the building of a nuclear-weapon-free world the main goal of humanity in the 21st century" during the General Debate of the UNGA in September 2015, followed by the tabling of resolution 70/57 to establish a Universal Declaration for the Achievement of a Nuclear-Weapon-Free World. + +Formally, Kazakhstan has: + +Acceded to Treaty on the Non-Proliferation of Nuclear Weapons (NPT) +Ratified the Partial Nuclear Test Ban Treaty (PTBT) +Ratified the Comprehensive Nuclear Test Ban Treaty (CTBT) +Ratified the Lisbon Protocol to START I +Ratified the Central Asia Nuclear-Weapon-Free Zone +Ratified the Treaty on the Prohibition of Nuclear Weapons (TPNW) (Notably the only former Soviet successor state to do so) +Ratified the Collective Security Treaty Organization (CTSO) + +==== Comprehensive Test Ban Treaty ==== +On 30 September 1996, Kazakhstan signed the Comprehensive Nuclear-Test-Ban Treaty and ratified it on 14 May 2002. Immediately, Kazakhstan became an important party to the treaty as its National Nuclear Center has several seismic stations and one infrasound station that work as detection equipment for nuclear tests. Furthermore, the Semipalatinsk Test Site is suited to calibrate the stations with large explosions. + +==== Central Asian Nuclear-Weapon Free Zone ==== +In 2006, Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan signed the Tashkent Treaty that established a nuclear-weapon free zone in Central Asia. Uzbekistan put forward the idea of the nuclear-weapon free zone for the first time in 1993 when Kazakhstan still had Soviet nuclear weapons so it failed to grasp support from all parties, however, in 1995 the parties agreed to start drafting the Treaty after Kazakhstan denuclearized. In the Treaty, the parties agreed to never manufacture, acquire, test, or possess nuclear weapons on its territory again and called for nuclear states under the Non-Proliferation Treaty to respect their policy. + +==== IAEA low enriched uranium bank ==== +On 27 August 2015, the IAEA and Kazakhstan signed an agreement to host the world's first Low Enriched Uranium Bank in the Ulba Metallurgical Plant located in Oskemen. Active since 2019, the bank is owned and operated by the IAEA as part of an effort to assure access to nuclear fuel in case there are any disruptions to the commercial supply of LEU, especially considering the projected increase in demand for the material as new nuclear reactors are built. The objective of this assurance-of-supply mechanism is for countries to be less tempted to develop their own nuclear fuel production facilities hence reducing the risk of proliferation. Therefore, the facility’ minimal capacity aims to always be at least one reload for each reactor design currently on the market. +The initiative was formally born in 2006 when US Senator Sam Nunn, co-chair of the NGO Nuclear Threat Initiative, offered $50 million to the IAEA to create a LEU bank after Director-General ElBaradei called for approaches to tackle the most sensible part of the nuclear fuel cycle, uranium enrichment and plutonium separation, while guaranteeing the material's supply and non-proliferation. This initiative won the financing and support from the IAEA over other 11 existing ones after President Nazarbayev offered to host the bank in 2009. After an extensive three and a half years of negotiations between the IAEA Secretariat and the Kazakhstani authorities, the agreement was finalized in January 2015 where Kazakhstan agreed to lease the facility to the IAEA for one euro annually. +Overall, Kazakhstan's decision to host the LEU Bank can be understood as a notable nuclear diplomacy initiative for the nation and the IAEA. For the international community, this is the first of its kind internationally controlled depository for nuclear fuel whilst, for Kazakhstan, it promotes its advanced nuclear industry while also showing its desire to contribute to a global nonproliferation regime. + +==== Nunn-Lugar Cooperative Threat Reduction Program ==== + +As part of Project Sapphire in the Nunn-Lugar Cooperative Threat Reduction Program, the United States announced on 23 November 1994, its measure to assist Kazakhstan on the removal of 581 kg of Highly Enriched Uranium from the Ulba Metallurgical Plant in Ust Kamenogorsk. The U.S. airlifted the materials back from Kazakhstan, downblended it into LEU, and sold it on the market on behalf of the U.S. government. In return, Kazakhstan received around $25 million in cash and in-kind assistance. As part of the same programme, between 1995 and 2001, the U.S. helped seal 13 bore holes and 181 tunnels at testing sites. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction-3.md b/data/en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction-3.md new file mode 100644 index 000000000..7c8f2c8c7 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction-3.md @@ -0,0 +1,51 @@ +--- +title: "Kazakhstan and weapons of mass destruction" +chunk: 4/4 +source: "https://en.wikipedia.org/wiki/Kazakhstan_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:55.900179+00:00" +instance: "kb-cron" +--- + +==== Opposition of nuclear weapons ==== +Heading into the 21st century, Kazakhstan continued to play a role in opposing nuclear weapons. President Nursultan Nazarbayev founded the ATOM project (which stands for Abolish Testing. Our Mission) in 2012, and spoke in favor of a nuclear-weapons-free-world in 2015 at the UN General Assembly General Debate before tabling a resolution to initiate a Universal Declaration for the Achievement of a Nuclear-Weapon-Free World that was adopted on 8 December. On 29 August 2016, which marked both the UN International Day against Nuclear Tests and the 25th anniversary of the closure of the Semipalatinsk site, Kazakhstan hosted an international conference – Building a Nuclear-Weapon-Free World. + +== Current situation == + +=== Uranium extraction === +Since the discovery of uranium deposits in the 1950s, Kazakhstan has been engaged in active mining, and construction of the uranium ore processing centers. Before the dissolution of the USSR, Kazakhstan was the most important ground for military-industrial activity, producing more than 70,000 metric tons of natural uranium a year. A fast progressing uranium mining industry could have made Kazakhstan the fourth nuclear giant. However, after the Soviet Union collapsed, Kazakhstan made a decision to pursue policies of denuclearization. +On 14 February 1994, Kazakhstan officially ratified the Non-Proliferation Treaty that prohibited the deployment of nuclear weapons on Kazakhstan's territory. Ever since, the International Atomic Energy Agency (IAEA) has been maintaining control of the nuclear-weapons-usable materials located in the country. The facilities that are currently under control are the Institute of Atomic Energy, Power Reactors, Research Reactors. However, for the longest time most of the Uranium Processing sites have not been monitored by the IAEA. It was not until 2016 that the IAEA provided security guidance documents that include control and security measures, physical protection of natural uranium and full assurance of safety during transportation, production and storage. Thereby, a rigorous and effective assistance of International Atomic Energy Agency allows Kazakhstan to continue safely produce more than 20,000 tons of natural uranium per year and maintain 23 production sites for extracting and processing uranium. +Nowadays, Kazakhstan has been successfully using its nuclear past and resources to develop connections and make agreements with other countries. Kazakhstan's nuclear past gave it necessary nuclear facilities, mining complexes, technological and scientific knowledge to develop uranium industries. Well-developed infrastructure and resources allows Kazakhstan to effectively mine and export natural uranium, export nuclear fuel, and build nuclear reactors. +One of the largest companies in Kazakhstan and in the global nuclear market is Kazatomprom. This company holds a monopoly over all activities associated with uranium mining and nuclear-fuel. Every year the production of uranium increased, in 2007 Kazatomprom was producing 6,637 tonnes but in 2010 it produced 15,000 tonnes. Over the years, Kazakhstan has become an absolute leader in production of uranium holding 41% of world supply. + +==== Potential risks ==== +Kazakhstan's ambitious plans in the uranium and nuclear fuel field raised concerns. One of which is the risk of its proliferation and the creation of dirty bombs from natural uranium waste. Since the non-proliferation treaty was signed, Kazakhstan has never breached any rules and showed an excellent record, supporting strict non-proliferation regulations. However, the risk remains due to the country's activities in the nuclear field. +Kazakhstan's regulatory and legal framework regarding nuclear facilities is constantly being improved to regulate the main aspects of activities for the peaceful use of nuclear energy. The main purpose is the development of the nuclear industry and the creation of nuclear energy to ensure the accelerated industrial and innovative development of the country. + +==== Seeking to diversify the pool of partners ==== +Kazatomprom has entered into cooperation agreements and established a number of joint ventures with companies from Russia, Canada, France, China and Japan. Russia has always been one of the main partners of Kazakhstan in enrichment of uranium. In May 2007, the International Uranium Enrichment Centre in Angarsk was established by Kazakh-Russian joint venture. Another major joint-venture was set with China. In December 2006 China Guangdong Nuclear Power Group signed a strategic cooperation agreement with Kazatomprom. According to the agreement Kazatomprom will be a major supplier of uranium supply and fuel fabrication to China. Such a venture is strategically crucial to China's nuclear power industry. With Japan, Kazatomprom made agreements to supply uranium in return for the technical assistance in fuel cycle developments and nuclear reactor construction. In May 2007, Canada agreed to use its refining technologies to increase the production of its Inkai mine in Kazakhstan and build a nuclear-conversion plant on the site of the Ulba Metallurgical plant in eastern Kazakhstan that will boost the production of uranium to 12,000 tonnes. The agreement with the French multinational company Areva is another joint-venture that will further increase the production of uranium per year to approximately 4,000 tonnes. + +==== Future and ISL method ==== +In the 70s-80s, a few uranium deposits that were discovered in Kazakhstan appeared to be amenable to the In situ leach (ISL) method. This methods is less costly and more environmentally friendly. When one of the most unique uranium ore regions - The Chu-Syrdarya - was discovered, the ISL method was used to carry out tests and extraction. As a result of successful testing using ISL method, more than 80% of uranium was extracted. Due to the ISL method, the Chu-Syrdarya uranium region was successfully mined and developed. The reserve is unique in the sense that its reserves range from 20,000 to 350,000 tons of uranium. The total resources of the region account for about 0.6 million of approved uranium. +The ISL method attracts a lot of world uranium producers. This method provides both ecological and economic advantages. Uranium extraction with ISL method results in less surface damage, reduced contamination and costs. In addition, the new technological advancements in ISL operations can increase the production capacity and allow for the development of successful, sustainable uranium mining industries. + +== See also == +Kazatomprom +Foreign relations of Kazakhstan +Kazakhstan - Iran relations +Kazakhstan–United States relations + +== References == + +== Bibliography == + Bauer, S., et al. "Radiation Exposure due to Local Fallout from Soviet Atmospheric Nuclear Weapons Testing in Kazakhstan: Solid Cancer Mortality in the Semipalatinsk Historical Cohort, 1960–1999." Radiat. Res. 164, 409–419, 2005. +Kassenova, T. "Kazakhstan’s ‘Nuclear Renaissance.’" St Antony's International Review 4, no. 2 (2009): 51–74. JSTOR 26472733 +Semipalatinsk Nuclear Testing: The Humanitarian Consequences. (n.d.). Retrieved 14 March 2022, from http://large.stanford.edu/courses/2014/ph241/powell2/docs/vakulchuk.pdf +Semipalatinsk Test Site. The Nuclear Threat Initiative. (2022, 13 January). Retrieved 14 March 2022, from https://www.nti.org/education-center/facilities/semipalatinsk-test-site/ + +== External links == +International Atomic Energy Agency +Kazakhstan: Seven Year Plan for Prosperity by Dinmukhamed Konayeb - A Soviet Propaganda booklet that goes over the Kazakh Soviet Socialist Republic +National Nuclear Center of Kazakhstan +United Nations Treaty on the Non-Proliferation of Nuclear Weapons (NPT) \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Khimprom_(Volgograd)-0.md b/data/en.wikipedia.org/wiki/Khimprom_(Volgograd)-0.md new file mode 100644 index 000000000..1ff1041aa --- /dev/null +++ b/data/en.wikipedia.org/wiki/Khimprom_(Volgograd)-0.md @@ -0,0 +1,28 @@ +--- +title: "Khimprom (Volgograd)" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Khimprom_(Volgograd)" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:57.120821+00:00" +instance: "kb-cron" +--- + +Khimprom (Russian: Волгоградское открытое акционерное общество «Химпром», formerly known as Plant 91) was a major producer of industrial and consumer chemical products based in Volgograd, Russia. The company used to manufacture organophosphorus nerve agents, and as of 2013 still produced dual-use chemicals. + + +== History == +The plant was established in 1931. The plant began production of sarin in 1959, and soman in 1967; production of both was officially ended before 1987. It was claimed that the plant manufactured 5 to 10 tons of binary nerve agent in 1991 as part of the Foliant research program, that was subsequently field tested at the Ust'yurt plateau, Uzbekistan. In the post-Soviet era, the plant manufactured phosphorus oxychloride, and a range of phosphorus- and fluorine-containing compounds. +The company's financial situation grew worse in the late 2000s, and it was officially declared bankrupt in 2012. Production at the plant was fully discontinued in 2014. In January 2015, layoffs began as the enterprise was being liquidated. At the same time, projects were launched to restore the environmental damage caused by the plant during decades of chemical production. As of May 2018, the local government is in talks with the Japan-based Marubeni to build a modern methanol plant on the Khimprom site. + + +== Present time == +December 27, 2019 - liquidation of the organization. +Bankruptcy trustee is Chertkova Inna Valeryevna (for 2024). + + +== References == + + +== External links == +Official website \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Khimprom_Novocheboksarsk-0.md b/data/en.wikipedia.org/wiki/Khimprom_Novocheboksarsk-0.md new file mode 100644 index 000000000..3dc799cc7 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Khimprom_Novocheboksarsk-0.md @@ -0,0 +1,85 @@ +--- +title: "Khimprom Novocheboksarsk" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Khimprom_Novocheboksarsk" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:58.312580+00:00" +instance: "kb-cron" +--- + +Khimprom Novocheboksarsk (Russian: ПАО «Химпром») is a chemicals-producing company based in Novocheboksarsk, Russia. It is part of Orgsintez Group (Renova). +The Novocheboksarsk Khimprom Production Association is a giant facility whose Production Facility No. 3 manufactured chemical agents between 1972 and 1987. The plant is now making preparations to destroy chemical weapons and agents while continuing to produce household chemicals and fertilizers. +The company used to manufacture organophosphorus nerve agents, and as of 2013 still produced dual-use chemicals. It produced Soviet V-gas until 1987, and still manufactures phosphorus oxychloride, phosphorus trichloride, and dimethyl phosphite, and phosphorus-based insecticides, herbicides and dyestuffs. + + +== Products == +As of June 2022 the company has listed the following chemical compounds that it's been producing at the time: + +Antioxidant С-789 (for rubber industry) +Acetonanil H (2,2,4-Trimethyl-1,2-dihydroquinoline) +Benzamine N, (epoxy curing agent) +Bifurgin (Russian: Бифургин) +Hydrogen peroxide +Sodium hydrosulfide +Calcium hypochlorite +Sodium hypochlorite +Diphenylguanidine (vulcanizing agent in rubber industry) +Hydrophobicity-inducing liquids (probably Bis(trimethylsilyl)amine) +Calcium hydroxide (CaOH) +Calcium chloride (CaCl, liquid) +2-Ethylhexanoic acid +Hydrogen chloride (HCl) +Organic silica gels (used in oil drilling industry to secure borehole stability) +Silicon tetrachloride: +Organic silica varnishes +Dichloromethane +Sodium hydroxide (NaOH) +Polyethylene glycol ethers +Chlorinated paraffins +Polyamine +Additives for mineral oils +Organic silica risings +Poly(methylphenylsiloxane)-based resins at different dilution levels +Isopropyl alcohol +Isopropyl alcohol-based antiseptics in mixtures with paraffins (75%/25%) +Tetraethyl orthosilicate +Trichlorosilane +Carbon tetrachloride +Trichlorophenylsilane +Liquid chlorine (Cl) +Chlorobenzene +Chloroform +Silica-based enamels + + +=== Flotation agents === +A range of chemical flotation agents for froth flotation processes: + +Dibutyl dithiophosphate +Disobutyl dithiophosphate +Sodium dithiophosphate etc. + + +== Management == +Source: + +General Managing Director - Kolchin Dmitry Vladimirovich +First Deputy General Director - Kolesnikova Elena Vladimirovna +Commercial Director - Fedotov Alexey Viktorovich +Director of Legal Affairs - Vinogradova Lada Evgenievna +Director of Security - Yakovlev Oleg Nikolaevich +Chief Engineer - Gorin Vadim Konstantinovich +Director of Human Resources Management - Rogozin Elena Valeryevna +Director of Production - Kurmanov Viktor Ivanovich +Director of the Research Center - Efimov Yuri Timofeevich + + +== Notes == + + +== References == + + +== External links == +Official website \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/LICIACube-0.md b/data/en.wikipedia.org/wiki/LICIACube-0.md new file mode 100644 index 000000000..2c5ea941f --- /dev/null +++ b/data/en.wikipedia.org/wiki/LICIACube-0.md @@ -0,0 +1,64 @@ +--- +title: "LICIACube" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/LICIACube" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:35.430141+00:00" +instance: "kb-cron" +--- + +Light Italian CubeSat for Imaging of Asteroids (LICIACube, ) is a six-unit CubeSat of the Italian Space Agency (ASI). LICIACube is a part of the Double Asteroid Redirection Test (DART) mission and carries out observational analysis of the Didymos asteroid binary system after DART's impact on Dimorphos. It communicates directly with Earth, sending back images of the ejecta and plume of DART's impact as well as having done asteroidal study during its flyby of the Didymos system from a distance of 56.7 km (35.2 mi), 165 seconds after DART's impact. LICIACube is the first purely Italian autonomous spacecraft in deep space. Data archiving and processing is managed by the Mission Control Center of Argotec. Its mission ended in the autumn of 2022. + + +== History == +LICIACube is the first deep space mission developed and autonomously managed by an Italian team. To collaborate upon the design, integration, and testing of the CubeSat, the Italian Space Agency selected the aerospace company Argotec, while the LICIACube GS has a complex architecture based on a mission control center in Turin hosted by Argotec and science operation center in Rome. Antennas of the NASA Deep Space Network (NASA DSN) and data archiving and processing is managed at the ASI SSDC. The scientific team making this cubesat is led by National Institute of Astrophysics INAF (OAR, IAPS, OAA, OAPd, OATs) with the support of IFAC-CNR and Parthenope University of Naples. The team is supported by the University of Bologna for orbit determination and satellite navigation and the Polytechnic University of Milan, for mission analysis and optimisation. The LICIACube team includes the wider Italian scientific community involved in the definition of all the aspects of the mission: trajectory design; mission definition (and real-time orbit determination during operations); impact, plume and imaging simulation, and modelling, in preparation of a suitable framework for the analysis and interpretation of in situ data. Major technological challenges during the mission (autonomous targeting and imaging of such a small body during a fast flyby with the limited resources of a CubeSat) is affordable thanks to cooperation between the mentioned teams in support of the engineering tasks. + + +== Satellite design == +In order to deal with the mission, the Argotec platform uses an autonomous attitude control system, two light solar arrays, an integrated propulsion system with thrusters of 50mN thrust and isp of 40s, two cameras, an X-band communication system, and an advanced onboard computer. + + +== Scientific payload == +LICIACube is equipped with two optical cameras for conducting asteroidal reconnaissance during flyby, dubbed LEIA (LICIACube Explorer Imaging for Asteroid), a Catadioptric camera, a narrow field of view (FoV) of 2.06°, 25 microradian/pixel, 2048x2048 pixels, monochrome, achieving a best resolution of 1.38 m/pix at closest approach) camera, and LUKE (LICIACube Unit Key Explorer), a wide 5° FoV imaging camera with an RGB Bayer pattern infrared filter. These captured scientific data revealing the composition of the asteroid and provided data for its autonomous system by finding and tracking the asteroid throughout the encounter. As it was released when DART sped up for its intentional impact, it took an image every 6 seconds during DART's impact period. It had preliminary flyby targets including taking 3 high resolution images revealing the asteroid's morphology concentrating on the physics of the asteroid and plume generations after impact. This may help characterise the consequences of the impact. + + +== Mission profile == + + +=== Launch === +LICIACube was manufactured in Italy and sent to Applied Physics Laboratory (APL) of Johns Hopkins University in September 2021. On 8 September 2021, the LICIACube was integrated into the DART spacecraft for launch on 24 November 2021, at 06:21:02 UTC, inside a spring-loaded box placed on the wall of the DART spacecraft. + + +=== Goals === +LICIACube's goals are to: + +Document the effect of DART's impact on the secondary member of the 65803 Didymos binary asteroid system +Characterise the shape of the target +Perform dedicated scientific investigations on it + + +=== Cruise phase and flyby === + +After the launch, the Cubesat remained enclosed within a spring-loaded box and piggybacks with the DART spacecraft for almost the entire duration of DART's mission. It separated on 11 September 2022 from DART by being ejected at roughly 4 km/h (1.1 m/s; 2.5 mph) relative to DART, 15 days before impact. After release, as part of the testing process to calibrate the miniature spacecraft and its cameras, LICIACube captured images of a crescent Earth and the Pleiades star cluster, also known as the Seven Sisters. + +It conducted 3 orbital manoeuvrers for its final trajectory, which flew it past Dimorphos about 2 minutes 45 seconds after DART’s impact. That slight delay allowed LICIACube to confirm impact, observe the plume’s evolution, potentially capture images of the newly formed impact crater, and view the opposite hemisphere of Dimorphos that DART never saw, while drifting past the asteroid. + + +=== Mission after flyby === +After the flyby, the spacecraft spent several weeks downlinking image data. Potential targets were selected for an extended mission, including asteroid 14827 Hypnos (1986 JK) on 3 June 2024. Signal with LICIACube was lost on 24 October 2022. Following unsuccessful attempts to reestablish contact, end of mission was declared on 23 December. + + +== Results == + +Several images have been transmitted to Earth showing rays of impact debris streaming from Dimorphos. +On 28 September 2022, the first images of the impact from the LICIACube probe were published on a NASA web page. + + +== Gallery == + + +== See also == + + +== References == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction-0.md b/data/en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction-0.md new file mode 100644 index 000000000..5ba78db5e --- /dev/null +++ b/data/en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction-0.md @@ -0,0 +1,23 @@ +--- +title: "Libya and weapons of mass destruction" +chunk: 1/4 +source: "https://en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:59.516583+00:00" +instance: "kb-cron" +--- + +Libya pursued programs to develop or acquire weapons of mass destruction from when Colonel Muammar Gaddafi of Libyan Army seized control of Libya in 1969 until he announced on 19 December 2003 that Libya would voluntarily terminate its programs of nuclear, chemical, ballistic missiles, and other efforts that could lead to internationally proscribed weapons of mass destruction. +In 1968, Libya under King Idris signed the Nuclear Non-Proliferation Treaty (NPT), ratified it under Gaddafi in 1975, and concluded a safeguards agreement with the International Atomic Energy Agency (IAEA) in 1980. Despite being the signatory state of NPT, Libya under Gaddafi pursued nuclear weapons from different venues including employing of foreign experts and using the proliferation network to locally advance its efforts. After the terrorist attacks in the United States in 2001, followed by the Iraq War in 2003, Libya engaged in rolling back its efforts in an exchange of improving the relations with the United States and the Western world. The United States and the United Kingdom assisted Libya in removing equipment and rolling back its program, with independent verification by the IAEA. +In 1972, Libya signed the Biological Weapons Convention (BWC) and ratified it in 1982. +In 1970, Libya secretly acquired chemical weapons capability from the Soviet Union and was one of the non-signatory states of Chemical Weapons Convention (CWC), only acceded to become a member of the CWC on 6 January 2004. Libya declared 24.7 metric tonnes of mustard gas, 1,390 metric tonnes of chemical precursors for making sarin, as well as 3,563 unloaded chemical weapon munitions (aerial bombs). Destruction of the Libyan chemical weapons was agreed upon when the Organisation for the Prohibition of Chemical Weapons (OPCW) set January 2014 as the deadline for the full destruction of Libya's chemical weapons. Libya began destroying its chemical stockpiles and munitions later in 2004, but it missed deadlines for converting one chemical weapons production facility to peaceful use and for destroying its stockpile of mustard agent. +In October 2014, Libya asked for foreign assistance to transport its 850 tonne stockpile of precursor chemicals for making nerve gas out of Libya for destruction. In February 2015, Libyan military sources told media that unidentified armed men had captured large amounts of Libya’s chemical weapons, including mustard gas and sarin. Destruction of Libya's chemical weapon precursors was completed in November 2017. +Libya signed the Treaty on the Prohibition of Nuclear Weapons on 20 September 2017, but has not ratified it. + +== Nuclear program == +In 1968, Libya under Idris became a signatory state of the Non-Proliferation Treaty (NPT) and was ratified by Muammar Gaddafi in 1975. This was followed by the safeguards agreement with the International Atomic Energy Agency (IAEA) in 1980 that allowed the cooperation on peaceful applications of nuclear power with the Soviet Union. +Despite being a signatory state of the Non-Proliferation Treaty and its international obligations, Libya under Gaddafi since 1969 had actively pursued its ambitions of acquiring nuclear weapons by employing large number of foreign experts and used proliferation network to allegedly to counter the covert Israeli nuclear capability. +Eventually, the Libyan efforts were later exposed by Friedrich Tinner (one of its leading foreign expert) in an exchange for immunity in 2003. Earlier in July 1995, the IAEA had reported that Libya had made a "strategic decision to reinvigorate its nuclear activities, including gas centrifuge uranium enrichment," which can enrich uranium for use in nuclear reactors as well as for nuclear weapons. +After the dissolution of the Soviet Union in 1991 and the terrorist attacks in the United States in 2001, followed by the Iraq War in 2003, Libya under Gaddafi engaged in nuclear disarmament with the assistance from the United States and the IAEA in an exchange for improving relations with the Western world. +At the time its nuclear program was rolled back, the Libya's nuclear program remained in and early developmental stage. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction-1.md b/data/en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction-1.md new file mode 100644 index 000000000..f1fe8d706 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction-1.md @@ -0,0 +1,32 @@ +--- +title: "Libya and weapons of mass destruction" +chunk: 2/4 +source: "https://en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:59.516583+00:00" +instance: "kb-cron" +--- + +=== Foreign assistance === +Gaddafi‘s most famous buying foray for nuclear weapons was in 1970, when Libyan leaders paid a state visit to China. Gaddafi and his Prime Minister Abdessalam Jalloud made an unsuccessful attempt to convince China to sell tactical nuclear weapons to Libya. Gaddafi's justification for seeking nuclear weapons was his concern over the Israeli nuclear capability, and publicly expressed his desire to obtain nuclear weapons. +In 1974, Gaddafi paid a state visit to Pakistan to attend the second summit of the Organisation of Islamic Cooperation in Lahore and found a secret opportunity to research on the nuclear weapons in Pakistan. With the 1977 coup of the Bhutto administration by the Pakistani military, Libya was restricted and any attempts for its requests were rebuffed by the upcoming Zia administration due to President Zia himself distrusted and disliked the Libyans. +With relations severed with Pakistan, Gaddafi normalized relations with India in 1978, and eventually reaching a mutual understanding for civil nuclear cooperation with India. An effort was made to gain access to the raw uranium ore in a view of enriching towards industrial-grade uranium but this approach proved difficult and failed due to lack of scientific capability. In 1980, Libya decided to acquire plutonium and secretly imported 1,200 kilograms (2,600 lb) of uranium ore from Niger without notifying it to the IAEA as required by its safeguards agreement. In 1982, Libya made an unsuccessful negotiation attempt with Belgium to procure a small industrial plant for manufacturing UF4 solid compound. +In 1984, Gaddafi facilitated the visit of the Indian Prime Minister Indira Gandhi to Libya and was successful in reaching a pact with India on nuclear technology. India, citing the lack of manpower and infrastructure, later downplayed any cooperation with Libya. During the same year, Libya had reached out to Japan for procuring a small uranium conversion plant and a Japanese company supplied Libya with the technology; the sale was apparently arranged directly with the Japanese instead of through middlemen. +In 1985 and onward, Libya under Gaddafi used a smuggling network which UN weapons investigators found had connections to China. +The Libyan program had employed Friedrich Tinner, a Swiss engineer who guided on most of the Libyan efforts on scaling the uranium towards military-grade using the gas centrifuges methods but was unable to produce an operating centrifuge without the outside technical experts. In 1995, Gaddafi renewed calls for nuclear weapons and pursued new avenues for nuclear technology procurement, while publicly affirming its NPT commitments. With the enforcement of the economic sanctions on Libya and Iran by the Clinton administration in 1996, Gaddafi sought to persuade U.S. President Bill Clinton to lift UN sanctions in exchange for giving up its WMD programs. +In 1997, Libya received technical information on gas centrifuges from its smuggling network and was able to restart the project under Tinner, after it received 20 pre-assembled centrifuges and components for an additional 200 centrifuges and related parts from foreign suppliers. +In October 2000, the Libyan efforts oversaw by Tinner were successful in installing a complete single centrifuge, using a pre-assembled rotors, at its Al Hashan site. However, further experiments relating to the efficiency, performance, and efficacy of the centrifuges failed as the technical guides and documents were too difficult to interpret and bring into operation. Ultimately, Libya notified the IAEA and told its investigators that it had no national personnel competent to evaluate these designs at that time, and due to its extreme difficulty, Libya would have had to ask the supplier for help if it had decided to pursue a nuclear weapon. + +==== Soviet Union ==== + +In 1979, Libya fostered close strategic ties with the Soviet Union including cooperation on peaceful use of nuclear technology under IAEA safeguards. In 1981, the Soviet Union agreed to build a 10 megawatts (0.010 GW) research reactor at Tajoura, known as the "Tajura Nuclear Research Facility (TNRF)". There were reports of unsanctioned experiments being performed by the Russian experts on the uranium at the behest of the Libyan government. An unnamed nuclear weapon state, whose name has been kept secret by the IAEA, allegedly assisted Libya in these experiments. American nuclear weapons expert, David Albright of the Institute for Science and International Security, said the Soviet Union and China were the most likely suspects. +In 1984, Libya began to negotiate with the Soviet Union for purchasing a commercial nuclear power plant but talks failed due to technical difficulties encountered in understanding and running the Russian genertaion II reactors. +In 1991, Libya tried to exploit the chaos generated by the collapse of the Soviet Union to gain access to nuclear technology, expertise, personnel, and materials. In 1992, it was reported by an official of the Kurchatov Institute in Moscow claimed that Libya had unsuccessfully tried to recruit two of his colleagues to work at the "Tajoura Nuclear Research Center" in Libya. Other reports also suggested that Russian scientists had been hired to work on a covert Libyan nuclear efforts. +In March 1998, Russia and Libya signed a contract with the Russian consortium, the Atomenergoeksport, for a partial overhaul of the Tajoura Nuclear Research Center. + +=== Dismantlement === + +In 1992, the rollback of the Libya's nuclear program started with the Clinton administration according to the U.S. diplomat, Martin Indyk, who maintained that the negotiations and diplomatic efforts rolling back Libyan nuclear program were started as early as Bill Clinton assuming the presidency. + +== Chemical weapons program == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction-2.md b/data/en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction-2.md new file mode 100644 index 000000000..ee253b1ed --- /dev/null +++ b/data/en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction-2.md @@ -0,0 +1,22 @@ +--- +title: "Libya and weapons of mass destruction" +chunk: 3/4 +source: "https://en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:59.516583+00:00" +instance: "kb-cron" +--- + +In August 1987, the Chadian government accused Libya of using chemical weapons during the Chadian–Libyan War. In 1970, Libya under Gaddafi received Scud missile launchers and obtained chemical munitions from the former Soviet Union and the East Germany with other reports claiming that the Libyans received chemical warfare training from the Soviet Union and some chemical agents from Poland in 1980, or from Iran in exchange for naval mines for their tanker war against Iraq. In response to these claims the United States shipped 2,000 gas masks to Chad. According to West German intelligence reports, Libya was working on the construction of chemical weapons facility during the 1980s. +Libya under Gaddafi actively maintained a chemical weapons program and deliverable to Soviet-supplied missiles, which was ostensibly decommissioned in the 2003 and early 2010s as Gaddafi sought to normalise relations with the Western world. Libya acceded to the Chemical Weapons Convention with effect on 5 February 2004, and declared 24.7 metric tonnes of mustard gas, 1,390 metric tonnes of chemical precursors for making sarin, as well as 3,563 unloaded chemical weapon munitions (aerial bombs). + +=== Destruction === +The Organisation for the Prohibition of Chemical Weapons (OPCW) supervised the destruction of Libya's chemical weapons through February 2011, when it was forced to suspend its operations due to the uprising against Gaddafi and the resulting deterioration of the country's stability. By then, Libya had destroyed 40% of its precursor materials and 55% of its mustard gas, as well as 3,500 chemical weapon munitions. In early September 2011, OPCW Director-General Ahmet Üzümcü said reports he had received indicated that the remaining weapons were secure and had not fallen into the hands of militant groups. +A stockpile of mustard gas, which the OPCW reported the regime may have attempted to hide from inspectors overseeing the chemical weapons program's dismantlement, was reportedly found in the Jufra District by anti-Gaddafi fighters less than two weeks later. In late September it was reported by the Wall Street Journal that a major ammunition complex, including chemical-weapons-capable artillery shells, was unguarded and open to looting. In December 2012 a senior Spanish intelligence official said that Al Qaeda in the Islamic Maghreb "probably also has non-conventional arms, basically chemical, as a result of the loss of control of arsenals", with Libya the most likely source. +Libya's National Transitional Council cooperated with the OPCW in the destruction of the remaining chemical weapons. After assessing the chemical stockpiles, the OPCW set a deadline for the destruction of the weapons by the Libyan government. As of September 2013, 1.6 metric tons of mustard blister agent loaded in artillery rounds, 2.5 metric tons of congealed mustard agent, and 846 metric tons of chemical weapons ingredients remained to be destroyed. +According to The New York Times, in February 2014, the remnants of Libya's chemical weapons had been discreetly destroyed by the United States and Libya, using a transportable oven technology to destroy hundreds of bombs and artillery rounds filled with deadly mustard agent. +In September 2014, OPCW said Libya still had around 850 tonnes of industrial chemicals that could be used to produce chemical weapons. In October 2014, Libya asked for foreign assistance to transport that stockpile of raw materials for making nerve gas out of Libya for destruction. On 5 February 2015, the Libyan Minister of Foreign Affairs and the Director-General of OPCW agreed on the need to complete the destruction of the remaining precursor chemicals. +On 21 February 2015, Asharq Al-Awsat reported that an anonymous Libyan army official stated extremists had seized large amounts of Gaddafi’s chemical weapons from multiple locations. The official warned that the targeted caches included mustard gas and sarin. The North Africa Post later reported that chemical weapons were stolen by armed men who stormed the chemical factory in the Jufra district where the weapons were stored. Military sources reportedly stated that among the chemical weapons are mustard gas and sarin. On 31 August 2016, the last stockpile of ingredients for chemical weapons in the country was removed to Germany to avoid it falling into the hands of militants and was slated for destruction. Destruction of Libya's chemical weapon precursors was completed in November 2017. + +== Ballistic missiles == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction-3.md b/data/en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction-3.md new file mode 100644 index 000000000..3657b11dd --- /dev/null +++ b/data/en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction-3.md @@ -0,0 +1,23 @@ +--- +title: "Libya and weapons of mass destruction" +chunk: 4/4 +source: "https://en.wikipedia.org/wiki/Libya_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:59.516583+00:00" +instance: "kb-cron" +--- + +The strategic relations with the Soviet Union allowed Libya to purchase at least 80 Scud-B missiles with transporter erector launchers, 40 FROG-7 missiles with transporter erector launchers, and several hundreds of chemical weapons deliverable missiles from the Soviet Union. +In 1982, Libya sent two 9P117 trucks and around 20 Scud-B missiles to Iran for the Islamic Revolutionary Guard Corps (IRGC) alongside with its instructors during the War of the cities against Iraq. After the Russians in Soviet Union pressured Libya to stop supplying missiles, the Iranian IRGC sought assistance from the North Korea instead for missile production. +In 1986, Gaddafi ordered the launch of Scud-B missiles against a United States facility on the Italian island of Lampedusa in retaliation for the United States bombing of Libya. Two missiles were fired, but fell short of their mark. +The Libya under Gaddafi also worked on the development of a domestically produced 950–1,000 km (590–620 mi) range missile, the "Al-Fatah" reportedly based on a West German design (the OTRAG rocket) with foreign assistance from Iraq, Iran, Serbia, and China. Due the slow engineering progress of the program, it was reported that Libya entered negotiations with North Korea to purchase Hwasong-7 missiles (or even Taepodong missiles), but such rumors ultimately proved to be false after the disarmament of Libya in 2003. +The Libyans purchased at least five Hwasong-6 (Scud-C) missiles from North Korea in 1995, receiving them in 1999. They were never tested or deployed and were ultimately scrapped (alongside their planned local production) after 2003. In exchange for the lifting of Western economic sanctions, Libya largely abandoned its domestic missiles program in 2004. +The Libyan Army under Gaddafi reportedly fired several Soviet Scud-B surface-to-surface missiles at areas in revolt against the regime, including Misrata and Ajdabiya, during the Libyan Civil War of 2011, but the missiles had missed their targets. Several more Scuds, with launchers, were found by anti-Gaddafi fighters near Tripoli and Sirte. The final phases of the NATO intervention reportedly destroyed the remaining Scud missiles in Libyan inventory, effectively ending the Libyan missile capability. + +== See also == + +Foreign relations of Libya +Nuclear technology + +== References == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Lucianne_Walkowicz-0.md b/data/en.wikipedia.org/wiki/Lucianne_Walkowicz-0.md new file mode 100644 index 000000000..f91d6ea66 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Lucianne_Walkowicz-0.md @@ -0,0 +1,47 @@ +--- +title: "Lucianne Walkowicz" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Lucianne_Walkowicz" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:18.508571+00:00" +instance: "kb-cron" +--- + +Lucianne Walkowicz ( WAW-kə-witch; born 1979) is an American astronomer, artist, and activist. They were based at the Adler Planetarium until 2022 and are noted for their research contributions in stellar magnetic activity and its impact on planetary suitability for extraterrestrial life. + + +== Career == +Since 2008, Walkowicz has been the chair of the Large Synoptic Survey Telescope (LSST) Transients and Variable Stars collaboration and is the founding director of the LSST Data Science Fellowship program. They are internationally recognized for their advocacy for conservation of dark night skies, and were named a 2011 National Academy of Sciences Kavli Fellow and a 2012 TED Senior Fellow. +In 2017, Walkowicz was named the fifth Baruch S. Blumberg NASA/Library of Congress Chair in Astrobiology in the John W. Kluge Center at the Library of Congress. They began their tenure October 1, 2017, working on a project titled "Fear of a Green Planet: Inclusive Systems of Thought for Human Exploration of Mars". Their project aims to create an inclusive framework for human exploration of Mars, encompassing both cutting-edge research on Mars as a place of essential astrobiological significance, while weaving in lessons from the diverse histories of exploration on Earth. +Walkowicz holds a BS in physics and astronomy from Johns Hopkins University, and an MS and PhD in astronomy from the University of Washington. As an undergraduate at Johns Hopkins, they got their taste for astronomy while testing detectors for the Hubble Space Telescope’s new camera. +On October 12, 2021, Walkowicz resigned their position on NASA's Astrophysics Advisory Committee over the Agency's terse response to concerns on the naming of the James Webb Space Telescope. +Walkowicz is co-founder of the JustSpace Alliance with Erika Nesvold to "advocate for a more inclusive and ethical future in space, and to harness visions of tomorrow for a more just and equitable world today". + + +=== Public appearances === +Walkowicz appeared in Werner Herzog's 2016 documentary Lo and Behold. +Walkowicz appeared in National Geographic's series MARS. +Walkowicz appeared in WGN Evening News's 2020 "Christmas Star". +Walkowicz appeared in Discovery’s 2022 documentary "Last Exit: Space,” directed by Rudolph Herzog + + +== Awards and honors == +Asteroid 205599 Walkowicz, discovered by the Sloan Digital Sky Survey in 2001, was named in their honor. The official naming citation was published by the Minor Planet Center on 17 November 2013 (M.P.C. 85914). + + +== Trademark lawsuit == +In April 2020 Walkowicz filed a trademark lawsuit against Mattel and one of its subsidiaries, American Girl. The lawsuit alleges that the toy-maker stole Walkowicz's likeness for the Luciana Vega astronaut doll. + + +== Personal life == +Walkowicz is non-binary and uses they/them pronouns. +Walkowicz is a movement artist, practicing aerial circus arts including Aerial Silks and Lyra. In 2019, they premiered a piece titled “40 Orbits,” at the Scholastic Art and Writing Awards at Carnegie Hall. + + +== References == + + + +== External links == +Lucianne Walkowicz on INSPIRE-HEP \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/NBC_Defense_Military_Academy-0.md b/data/en.wikipedia.org/wiki/NBC_Defense_Military_Academy-0.md new file mode 100644 index 000000000..6e5d07bb2 --- /dev/null +++ b/data/en.wikipedia.org/wiki/NBC_Defense_Military_Academy-0.md @@ -0,0 +1,51 @@ +--- +title: "NBC Defense Military Academy" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/NBC_Defense_Military_Academy" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:00.702189+00:00" +instance: "kb-cron" +--- + +The Marshal Semyon Timoshenko Nuclear, Biological and Chemical Defense Military Academy (Военная академия РХБ защиты имени Маршала Советского Союза С. К. Тимошенко) is a military university in Kostroma training officers for service in the Russian NBC Defense Troops of the Russian Ground Forces. It was established in 1932 in Moscow and is named after Semyon Timoshenko. It provides training and conducts research related to the protection of military and civilian personnel from the weapons of mass destruction. + + +== History == +The Military Chemical Academy of the Red Army was created in accordance with the resolution Council of Labor and Defense and by direct order of the Revolutionary Military Council on 13 May 1932, on the basis of the military chemical department of the Military Technical Academy of the Red Army and the 2nd Moscow Institute of Chemical Technology. The formation of the academy was completed by 1 October 1932. Its structure included the military engineering, special and industrial faculties. By order of the Revolutionary Military Council on 15 May 1934, it was given the honorific name Kliment Voroshilov. In 1937, the academy was renamed to the Military Academy of Chemical Defense named after Voroshilov. In 1958, by decree of the Council of Ministers of the USSR of May 27 No. 2052, the academy was renamed into the Military Academy of Chemical Defense (the name of "Voroshilov" was withdrawn). In connection with the golden jubilee anniversary of the Soviet Army and the Soviet Navy in 1968, the Presidium of the Supreme Soviet of the Soviet Union on Defender of the Fatherland Day awarded the academy with the Order of the Red Banner. Two years later, it was given the honorific "Semyon Timoshenko". In 1982, it was awarded with the Order of the October Revolution in honour of the 50th anniversary. Over 30 graduates of the academy were awarded with the titles of the Hero of the Soviet Union, Hero of Socialist Labour, and Hero of Russia. + + +== Academy Music Band == +The band was created in 1968 on the basis of the Band of the Kostroma Higher Command School of Chemical Defense and has taken part in all the most significant events of the Kostroma Oblast. Over the years, the unit has been led by such military conductors as Alexei Dmitriev, Viktor Valuev, Alexander Kolesnikov (an Honored Artist of Uzbekistan), and Alexander Povzhik. Since 1999, the band has been led by Lieutenant Colonel Eduard Klein. It has performed during the opening of an automobile bridge across the Volga River, a new building of the railway station, a circus, and the first high-speed train from Kostroma-Yaroslavl. In 2002, the band took part in the visit of the Patriarch Alexy II of Moscow. In 2010, the band took part in the production of Modest Mussorgsky's opera Khovanshchina on Susaninskaya Square in Kostroma in collaboration with the Novaya Opera Theatre. From 2010 to 2012, the band participated in military parades on Red Square. + + +== Heads of the Academy == + +Corps Commissioner Yakov Avinovitsky (1932-1937) +Major General Pyotry Lovyagin (1937-1941) +Military Engineer of the 1st Rank Yuri Klyachko (1941-1942) +Colonel Alexey Kislov (1942) +Lieutenant General of the Technical Troops Dmitry Petukhov (1942-1960) +Colonel General of the Technical Troops Dmitry Gorbovsky (1960-1972) +Colonel General of the Technical Troops Vladimir Myasnikov (1972-1990) +Lieutenant General Vladimir Kavunov (1990-1993) +Lieutenant General Boris Ivanov (1993-1996) +Lieutenant General Yuri Koryakin (1996-2002) +Lieutenant General Vladimir Manchenko (2002-2005) +Lieutenant General Nikolai Alimov (2005-2007) +Major General Yevgeni Kuchinsky (2007-2012) +Colonel Aleksey Bakin (2012—2014) +Major General Igor Kirillov (2014—2017) +Major General Igor Emelyanov (2017—Present) + + +== See also == +Budyonny Military Academy of the Signal Corps + + +== References == + + +== External links == + +Официальный сайт академии Archived 2017-08-06 at the Wayback Machine (in Russian) \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Novichok-0.md b/data/en.wikipedia.org/wiki/Novichok-0.md new file mode 100644 index 000000000..5355f1de6 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Novichok-0.md @@ -0,0 +1,23 @@ +--- +title: "Novichok" +chunk: 1/7 +source: "https://en.wikipedia.org/wiki/Novichok" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:02.039256+00:00" +instance: "kb-cron" +--- + +Novichok (Russian: Новичо́к, lit. 'newcomer, novice, newbie') is a family of nerve agents, some of which are binary chemical weapons. The agents were developed at the GosNIIOKhT state chemical research institute by the Soviet Union and Russia between 1971 and 1993. Some Novichok agents are solids at standard temperature and pressure, while others are liquids. Dispersal of solid form agents is thought possible if in ultrafine powder state. +Russian scientists who developed the nerve agents claim they are the deadliest ever made, with some variants possibly five to eight times more potent than VX, and others up to ten times more potent than soman. Iran has also been associated with the production of such chemical agents. +In the twenty-first century, Novichok agents came to public attention after they were used to poison opponents of the Russian government, including in the attempted assassination of Sergei Skripal in the United Kingdom which resulted in the poisonings of 5 people and the death of an unrelated civilian in Amesbury (2018), as well as the poisoning of Alexei Navalny (2020). However, the use of Novichok domestically against Russian citizens has been known since at least 1995. +In November 2019, the Organisation for the Prohibition of Chemical Weapons (OPCW), which is the executive body for the Chemical Weapons Convention (CWC), added the Novichok agents to "list of controlled substances" of the CWC "in one of the first major changes to the treaty since it was agreed in the 1990s" in response to the 2018 poisonings in the UK. + +== Design objectives == +Novichok agents were designed to achieve four objectives: + +to be undetectable using standard 1970s and 1980s NATO chemical detection equipment; +to defeat NATO chemical protective gear; +to be safer to handle; and +to circumvent the Chemical Weapons Convention list of controlled precursors, classes of chemical and physical form. +Some of these agents are binary weapons, in which precursors for the nerve agents are mixed in a munition to produce the agent just prior to its use. The precursors are generally significantly less hazardous than the agents themselves, so this technique makes handling and transporting the munitions a great deal simpler. Additionally, precursors to the agents are usually much easier to stabilise than the agents themselves, so this technique also makes it possible to increase the shelf life of the agents. This has the disadvantage that careless preparation may produce a non-optimal agent. During the 1980s and 1990s, binary versions of several Soviet agents were developed and are designated as "Novichok" agents. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Novichok-1.md b/data/en.wikipedia.org/wiki/Novichok-1.md new file mode 100644 index 000000000..127fc6b0f --- /dev/null +++ b/data/en.wikipedia.org/wiki/Novichok-1.md @@ -0,0 +1,22 @@ +--- +title: "Novichok" +chunk: 2/7 +source: "https://en.wikipedia.org/wiki/Novichok" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:02.039256+00:00" +instance: "kb-cron" +--- + +== History and disclosure == +Novichok agents were designed as part of a Soviet program codenamed Foliant. Five Novichok variants are believed to have been adapted for military use. The most versatile is A-232 (Novichok-5). Novichok agents have never been used on the battlefield. The UK government determined that a Novichok agent was used in the poisoning of Sergei and Yulia Skripal in Salisbury, Wiltshire, England in March 2018. This was unanimously confirmed by four laboratories around the world, according to the OPCW. +Novichok was also involved in the poisoning of a British couple in Amesbury, Wiltshire, four months later, believed to have been caused by residual nerve agent discarded after the Salisbury attack. The attacks led to the death of one person, left three others in a critical condition from which they recovered, and briefly hospitalised a police officer. The Russian government denies producing or researching agents "under the title Novichok". In September 2020, the German government said that opposition figure and anti-corruption activist Alexei Navalny, who was evacuated from Omsk to Berlin for treatment in late August after becoming ill during his flight, was poisoned by a Novichok agent. +Novichok has been known to most Western intelligence services since the 1990s, and in 2016 Iranian chemists working at a university in Tehran synthesised five of the seven Novichok agents for analysis and produced detailed mass spectroscopy data which was added to the OPCW's Central Analytical Database. Previously, there had been no detailed descriptions of their spectral properties in peer-reviewed general scientific literature. A small amount of agent A-230 was also claimed to have been synthesised in the Czech Republic in 2017 for the purpose of obtaining analytical data to help defend against these novel toxic compounds. +The Soviet Union and Russia reportedly developed extremely potent fourth-generation chemical weapons from the 1970s until the early 1990s, according to a publication by two chemists, Lev Fyodorov and Vil Mirzayanov, in Moskovskiye Novosti weekly in 1992. The publication appeared just on the eve of Russia's signing of the Chemical Weapons Convention. According to Mirzayanov, the Russian Military Chemical Complex (MCC) was using defence conversion money received from the West for development of a chemical warfare facility. Mirzayanov made his disclosure out of environmental concerns. He was the head of a counter-intelligence department and performed measurements outside the chemical weapons facilities to make sure that foreign spies could not detect any traces of production. To his horror, the levels of deadly substances were eighty times greater than the maximum safe concentration. +The Prosecutor-General of Russia effectively admitted the existence of Novichok agents when he brought a treason case against Mirzayanov. According to expert witness testimonies that three scientists prepared for the KGB, Novichok and other related chemical agents had indeed been produced and therefore Mirzayanov's disclosure represented high treason. +Mirzayanov was arrested on 22 October 1992 and sent to Lefortovo prison for divulging state secrets. He was released later because "not one of the formulas or names of poisonous substances in the Moscow News article was new to the Soviet press, nor were locations ... of testing sites revealed." According to Yevgenia Albats, "the real state secret revealed by Fyodorov and Mirzayanov was that generals had lied—and were still lying—to both the international community and their fellow citizens." Mirzayanov now lives in the U.S. +Further disclosures followed when Vladimir Uglev, one of Russia's leading binary weapons scientists, revealed the existence of A-232/Novichok-5 in an interview with the magazine Novoye Vremya in early 1994. In his 1998 interview with David E. Hoffman for The Washington Post the chemist claimed that he helped invent the A-232 agent, that it was more frostproof, and confirmed that a binary version has been developed from it. Uglev revealed more details in 2018, following the poisoning of the Skripals, stating that "several hundred" compounds were synthesised during the Foliant research but only four agents were weaponised (presumably the Novichok-5, −7, −8 and −9 mentioned by other sources): the first three were liquids and only the last, which was not developed until 1980, could be made into a powder. Unlike the interview twenty years earlier, he denied any binary agents were developed successfully, at least up until his involvement in the research ceased in 1994. +In the 1990s, the German Federal Intelligence Service (BND) obtained a sample of one Novichok agent from a Russian scientist, and the sample was analysed in Sweden, according to a 2018 Reuters report. The chemical formula was given to Western NATO countries, who synthesized it, then used small amounts to test protective equipment, detection of it, and antidotes to it. +Novichok was referred to in a patent filed in 2008 for an organophosphorus poisoning treatment. The University of Maryland, Baltimore research was funded in part by the U.S. Army. +Professor Leonid Rink, who said he had participated in the creation of Novichok agents, confirmed that the structures leaked by Mirzayanov were the correct ones. Rink was himself convicted in Russia for illegally selling a Novichok agent used in 1995 to assassinate a banker, Ivan Kivelidi, and his secretary. +David Wise, in his book Cassidy's Run, implies that the Soviet program may have been the unintended result of misleading information, involving a discontinued American program to develop a nerve agent code named "GJ", that was fed by a double agent to the Soviets as part of Operation Shocker. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Novichok-2.md b/data/en.wikipedia.org/wiki/Novichok-2.md new file mode 100644 index 000000000..495a7f5b4 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Novichok-2.md @@ -0,0 +1,34 @@ +--- +title: "Novichok" +chunk: 3/7 +source: "https://en.wikipedia.org/wiki/Novichok" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:02.039256+00:00" +instance: "kb-cron" +--- + +== Development and test sites == +Stephanie Fitzpatrick, an American geopolitical consultant, has claimed that the Chemical Research Institute in Nukus, Soviet Uzbekistan, produced Novichok agents, and The New York Times has reported that U.S. officials said the site was the major research and testing site for Novichok agents. Small, experimental batches of the weapons may have been tested on the nearby Ustyurt Plateau. Fitzpatrick also writes that the agents may have been tested in a research centre in Krasnoarmeysk near Moscow. Precursor chemicals were made at the Pavlodar Chemical Plant in Soviet Kazakhstan, which was also thought to be the intended Novichok weapons production site, until its still-under-construction chemical warfare agent production building was demolished in 1987 in view of the forthcoming 1990 Chemical Weapons Accord and the Chemical Weapons Convention. +Since its independence in 1991, Uzbekistan has been working with the government of the United States to dismantle and decontaminate the sites where the Novichok agents and other chemical weapons were tested and developed. Between 1999 and 2002 the United States Department of Defense dismantled the major research and testing site for Novichok at the Chemical Research Institute in Nukus, under a $6 million Cooperative Threat Reduction program. +Hamish de Bretton-Gordon, a British chemical weapons expert and former commanding officer of the UK's Joint Chemical, Biological, Radiation and Nuclear Regiment and its NATO equivalent, "dismissed" suggestions that Novichok agents could be found in other places in the former Soviet Union such as Uzbekistan and has asserted that Novichok agents were produced only at Shikhany in Saratov Oblast, Russia. Mirzayanov also says that it was at Shikhany, in 1973, that scientist Pyotr Petrovich Kirpichev first produced Novichok agents; Vladimir Uglev joined him on the project in 1975. According to Mirzayanov, while production took place in Shikhany, the weapon was tested at Nukus between 1986 and 1989. +Following the poisoning of the Skripals, former head of the GosNIIOKhT security department Nikolay Volodin confirmed in an interview to Novaya Gazeta that there have been tests at Nukus, and said that dogs were used. +In May 2018, the Irish Independent reported that "Germany's foreign intelligence service secured a sample of the Soviet-developed nerve agent Novichok in the 1990s and passed on its knowledge to partners including Britain and the US, according to German media reports." The sample was analysed in Sweden. Small amounts of the Novichok nerve agent were subsequently produced in some NATO countries for test purposes. + +== Description of Novichok agents == + +Mirzayanov provided the first description of these agents. Dispersed in an ultra-fine powder instead of a gas or a vapour, they have unique qualities. A binary agent was then created that would mimic the same properties but would either be manufactured using materials which are not controlled substances under the CWC, or be undetectable by treaty regime inspections. The most potent compounds from this family, Novichok-5 and Novichok-7, are supposedly around five to eight times more potent than VX. The "Novichok" designation refers to the binary form of the agent, with the final compound being referred to by its code number (e.g. A-232). The first Novichok series compound was in fact the binary form of a known V-series nerve agent, VR, while the later Novichok agents are the binary forms of compounds such as A-232 and A-234. + +According to a classified (secret) report by the US Army National Ground Intelligence Center in Military Intelligence Digest dated 24 January 1997, agent designated A-232 and its ethyl analogue A-234 developed under the Foliant programme "are as toxic as VX, as resistant to treatment as soman, and more difficult to detect and easier to manufacture than VX". The binary versions of the agents reportedly use acetonitrile and an organic phosphate "that can be disguised as a pesticide precursor." + +The agent A-234 is also supposedly around five to eight times more potent than VX. +The median lethal dose for inhaled A-234 has been estimated as 7 mg/m3 for two minute exposure (minute volume of 15 L, slight activity). The median lethal dose for inhaled A-230, likely the most toxic liquid Novichok, has been estimated as between 1.9 and 3 mg/m3 for two minute exposure. Thus the median lethal dose for inhaled A-234 is 0.2 mg (5000 lethal doses in a gram) and is below 0.1 mg for A-230 (10 000 lethal doses in a gram). + +The agents are reportedly capable of being delivered as a liquid, aerosol or gas via a variety of systems, including artillery shells, bombs, missiles and spraying devices. + +=== Controversy over formulation === +Mirzayanov gives somewhat different structures for Novichok agents in his autobiography than those which have been identified by Western experts. The Western formulations suffered from imperfect information, as can be seen in Fig. 1 of Chai et al in which Mirzayanov describes a family of compounds whereas Western scientists instantiate a particular salt. +Mirzyanov makes clear that a large number of compounds were made, and many of the less potent derivatives were reported in the open literature as new organophosphate insecticides, so that the secret chemical weapons program could be disguised as legitimate pesticide research. + +=== Chemistry === +According to chemical weapons expert Jonathan Tucker, the first binary formulation developed under the Foliant programme was used to make Substance 33 (VR), very similar to the more widely known VX, differing only in the alkyl substituents on its nitrogen and oxygen atoms. "This weapon was given the code name Novichok." \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Novichok-3.md b/data/en.wikipedia.org/wiki/Novichok-3.md new file mode 100644 index 000000000..69cef5e6d --- /dev/null +++ b/data/en.wikipedia.org/wiki/Novichok-3.md @@ -0,0 +1,20 @@ +--- +title: "Novichok" +chunk: 4/7 +source: "https://en.wikipedia.org/wiki/Novichok" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:02.039256+00:00" +instance: "kb-cron" +--- + +A wide range of potential structures have been reported. These all feature the classical organophosphorus core (sometimes with the P=O replaced with P=S or P=Se), which is most commonly depicted as being a phosphoramidate or phosphonate, usually fluorinated (cf. monofluorophosphate). The organic groups are subject to more variety; however, a common substituent is phosgene oxime or analogues thereof. This is a potent chemical weapon in its own right, specifically as a nettle agent, and would be expected to increase the harm done by the Novichok agent. Many claimed structures from this group also contain cross-linking agent motifs which may covalently bind to the acetylcholinesterase enzyme's active site in several places, perhaps explaining the rapid denaturing of the enzyme that is claimed to be characteristic of the Novichok agents. +Zoran Radić, a chemist at the University of California, San Diego, performed an in silico docking study with Mirzayanov's version of the A-232 structure against the active site of the acetylcholinesterase enzyme. The model predicted a tight fit with high binding affinity and formation of a covalent bond to a serine residue in the active site, with a similar binding mode to established nerve agents such as sarin and soman. + +=== Detection === +A procedure of retrospective detection of Novichok type poisons in victim's tissues was proposed in 2021-2. This method is a modification of the procedure that was developed earlier for identification of sarin poisoning. This method capitalizes on the fact that poisoning by organic phosphonates occurs via phosphonylation of the hydroxy group of serine in the active site of cholinesterases, and that severe poisoning occurs when a major part of these enzymes are inactivated. The concentration of butyryl cholinesterase (HuBuChE) in human plasma is normally about 80 nM. That makes it a good source of adducts that can be subjected to analysis. +The procedure consists of three steps (see the Figure A). First, HuBuChE is obtained from the victim's plasma. Second, the enzyme is subjected to pepsin proteolysis. Third, the peptide mixture obtained is subjected to LC-MSMS analysis. If no poisoning took place, the peptide mixture contains a non-modified nonapeptide FGESAGAAS. However, cholinesterases are inactivated due to a chemical reaction with Novichok type nerve agent, the modified nonapeptide is be detected, and its exact (high resolution) mass (along with the mass of the secondary ion produced during collision induced dissociation) allows unambiguous identification of the fact of poisoning and the exact structure of the poison. Thus, the example at Figure A shows the masses of the primary and secondary ions obtained from the plasma of the victim poisoned by A-230. If a victim is poisoned by other Novichok type agents, the masses are different. +This method allows identification of poisons at a few parts per billion, but that may be insufficient for reliable detection of the isotopic signature of the adducts, and therefore an unambiguous identification of the geographic origin of the poison. + +== Lifetime == +According to Vladimir Uglev, who headed a group that worked on the development of the Novichok agents, at least one liquid form of Novichok is very stable with a slow evaporation rate and can remain potent for possibly up to 50 years. Insufficient research has been conducted to fully understand its persistence in various situations in the environment. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Novichok-4.md b/data/en.wikipedia.org/wiki/Novichok-4.md new file mode 100644 index 000000000..95657609e --- /dev/null +++ b/data/en.wikipedia.org/wiki/Novichok-4.md @@ -0,0 +1,29 @@ +--- +title: "Novichok" +chunk: 5/7 +source: "https://en.wikipedia.org/wiki/Novichok" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:02.039256+00:00" +instance: "kb-cron" +--- + +== Effects and countermeasures == +As nerve agents, the Novichok agents belong to the class of organophosphate acetylcholinesterase inhibitors. These chemical compounds inhibit the enzyme acetylcholinesterase, preventing the normal breakdown of the neurotransmitter acetylcholine. Acetylcholine concentrations then increase at neuromuscular junctions to cause involuntary contraction of all skeletal muscles (cholinergic crisis). This then leads to respiratory and cardiac arrest (as the victim's heart and diaphragm muscles no longer function normally) and finally death from heart failure or suffocation as copious fluid secretions fill the victim's lungs. +As can be seen with other organophosphate poisonings, Novichok agents may cause lasting nerve damage, resulting in permanent disablement of victims, according to Russian scientists. Their effect on humans was demonstrated by the accidental exposure of Andrei Zheleznyakov, one of the scientists involved in their development, to the residue of an unspecified Novichok agent while working in a Moscow laboratory in May 1987. He was critically injured and took ten days to recover consciousness after the incident. He lost the ability to walk and was treated at a secret clinic in Leningrad for three months afterwards. The agent caused permanent harm, with effects that included "chronic weakness in his arms, a toxic hepatitis that gave rise to cirrhosis of the liver, epilepsy, spells of severe depression, and an inability to read or concentrate that left him totally disabled and unable to work." He never recovered and, after five years of deteriorating health, died in July 1992. +The use of a fast-acting peripheral anticholinergic drug such as atropine can block the receptors where acetylcholine acts to prevent poisoning (as in the treatment for poisoning by other acetylcholinesterase inhibitors). Atropine, however, is difficult to administer safely, because its effective dose for nerve agent poisoning is close to the dose at which patients suffer severe side effects, such as changes in heart rate and thickening of the bronchial secretions, which fill the lungs of someone suffering nerve agent poisoning so that suctioning of these secretions, and other advanced life support techniques, may be necessary in addition to administration of atropine to treat nerve agent poisoning. +In the treatment of nerve agent poisoning, atropine is most often administered along with a Hagedorn oxime such as pralidoxime, obidoxime, TMB-4, or HI-6, which reactivates acetylcholinesterase which has been inactivated by phosphorylation by an organophosphorus nerve agent and relieves the respiratory muscle paralysis caused by some nerve agents. Pralidoxime is not effective in reactivating acetylcholinesterase inhibited by some older nerve agents such as soman or the Novichok nerve agents, described in the literature as being up to eight times more toxic than the nerve agent VX. +The US Army has funded studies of the use of galantamine along with atropine in the treatment of a number of nerve agents, including soman and the Novichok agents. An unexpected synergistic interaction was seen to occur between galantamine (given between five hours before to thirty minutes after exposure) and atropine in an amount of 6 mg/kg or higher. Increasing the dose of galantamine from 5 to 8 mg/kg decreased the dose of atropine needed to protect experimental animals from the toxicity of soman in dosages 1.5 times the LD50 (lethal dose in half the animals studied). +There have been differing claims about the persistence of Novichok and binary precursors in the environment. One view is that it is not affected by normal weather conditions, and may not decompose as quickly as other organophosphates. However, Mirzayanov states that Novichok decomposes within four months. + +== Instances of usage == + +=== Poisoning of Ivan Kivelidi and Zara Ismailova === + +A Novichok agent was used in 1995 to poison Russian banker Ivan Kivelidi, who died three days later in a hospital at the age of 46. The poison was believed to have been applied to Kivelidi's office phone in Moscow. His secretary Zara Ismailova also developed symptoms one month later and then died a day later in a hospital at the age of 35. +Kivelidi was the head of the Russian Business Round Table, and had close ties to Viktor Chernomyrdin, who was at that time Prime Minister of Russia. Russian opposition–linked historians Yuri Felshtinsky and Vladimir Pribylovsky speculated that the murder became "one of the first in the series of poisonings organised by Russia's security services". +The Russian Ministry of Internal Affairs analysed the substance and announced that it was "a phosphorus-based military-grade nerve agent" "whose formula was strictly classified". According to Nesterov, the administrative head of Shikhany, he did not know of "a single case of such poison being sold illegally" and noted that the poison "is used by professional spies". +Vladimir Khutsishvili, a former business partner of Kivelidi's, was subsequently convicted of the killings. According to The Independent, "A closed trial found that his business partner had obtained the substance via intermediaries from an employee of the State Research Institute of Organic Chemistry and Technology (ГосНИИОХТ / GosNIIOKhT), which was involved in the development of Novichok agents. However, Khutsishvili, who claimed that he was innocent, had not been detained at the time of the trial and freely left the country. He was only arrested in 2006 after he returned to Russia, believing that the ten-year old case was closed. Felshtinsky and Pribylovsky claimed that Russia's security services, which had access to the chemical agent, had framed Khutsishvili for the murder, and that the security services had organised the murder on the orders of a senior Russian state official. Boris Kuznetsov, who represented Khutsishvili and believed in his innocence, blames "rogue intelligence officers". +Leonid Rink, an employee of GosNIIOKhT, received a one-year suspended sentence for selling Novichok agents to unnamed buyers "of Chechen ethnicity" soon after the poisoning of Kivelidi and Izmailova. + +=== Poisoning of Sergei and Yulia Skripal === \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Novichok-5.md b/data/en.wikipedia.org/wiki/Novichok-5.md new file mode 100644 index 000000000..586b16337 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Novichok-5.md @@ -0,0 +1,21 @@ +--- +title: "Novichok" +chunk: 6/7 +source: "https://en.wikipedia.org/wiki/Novichok" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:02.039256+00:00" +instance: "kb-cron" +--- + +On 12 March 2018, the UK government said that a Novichok agent had been used in an attack in the English city of Salisbury on 4 March 2018 in an attempt to kill former GRU officer Sergei Skripal and his daughter Yulia. British Prime Minister Theresa May said in Parliament: "Either this was a direct action by the Russian state against our country, or the Russian government lost control of its potentially catastrophically damaging nerve agent and allowed it to get into the hands of others." On 13 March the BBC asked Vladimir Putin if Russia was "behind the poisoning of" Skripal and he answered "Get to the bottom of it first then we can discuss it" while he delegated a spokesperson to claim that "a circus show in the British parliament" was the upshot. Boris Johnson, the Foreign Secretary, refused to shake hands with Russian ambassador Alexander Yakovenko as he expressed "outrage" over the attack. On the next day, the UK expelled 23 Russian diplomats after the Russian government refused to meet the UK's deadline of midnight on 13 March 2018 to give an explanation for the use of the substance. Addressing the United Nations Security Council on 15 March, Vassily Nebenzia, the Russian envoy to the UN, responded to the British allegations by denying that Russia had ever produced or researched the agents, stating: "No scientific research or development under the title Novichok were carried out." +After the attack, 21 members of the emergency services and public were checked for possible exposure, and three were hospitalised. As of 12 March, one police officer remained in hospital. Five hundred members of the public were advised to decontaminate their possessions to prevent possible long-term exposure, and 180 members of the military and 18 vehicles were deployed to assist with decontamination at locations in and around Salisbury. Up to 38 people in Salisbury have been affected by the agent to an undetermined extent. +Daniel Gerstein, a former senior official at the U.S. Department of Homeland Security, said it was possible that Novichok nerve agents had been used before in Britain to assassinate Kremlin targets, but had not been detected: "It's entirely likely that we have seen someone expire from this and not realised it. We realised in this case because they were found unresponsive on a park bench. Had it been a higher dose, maybe they would have died and we would have thought it was natural causes." +On 20 March 2018, Ahmet Üzümcü, Director-General of the OPCW, said that it would take "another two to three weeks to finalise the analysis" of samples taken from the poisoning of Skripal. On 3 April 2018, the Defence Science and Technology Laboratory announced that it was "completely confident" that the agent used was Novichok, although they still did not know the "precise source" of the agent. Experts said that their findings did not challenge the conclusions by UK government: "We provided that information to the Government who have then used a number of other sources to come to the conclusions that they have." On 12 April 2018 the OPCW announced that their investigations agreed with the conclusions made by the UK about the identity of the chemical used. +By September 2018, two Russian "tourists", "Alexander Petrov" and "Ruslan Boshirov", had been identified as suspects. They told Margarita Simonyan, the chief editor of RT television, in an interview that they both worked in the sports nutrition business and that: "Those are our real names.. We're afraid to go out, we fear for ourselves, our lives and lives of our loved ones." The Crown Prosecution Service announced enough evidence was obtained by that date "to convict the two men" of the attack, although it did not apply to Russia "for their extradition because Russia does not extradite its own nationals. [...] However, a European Arrest Warrant has been obtained in case they travel to the EU". +In February 2019, the Bellingcat website published precise allegations that identified GRU Major Denis Vyacheslavovich Sergeev as a man who travelled in March 2018 to London under the false identity of Sergei Fedotov. It is claimed with detailed photograph evidence, and phone, travel, passport, and motoring database records that GRU Colonels Alexander Mishkin and Anatoly Chepiga assumed the identities of Petrov and Boshirov, and placed the poison on Skripal's doorknob. On 28 June 2019, it was reported that Sergeyev received instructions from his GRU superior by cell phone on more than ten occasions during his UK visits. + +=== Poisoning of Charlie Rowley and Dawn Sturgess === + +On 30 June 2018, Charlie Rowley and Dawn Sturgess were found unconscious at a house in Amesbury, Wiltshire, about eight miles from the Salisbury poisoning site. On 4 July 2018, police said that the pair had been poisoned with the same nerve agent as ex-Russian spy Sergei Skripal. +On 8 July 2018, Sturgess died as a result of the poisoning. Rowley regained consciousness and began recovering in hospital. He told his brother Matthew the nerve agent had been in a small perfume or aftershave bottle, which they had found in a park about nine days before spraying themselves with it. The police later closed and fingertip-searched Queen Elizabeth Gardens in Salisbury. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Novichok-6.md b/data/en.wikipedia.org/wiki/Novichok-6.md new file mode 100644 index 000000000..061f433fd --- /dev/null +++ b/data/en.wikipedia.org/wiki/Novichok-6.md @@ -0,0 +1,49 @@ +--- +title: "Novichok" +chunk: 7/7 +source: "https://en.wikipedia.org/wiki/Novichok" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:02.039256+00:00" +instance: "kb-cron" +--- + +=== Poisoning of Emilian Gebrev === +In the aftermath of the Skripal poisoning, investigative journalists were able to track some of the people involved also in Bulgaria. This is how another suspected poisoning case dating back to April 2015 during their stay in the country was linked to the Novichok nerve agent. The victim was the Bulgarian arms dealer Emilian Gebrev, who shared two hypotheses why he might have been attacked: The first one links to the fact that his arms manufacturing company Dunarit exports defense equipment to Ukraine. The other one relates to an attempt by an offshore company to take over Dunarit. The takeover attempt was ultimately linked to the influential Bulgarian politician and oligarch Delyan Peevski who has historically been funded by Russia's state-owned VTB Bank. In November 2023 Bulgaria sought the extradition of three Russian GRU officers, Sergey Fedotov, Georgi Gorshkov and Sergey Pavlov, suspected of the poisoning incident. Sergei Fedotov was also the alias used by one of the assassins in the Salisbury poisonings. + +=== Poisoning of Alexei Navalny === + +On 20 August 2020, Russian opposition leader Alexei Navalny fell ill during a flight from Tomsk to Moscow. The plane made an emergency landing in Omsk, where Navalny was hospitalized and put in a medically induced coma. His family suspected his illness was caused by a poison put into a cup of tea he drank before the flight. He was evacuated to the Charité hospital in Berlin, Germany, the following day. On 2 September, the German government said that it had "unequivocal evidence" that Navalny was poisoned by a Novichok agent after tests at a German military lab and had called on the Russian government for an explanation, with labs in France and Sweden corroborating the findings. +On 4 September, the North Atlantic Council was briefed by the German representative on the "appalling assassination attempt on" Navalny. In a post-meeting press conference, Secretary-General Jens Stoltenberg said that NATO allies "agree that Russia has serious questions it must answer", that the OPCW needed to conduct an impartial investigation, that "those responsible for this attack must be brought to justice" and called on Russia to "provide complete disclosure of the Novichok programme to the OPCW." +Navalny had been out of his coma since 7 September. +On 6 October, the OPCW confirmed the presence of a cholinesterase inhibitor from the Novichok group in Navalny's blood and urine samples. At the same time, the OPCW report clarified that Navalny was poisoned with a new type of Novichok, which was not included in the list of controlled chemicals of the Chemical Weapons Convention. + +== See also == +Poison laboratory of the Soviet secret services +Russia and weapons of mass destruction + +=== List of Novichok agents === +A-230 +A-232 +A-234 +A-242 +A-262 (Novichok-7) +C01-A035 +C01-A039 +C01-A042 + +== References == + +=== Explanatory notes === + +=== Citations === + +=== General and cited references === + +== Further reading == +Kincaid C (February 1995), "Russia's Dirty Chemical Secret", American Legion Magazine, vol. 138, no. 2, American Legion, pp. 32–34, 58 + +== External links == + +Fedorov L (27 July 1994). "Chemical Weapons in Russia: History, Ecology, Politics". Federation of American Scientists. Archived from the original on 8 December 2000. +Russian chemical weapons at GlobalSecurity.org \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Poison_laboratory_of_the_Soviet_secret_services-0.md b/data/en.wikipedia.org/wiki/Poison_laboratory_of_the_Soviet_secret_services-0.md new file mode 100644 index 000000000..057b4c6dc --- /dev/null +++ b/data/en.wikipedia.org/wiki/Poison_laboratory_of_the_Soviet_secret_services-0.md @@ -0,0 +1,38 @@ +--- +title: "Poison laboratory of the Soviet secret services" +chunk: 1/3 +source: "https://en.wikipedia.org/wiki/Poison_laboratory_of_the_Soviet_secret_services" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:04.654443+00:00" +instance: "kb-cron" +--- + +The poison laboratory of the Soviet secret services, alternatively known as Laboratory 1, Laboratory 12, and Kamera (Russian: Камера, lit. 'The Cell (prison)'), was a covert research-and-development facility of the Soviet secret police agencies. Prior to the dissolution of the Soviet Union, the laboratory manufactured and tested poisons, and was reportedly reactivated by the Russian government in the late 1990s. +The laboratory activities were mentioned in the Mitrokhin archive. + +== Chronology == +1921: First poison laboratory within the Soviet secret services was established under the name "Special Office". It was operated by the Cheka and headed by professor of medicine Ignatii Kazakov, according to Pavel Sudoplatov. +1926: The laboratory was under the supervision of Genrikh Yagoda, a deputy of OGPU chairman Vyacheslav Menzhinsky, who became NKVD chief in 1934 after Menzhinsky's death. +February 20, 1939: It becomes Laboratory 1 headed by Grigory Mairanovsky. The laboratory was under the direct supervision of NKVD director Lavrenty Beria and his deputy Vsevolod Merkulov from 1939 to March 1953. Victims included the American Isaiah Oggins. +March 14, 1953: It was renamed to Laboratory 12. V. Naumov became the newly appointed head. Lavrenty Beria and Vsevolod Merkulov were executed after Stalin's death. Immediate NKVD supervisor of the laboratory, Pavel Sudoplatov, received a long term in prison. +1978: Expanded into the Central Investigation Institute for Special Technology within the First Chief Directorate of the KGB. +Since 1991: Several laboratories of the SVR (headquartered in Yasenevo near Moscow) were responsible for the "creation of biological and toxin weapons for clandestine operations in the West". + +== Human experimentation == +Mairanovsky and his colleagues tested a variety of lethal poisons on prisoners from the Gulags, including mustard gas, ricin, digitoxin, curare, cyanide, and many others. The objective of these experiments was to identify a tasteless, odorless chemical that could not be detected post mortem. Candidate poisons were administered to the victims along with a meal or drink, disguised as "medication". +Ultimately, a preparation meeting the desired criteria was developed and referred to as C-2 or K-2 (carbylamine choline chloride). According to witness testimonies, the victims experienced physical changes, such as a rapid weakening and diminishment in height, followed by a calm and silent demeanor, culminating in death within 15 minutes. Mairanovsky intentionally brought individuals of various physical conditions and ages into the laboratory to comprehensively understand the effects of each poison. +Pavel Sudoplatov and Nahum Eitingon approved specialized equipment (namely, poisons) only if it had been tested on "humans", as revealed in the testimony of Mikhail Filimonov. Vsevolod Merkulov stated that these experiments received authorization from NKVD chief Lavrentiy Beria. Following Stalin's death and Beria's subsequent arrest, Beria attested on August 28, 1953, that "I gave orders to Mairanovsky to conduct experiments on people sentenced to the highest measure of punishment, but it was not my idea". +In addition to human experimentation, Mairanovsky personally executed people with poisons, under the supervision of Sudoplatov. + +== Prominent victims == +1930: The leader of the Russian All-Military Union, general Alexander Kutepov, was drugged and kidnapped in Paris and died from a heart attack due to an overdose of the administered drug. +1936: Nestor Lakoba, Abkhaz Communist leader +1937: One of the leaders of the White movement and head of the Russian All-Military Union, Russian general Evgenii Miller, was drugged and kidnapped in Paris and later executed in Russia. +1938: Abram Slutsky (17 February 1938) +1940: Nikolai Koltsov, famous Russian biologist +1947: Cy Oggins was taken to Laboratory Number One (the "Kamera"), where Grigory Mairanovsky injected him with curare, which takes 10 to 15 minutes to kill +1947: Archbishop Theodore Romzha of the Ukrainian Catholic Church was killed by injection of curare provided by Mairanovsky and administered by a medical nurse who was a Ministry for State Security agent. +1971: Nobel prize laureate and dissident Alexander Solzhenitsyn was poisoned with what was later determined to be ricin. Solzhenitsyn survived the attempt. +1978: Dissident Bulgarian writer Georgi Markov was assassinated in London using a tiny pellet from an umbrella gun poisoned with ricin; the necessary equipment was prepared in this laboratory. In a Discovery Channel television program about his illustrated book of espionage equipment called The Ultimate Spy, espionage historian H. Keith Melton indicates that once the Bulgarian secret service had decided to kill Markov, KGB specialists from the Laboratory gave the Bulgarians a choice between two KGB tools that could be provided for the task: either a poisonous topical gelatin to be smeared on Markov, or an instrument to administer a poison pellet, as was eventually done. +1979: Attempted poisoning of the second President of Afghanistan Hafizullah Amin on December 13, 1979. Department 8 of KGB succeeded in infiltrating the illegal agent Mutalin Talybov (codenamed SABIR) as a chef of Amin's presidential palace. Some food intended for Amin and those close to him was successfully poisoned. Amin survived, but his son-in-law was flown to Moscow to be treated for acute food poisoning. An intelligence officer said of Amin that he "kept switching his food and drink as if he expected to be poisoned". \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Poison_laboratory_of_the_Soviet_secret_services-1.md b/data/en.wikipedia.org/wiki/Poison_laboratory_of_the_Soviet_secret_services-1.md new file mode 100644 index 000000000..d6ee67dcd --- /dev/null +++ b/data/en.wikipedia.org/wiki/Poison_laboratory_of_the_Soviet_secret_services-1.md @@ -0,0 +1,30 @@ +--- +title: "Poison laboratory of the Soviet secret services" +chunk: 2/3 +source: "https://en.wikipedia.org/wiki/Poison_laboratory_of_the_Soviet_secret_services" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:04.654443+00:00" +instance: "kb-cron" +--- + +== Alleged victims == +Russian writer Maxim Gorky and his son Max Peshkov. During the Trial of the Twenty-One in 1938, NKVD chief Genrikh Yagoda admitted that he poisoned Gorky and his son and unsuccessfully tried to poison his own deputy (and eventual successor) Nikolai Yezhov. The attempted poisoning of Yezhov was later officially dismissed as falsification, but Vyacheslav Molotov believed that the poisoning accusations were true. Yagoda was never officially rehabilitated (recognized as an innocent victim of political repressions) by Soviet authorities. +Soviet leader Joseph Stalin. Russian historians Anton Antonov-Ovseenko and Edvard Radzinsky believe that Stalin was poisoned by associates of NKVD chief Lavrentiy Beria, based on the interviews of a former Stalin bodyguard and numerous pieces of circumstantial evidence. Stalin planned to dismiss and execute Molotov and other senior members of the Soviet regime in 1953. According to Radzinsky, Stalin was poisoned by Khrustalev, a senior bodyguard briefly mentioned in the memoirs of Svetlana Alliluyeva, Stalin's daughter. +Georgi Dimitrov, the first Communist leader of Bulgaria, abruptly fell ill in 1949 and died in a Moscow hospital. According to some historians, Dimitrov was poisoned by the Soviet authorities on the orders of Stalin, due in part to his support for the proposed Balkan Federation. +Nikolai Khokhlov, a KGB defector who survived a thallium poisoning attempt in Frankfurt in 1957. +Alleged FSB victims +Lechi Ismailov, a Chechen rebel commander sentenced in Russia for nine years in prison died in September 2002 after an unsuccessful attempt to recruit him as an informer by FSB. Shortly after being transferred from the Lefortovo prison to a regular prison, he had a "farewell" cup of tea with the FSB officer after which fell fatally ill, lost his hair and died shortly after. +Roman Tsepov, a Russian businessman close to Vladimir Putin and Tambov Gang circles. +Amir Khattab, who was poisoned by a "a fast-acting nerve agent, possibly sarin or a derivative" transferred on a letter delivered by an FSB-recruited courier. +Yuri Shchekochikhin, a Russian journalist for the newspaper Novaya Gazeta, Shchekochikhin investigated apartment bombings allegedly directed by the Russian secret services and the Three Whales Corruption Scandal which involved high-ranking FSB. Shchekochikhin died from a fast and mysterious disease shortly before his departure to the US to testify before FBI investigators. His medical documentation was classified as "state secret" by Russian authorities. +Journalist Anna Politkovskaya. During the Beslan school hostage crisis in September 2004 and while on her way to Beslan to help in negotiations with the hostage-takers, Politkovskaya fell violently ill and lost consciousness after drinking tea given to her by an Aeroflot flight attendant. She survived. The drug was allegedly prepared in the FSB poison facility. Politkovskaya was later shot to death in her Moscow apartment building in 2006. +Former KGB agent Alexander Litvinenko. He was poisoned in a sushi bar in London in 2006. Traces of polonium-210 were found in his body. In a farewell letter, Litvinenko accused President Vladimir Putin of being behind the attack on his life. Litvinenko was critical of the Putin regime and accused the FSB of being behind the 1999 attacks in Russia. He died on 23 November 2006. +Viktor Kalashnikov, a freelance journalist and former KGB colonel, and his wife Marina Kalashnikova. In December 2010, the Charité hospital in Berlin discovered that they had been poisoned with mercury. Viktor Kalashnikov claimed it was the work of the FSB. +Karinna Moskalenko, a human rights lawyer who defended Litvinenko and other anti-Putin dissidents in court. She fell ill from mercury poisoning in October 2008, just prior to a hearing regarding the assassination of Anna Politkovskaya. Although initially alleged to be an attempt on her life, it was found by French police to be the result of a barometer broken in the car by the previous owner. +Viktor Yushchenko, the third President of Ukraine. Yuschenko was found to have been poisoned with TCDD dioxin during the 2004 Ukrainian presidential election campaign. In 2009, he accused Russia of shielding a number of witnesses to his poisoning, and called on the Russian government to turn them over. +Pyotr Verzilov, spokesman for the protest band Pussy Riot. Verzilov was admitted to a hospital in Moscow in September 2018, before being transferred to the Charité in Berlin. The German doctors believed it was "highly probable" that Verzilov was poisoned. +Vladimir Kara-Murza, opposition politician. Kara-Murza suddenly fell ill during a meeting in Moscow in May 2015, and was in a coma for more than a month. Coming on the heels of the assassination of Boris Nemtsov in Moscow that February, his family suspected he had been poisoned. Kara-Murza was hospitalized again for an alleged poisoning in February 2017. +Sergei Skripal, former GRU officer and double agent for the British SIS, and his daughter Yulia. On 4 March 2018, the Skripals were poisoned with a Novichok agent in Salisbury, United Kingdom, where Sergei had been living since 2010. Both eventually recovered; in 2020, they were reported to be living under new identities in New Zealand. +Emilian Gebrev, Bulgarian arms dealer. Gebrev, his son, and one of his business partners were allegedly poisoned in April 2015. British investigators traveled to Bulgaria in 2019 to investigate an alleged connection between Gebrev's poisoning and that of the Skripals in England in 2018. +Alexei Navalny, anti-corruption advocate and opposition leader. Navalny fell ill on a flight from Tomsk to Moscow on 20 August 2020, and placed into an induced coma at a hospital in Omsk. He was transferred to the Charité in Berlin two days later. Five laboratories certified by the Organisation for the Prohibition of Chemical Weapons confirmed the presence of a new type of Novichok agent. Navalny later died in prison in 2024, also suspected to be the result of poisoning. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Poison_laboratory_of_the_Soviet_secret_services-2.md b/data/en.wikipedia.org/wiki/Poison_laboratory_of_the_Soviet_secret_services-2.md new file mode 100644 index 000000000..595753a29 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Poison_laboratory_of_the_Soviet_secret_services-2.md @@ -0,0 +1,42 @@ +--- +title: "Poison laboratory of the Soviet secret services" +chunk: 3/3 +source: "https://en.wikipedia.org/wiki/Poison_laboratory_of_the_Soviet_secret_services" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:04.654443+00:00" +instance: "kb-cron" +--- + +== Planned victims == +President of the Socialist Federal Republic of Yugoslavia Josip Broz Tito. In the late 1940s, the laboratory manufactured a powdered plague for use in a small container and where the assassin was vaccinated against plague. The device was to be used against Tito, but MGB agent Iosif Grigulevich, who had previously organized the assault on the villa of Leon Trotsky and now received the assignment to kill Tito, was recalled after the death of Joseph Stalin. +FSB era +The first democratically elected President of the Republic of Georgia, Zviad Gamsakhurdia. According to former Deputy Director of Biopreparat Ken Alibek, this laboratory was possibly involved in the design of an undetectable chemical or biological agent to assassinate Gamsakhurdia. BBC News reported that some Gamsakhurdia friends believed he committed suicide, "although his widow insists that he was murdered." + +== Threatened dissidents == +The New York Times reported that Garry Kasparov, the chess champion and Putin opponent, drinks bottled water and eats prepared meals carried by his bodyguards. + +== See also == +Active measures +Biopreparat +List of poisonings +Nazi human experimentation +North Korean human experimentation +Project MKULTRA +Unethical human experimentation in the United States +Unit 731 (Japan) +United States chemical weapons program + +== Notes and references == + +== Sources == +PETLIURA, KONOVALETS, BANDERA - Three Leaders of Ukrainian Liberation Movement murdered by the Order of Moscow. Ukrainian Publishers Limited. 237, Liverpool Road, London, United Kingdom. 1962. (audiobook). +Ken Alibek and S. Handelman. Biohazard: The Chilling True Story of the Largest Covert Biological Weapons Program in the World - Told from Inside by the Man Who Ran it. 1999. Delta (2000) ISBN 0-385-33496-6 [1] +Vadim J. Birstein. The Perversion Of Knowledge: The True Story of Soviet Science. Westview Press (2004) ISBN 0-8133-4280-5. +Vasili Mitrokhin and Christopher Andrew, The World Was Going Our Way: The KGB and the Battle for the Third World, Basic Books (2005) hardcover, 677 pages ISBN 0-465-00311-7 +The Laboratory 12 poison plot, by Martin Sixsmith, The Sunday Times, April 8, 2007 +The KGB's Poison Factory, by Boris Volodarsky, Wall Street Journal, 7 April 2005 +History of Soviet poisonings (Russian) Archived March 19, 2009, at the Wayback Machine by Boris Sokolov grani.ru +Organic poison (Russian) Archived September 27, 2007, at the Wayback Machine by Vladimir Abarinov, grani.ru +Boris Volodarsky, The KGB’s Poison Factory: From Lenin to Litvinenko (London: Frontline Books, 2009) ISBN 1-84832-542-8 +Boris Volodarsky, Assassins: The KGB's Poison Factory 10 Years On (London: Frontline Books, 2019) ISBN 978-1-52673-392-4 \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Prince_Edward_Islands-0.md b/data/en.wikipedia.org/wiki/Prince_Edward_Islands-0.md new file mode 100644 index 000000000..99f9256c7 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Prince_Edward_Islands-0.md @@ -0,0 +1,26 @@ +--- +title: "Prince Edward Islands" +chunk: 1/4 +source: "https://en.wikipedia.org/wiki/Prince_Edward_Islands" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:39.411145+00:00" +instance: "kb-cron" +--- + +The Prince Edward Islands are two small uninhabited subantarctic volcanic islands in the southern Indian Ocean that are administered by South Africa. They are named Marion Island (named after Marc-Joseph Marion du Fresne, 1724–1772) and Prince Edward Island (named after Prince Edward, Duke of Kent and Strathearn, 1767–1820). +The islands in the group have been declared Special Nature Reserves under the South African Environmental Management: Protected Areas Act, No. 57 of 2003, and activities on the islands are therefore restricted to research and conservation management. Further protection was granted when the area was declared a marine protected area in 2013. The only human inhabitants of the islands are the staff of a meteorological and biological research station run by the South African National Antarctic Programme on Marion Island. + +== History == + +Barent Barentszoon Lam of the Dutch East India Company reached the islands on 4 March 1663 on the ship Maerseveen. They were named Dina (Prince Edward) and Maerseveen (Marion), but the islands were erroneously recorded to be at 41° South, and neither were found again by subsequent Dutch sailors. +In January 1772, the French frigate Le Mascarin, captained by Marc-Joseph Marion du Fresne, visited the islands and spent five days trying to land, thinking they had found Antarctica (then not yet proven to exist). Marion named the islands Terre de l'Espérance (Marion) and Ile de la Caverne (Prince Edward). After failing to land, Le Mascarin continued eastward, discovering the Crozet Islands and landing at New Zealand, where Marion du Fresne and some of his crew were killed by local Māori. +Julien Crozet, navigator and second in command of Le Mascarin, survived the disaster, and happened to meet James Cook at Cape Town in 1776, at the onset of Cook's third voyage. Crozet shared the charts of his ill-fated expedition, and as Cook sailed from Cape Town, he passed the islands on 13 December, but was unable to attempt a landing due to bad weather. Cook named the islands after Prince Edward, the fourth son of King George III; and though he is also often credited with naming the larger island Marion, after Captain Marion, this name was adopted by sealers and whalers who later hunted the area, to distinguish the two islands. +The first recorded landing on the islands was in 1799 by a group of French seal hunters of the Sally. Another landing in late 1803 by a group of seal hunters led by American captain Henry Fanning of the Catharine found signs of earlier human occupation. The islands were frequented by sealers until about 1810, when the local fur seal populations had been nearly eradicated. The first scientific expedition to the islands was led by James Clark Ross, who visited in 1840 during his exploration of the Antarctic, but was unable to land. Ross sailed along the islands on 21 April 1840. He made observations on vast numbers of penguins ("groups of many thousands each"), and other kinds of sea-birds. He also saw fur seals, which he supposed to be of the species Arctocephalus falklandicus. The islands were finally surveyed during the Challenger Expedition, led by Captain George Nares, in 1873. +The sealing era lasted from 1799 to 1913. During that period, visits by 103 vessels are recorded, seven of which ended in shipwreck. Sealing relics include iron trypots, the ruins of huts and inscriptions. The occasional modern sealing vessel visited from Cape Town, South Africa, in the 1920s. +The islands have been the location of other shipwrecks. In June 1849, the brig Richard Dart, with a troop of Royal Engineers under Lt. James Liddell, was wrecked on Prince Edward Island; only 10 of the 63 on board survived to be rescued by elephant seal hunters from Cape Town. In 1908, the Norwegian vessel Solglimt was shipwrecked on Marion Island, and survivors established a short-lived village at the north coast, before being rescued. The wreck of the Solglimt is the best-known in the islands, and is accessible to divers. +The British government never officially claimed ownership of the islands; however it did manage economic activities on the islands in the early 20th century. In 1908, the British government granted a guano lease on Marion Island. Following the Second World War, technological advancements made the islands more strategically important, and as no further economic activity was taking place, the UK was concerned other countries might claim the islands. In late 1947 and early 1948, South Africa, with Britain's agreement, annexed the islands and installed the meteorological station on Transvaal Cove on the north-east coast of Marion Island. +On 22 September 1979, a United States surveillance satellite known as Vela 6911 noted an unidentified double flash of light, known as the Vela incident, in the waters off the islands. There was and continues to be considerable controversy over whether this event was perhaps an undeclared nuclear test carried out by South Africa and Israel or some other event. The cause of the flash remains officially unknown, and some information about the event remains classified. Today, most independent researchers believe that the 1979 flash was caused by a nuclear explosion. +In 2003, the South African government declared the Prince Edward Islands a Special Nature Reserve, and in 2013 it declared 180,000 km2 (69,000 sq mi) of ocean waters around the islands a Marine Protection Area, thus creating one of the world's largest environmental protection areas. + +=== Marion Research Station === \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Prince_Edward_Islands-1.md b/data/en.wikipedia.org/wiki/Prince_Edward_Islands-1.md new file mode 100644 index 000000000..858921a76 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Prince_Edward_Islands-1.md @@ -0,0 +1,31 @@ +--- +title: "Prince Edward Islands" +chunk: 2/4 +source: "https://en.wikipedia.org/wiki/Prince_Edward_Islands" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:39.411145+00:00" +instance: "kb-cron" +--- + +On 4 January 1948 Marion Island and neighbouring Prince Edward Island were officially annexed into South Africa. A group of 14 sailors stayed on the island until 16 days later a permanent occupying force was left there, soon building a meteorological station. The 1948 research station on Marion Island was soon enlarged and today studies regional meteorology and the biology of the islands, in particular the birds (penguins, petrels, albatrosses, gulls) and seals. +A new research base was built from 2001 to 2011 to replace older buildings on the site. The access to the station is either by boat or helicopter. A helipad and storage hangar is located behind the main base structure. +In April 2017, scientists from McGill University, in collaboration with the South African National Antarctic Programme, launched a new astrophysical experiment on Marion Island called Probing Radio Intensity at high-Z from Marion (PRIZM), searching for signatures of the hydrogen line in the early universe. In 2018, another cosmology experiment was launched by the McGill team called Array of Long Baseline Antennas for Taking Radio Observation from Sub-Antarctic (ALBATROS). The new experiment aims to create very high-resolution maps of the low-frequency radio emission from the universe, and take first steps towards detecting the cosmological Dark Ages. +In April 2024, the South African National Antarctic Programme station on Marion Island was depicted in an ad for KFC South Africa directed by Kim Geldenhuys, called "Beyond the Sea", which depicted two South Africans trying to get back to the mainland for fried chicken. + +== Geography and geology == +The island group is about 955 nmi (1,769 km; 1,099 mi) south-east of Port Elizabeth in mainland South Africa. At 46 degrees latitude, it is just over halfway between the equator and the South Pole. Marion Island (46°54′45″S 37°44′37″E), the larger of the two, is 25.03 km (15.55 mi) long and 16.65 km (10.35 mi) wide with an area of 297 km2 (115 sq mi) and a coastline of some 72 km (45 mi), most of which is high cliffs. The highest point on Marion Island is Mascarin Peak (formerly State President Swart Peak), reaching 1,242 m (4,075 ft) above sea level. The topography of Marion Island includes many hillocks and small lakes, and boggy lowland terrain with little vegetation. +Prince Edward Island (46°38′39″S 37°56′36″E) is much smaller—only 46 km2 (18 sq mi), 10.23 km (6.36 mi) long and 6.57 km (4.08 mi) wide—and lies some 12 nmi (22.2 km; 13.8 mi) to the north-east of Marion Island. The terrain is generally rocky, with high cliffs (490 m (1,608 ft)) on its south western side. At the van Zinderen Bakker Peak north-west of the center, it reaches a height of 672 m (2,205 ft). +There are a few offshore rocks along the northern coast of Prince Edward Island, like Ship Rock 100 m (328 ft) north of northernmost point, and Ross Rocks 500 m (1,640 ft) from the shore. Boot Rock is about 500 m (1,640 ft) off the northern coast of Marion Island. +Both islands are of volcanic origin. Marion Island is one of the peaks of a large underwater shield volcano that rises some 5,000 m (16,404 ft) from the sea floor to the top of Mascarin Peak. The volcano is active, with eruptions having occurred between 1980 and 2004. While Prince Edward Island may have erupted within the last 10 thousand years. + +=== Climate === +Despite being located inside the south temperate zone at 46 degrees latitude, the islands have a tundra climate. They lie directly in the path of eastward-moving depressions all year round and this gives them an unusually cool and windy climate. Strong regional winds, known as the roaring forties, blow almost every day of the year, and the prevailing wind direction is north-westerly. Annual rainfall averages from 2,400 mm (94.5 in) up to over 3,000 mm (118.1 in) on Mascarin Peak. In spite of its very chilly climate it is located closer to the equator than mild northern hemisphere climates such as Paris and Seattle and only one degree farther south than fellow southern hemisphere climates such as Comodoro Rivadavia in Argentina and Alexandra in New Zealand. Many climates on lower latitudes in the Northern hemisphere have far colder winters than Prince Edward Islands due to the islands' maritime moderation, even though temperatures in summer are much cooler than those normally found in maritime climates. +The islands are among the cloudiest places in the world; about 1300 hours a year of sunshine occur on the sheltered eastern side of Marion Island, but only around 800 hours occur away from the coast on the wet western sides of Marion and Prince Edward Islands. +Summer and winter have fairly similar climates with cold winds and threat of snow or frost at any time of the year. However, the mean temperature in February (midsummer) is 7.7 °C (45.9 °F) and in August (midwinter) it is 3.9 °C (39.0 °F). + +== Flora and fauna == + +The islands are part of the Southern Indian Ocean Islands tundra ecoregion that includes a small number of subantarctic islands. Because of the paucity of land masses in the Southern Ocean, the islands host a wide variety of species and are critical to conservation. In the cold subantarctic climate, plants are mainly limited to grasses, mosses, and kelp, while lichens are the most visible fungi. The main indigenous animals are insects (such as the seaweed-eating weevil Palirhoeus eatoni) along with large populations of seabirds, seals and penguins. + +=== Birds === \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Prince_Edward_Islands-2.md b/data/en.wikipedia.org/wiki/Prince_Edward_Islands-2.md new file mode 100644 index 000000000..f49f2dcc7 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Prince_Edward_Islands-2.md @@ -0,0 +1,33 @@ +--- +title: "Prince Edward Islands" +chunk: 3/4 +source: "https://en.wikipedia.org/wiki/Prince_Edward_Islands" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:39.411145+00:00" +instance: "kb-cron" +--- + +The islands have been designated an Important Bird Area (IBA) by BirdLife International for their significant seabird breeding populations. At least thirty different species of birds are thought to breed on the islands, and it is estimated the islands support upwards of 5 million breeding seabirds, and 8 million seabirds total. Five species of albatross (of which all are either threatened or endangered) are known to breed on the islands, including the wandering albatross, dark-mantled, light-mantled, Indian yellow-nosed and grey-headed albatross. +The islands also host fourteen species of petrel, four species of prion, the Antarctic tern, and the brown skua, among other seabirds. Four penguin species are found: king penguins, Eastern rockhoppers, gentoos and macaroni penguins. + +=== Mammals === +Three species of seal breed on the islands: the southern elephant seal, the Antarctic fur seal, and the Subantarctic fur seal. The waters surrounding the islands are often frequented by several species of whale, especially orcas, which prey on penguins and seals. Large whales such as southern rights and southern humpbacks, and leopard seals are seen more sporadically, and it remains unclear how large or stable their current local populations are, though it is thought their numbers are significantly down compared to the time of first human contact with the islands. +The area saw heavy sealing and whaling operations in the nineteenth century and continued to be subject to mass illegal whaling until the 1970s, with the Soviet Union and Japan allegedly continuing whaling operations into the 1990s. Currently, the greatest ecological threat is the longline fishing of Patagonian toothfish, which endangers a number of seabirds that dive into the water after baited hooks. + +=== Terrestrial plants === +Like all subantarctic islands, Marion has a small number of native plant species. The isolation of the island and the cold, wet, windy weather conditions filtered out many potential plants from reaching and successfully establishing populations. Only 22 vascular plants were native to the island prior to human arrival. One of them, Ranunculus moseleyi, a species also found in the Kerguelen Islands, is of uncertain status with no records of it being found since 1969 and no specimens in archives to unambiguously prove its presence prior to that date. +There are seven species of fern and fern allies include Antarctic hard-fern (Austroblechnum penna-marina), alpine filmy-fern (Hymenophyllum peltatum), Magellanic clubmoss (Lycopodium magellanicum), Notogrammitis crassior, Phlegmariurus saururus, Polystichum marionense, and Elaphoglossum randii. +The island has five species of cushion and mat forming flowering plants Azorella selago, Callitriche antarctica, Colobanthus kerguelensis, Crassula moschata, Leptinella plumosa. Other herbaceous plants include Kerguelen cabbage (Pringlea antiscorbutica), Antarctic buttercup (Ranunculus biternatus), Limosella australis, and blinks (Montia fontana). +Several grass-like species grow on Marion including the rush Juncus scheuchzerioides, Cook's tussock-grass (Poa cookii), Polypogon magellanicus. The sedge species Carex dikei is endemic to Marion and Prince Edward Island, but was only scientifically described in 2015. Further research is needed to determine if records of Carex austrocompacta on other subantarctic islands might be this species. + +=== Invasive species === +The wildlife is particularly vulnerable to introduced species and the historical problem has been with cats and mice. House mice arrived to Marion Island with whaling and sealing ships in the 1800s and quickly multiplied, so much so that in 1949, five domestic cats were brought to the research base to deal with them. The cats multiplied quickly, and by 1977 there were approximately 3,400 cats on the island, feeding on burrowing petrels in addition to mice, and taking an estimated 455,000 petrels a year. Some species of petrels soon disappeared from Marion Island, and a cat eradication programme was established. A few cats were intentionally infected with the highly specific feline panleukopenia virus, which reduced the cat population to about 600 by 1982. The remaining cats were killed by nocturnal shooting, and in 1991 only eight cats were trapped in a 12-month period. +It is believed that no cats remain on Marion Island today, and with the cats gone, the mouse population has sharply increased to "plague like" levels. In 2003, ornithologists discovered that in the absence of other food sources, the mice were attacking albatross chicks and eating them alive as they sat helplessly on their nests. A similar problem has been observed on Gough Island, where a mouse eradication programme began in 2021. A programme to eradicate invasive rats on South Georgia Island was completed in 2015, and as of 2016 the island appears to be completely rat free. The geography of Marion Island presents certain obstacles not found on either Gough or South Georgia islands, particularly its large size, high elevations and variable weather. An assessment of the island was completed in May 2015, led by noted invasive species ecologist John Parkes, with the general conclusion that an eradication programme is feasible, but will require precise planning. +Both Gough Island and the Prince Edward Islands also suffer from invasive procumbent pearlwort (Sagina procumbens), which is transforming the upland ecosystem and is now considered beyond control. + +== Legal status == + +Marion Island and Prince Edward Island were claimed for South Africa on 29 December 1947 and 4 January 1948 respectively, by a South African Navy force from HMSAS Transvaal under the command of John Fairbairn. On 1 October 1948 the annexation was made official when Governor-General Gideon Brand van Zyl signed the Prince Edward Islands Act, 1948. In terms of the Act, the islands fall under the jurisdiction of the Cape Town Magistrate's Court, and South African law as applied in the Western Cape applies on them. The islands are also deemed to be situated within the electoral district containing the Port of Cape Town; as of 2016, this is ward 115 of the City of Cape Town. + +== Amateur radio == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Prince_Edward_Islands-3.md b/data/en.wikipedia.org/wiki/Prince_Edward_Islands-3.md new file mode 100644 index 000000000..368f42d09 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Prince_Edward_Islands-3.md @@ -0,0 +1,43 @@ +--- +title: "Prince Edward Islands" +chunk: 4/4 +source: "https://en.wikipedia.org/wiki/Prince_Edward_Islands" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:39.411145+00:00" +instance: "kb-cron" +--- + +As of 2014, Marion Island, prefix ZS8, was the third-most wanted DXCC "entity" by the amateur radio community. By the end of 2014, it had dropped to 27th, after simultaneous activity by three licencees in the 2013/2014 team. However, their activity was mainly on voice. On Morse telegraphy, the Islands remain the second-most wanted entity after North Korea, while on data they are sixth out of 340. + +== See also == +Crozet Islands +Gough Island +List of Antarctic islands north of 60° S +List of protected areas of South Africa +List of sub-Antarctic islands +Prince Edward fracture zone +S. A. Agulhas +S. A. Agulhas II +SANAE +South African National Antarctic Programme +Vela incident + +== Citations == + +== General and cited sources == +LeMasurier, W. E.; Thomson, J. W., eds. (1990). Volcanoes of the Antarctic Plate and Southern Oceans. American Geophysical Union. ISBN 978-0-87590-172-5. +"Marion Island". Global Volcanism Program. Smithsonian Institution. +"Prince Edward Island". Global Volcanism Program. Smithsonian Institution. +Jenkins, Geoffrey (1979). Southtrap. William Collins, Sons and Co Ltd. ISBN 978-0-00-616116-5. +Ross, James Clark (1847). A Voyage of Discovery and Research in the Southern and Antarctic Regions . London: John Murray – via Wikisource. +de Bruyn P.J.N.; Oosthuizen W.C., eds. (2017). "Pain forms the Character: Doc Bester, Cat hunters & Sealers". Antarctic Legacy of South Africa. ISBN 978-0-620-74912-1. + +== External links == + +South African Research station on Marion Island – official website +Facebook Pages – Marion Island team publications +Facebook Groups – Marion Island team discussions +Marion Island seal and killer whale research – Official Marion Island Marine Mammal Programme website +No Pathway Here – An account of the annexation of the islands +Earth Observatory – Image of the Day 18 October 2009 \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Pul-e-Charkhi_prison-0.md b/data/en.wikipedia.org/wiki/Pul-e-Charkhi_prison-0.md new file mode 100644 index 000000000..9255653b9 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Pul-e-Charkhi_prison-0.md @@ -0,0 +1,66 @@ +--- +title: "Pul-e-Charkhi prison" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Pul-e-Charkhi_prison" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:05.868653+00:00" +instance: "kb-cron" +--- + +Pul-e-Charkhi prison (Dari: زندان پل چرخی), also known as the Afghan National Detention Facility, is a maximum-security prison located next to the Ahmad Shah Baba Mina neighborhood in the eastern part of Kabul, Afghanistan. It has the capacity to house 14,000 inmates, but as of October 2024 it only has around 5,000 inmates, most of whom have been arrested and convicted within the jurisdiction of Kabul Province. It is considered the country's largest prison. + + +== History == +Construction of Pul-e-Charkhi prison began in the 1970s by order of former president Mohammed Daoud Khan and was completed during the 1980s. It became notorious for torture and executions after the 1978 Saur Revolution as well as during the ten-year Soviet-Afghan War that followed. Some claim that between April 1978 and December 1979, the communist People's Democratic Party of Afghanistan (PDPA) under Nur Muhammad Taraki, executed around 27,000 political prisoners at Pul-e-Charkhi. In 1978, a few days after the Saur Revolution, Nur Muhammad Taraki's government remanded mullahs who called for a jihad against the PDPA to Pul-e-Charkhi. In January 1980, Babrak Karmal's regime released around 2,000 inmates as the result of a political promise prior to coming into power. Locals were angry that around 100 inmates weren't released, resulting in a large prison protest turned riot with thousands of attendees, ultimately resulting in a prison break that released some of the remaining 100 inmates. More recently, the Afghan National Army's 111th Capital Division was based near Pul-e-Charkhi prison. + + +=== Executions === + +Pul-e-Charkhi has been the country's main execution facility. Notable executions include that of juvenile terrorist Zar Ajam and another man who were executed in June 2011 for a terrorist attack against New Kabul Bank in Jalalabad in February of that year. + + +=== Mass grave === + +In December 2006, a communist-era mass grave, close to the Pul-e-Charkhi prison, was discovered by the NATO-led International Security Assistance Force. It is believed that the grave held some 2,000 bodies. Officials of the Afghan Ministry of Information and Culture believe that the massacre took place between 1978 and 1986 when the Moscow-backed communist presidents, Nur Muhammad Taraki, Hafizullah Amin and Babrak Karmal were in power. + + +=== Living conditions === +Living conditions of the prisoners have been criticized by several human rights groups. The prison had been cited as overcrowded and the living conditions as sub-par. There had been eight cell blocks but only three were being used which has caused overcrowding. There are also about 70 female prisoners who are housed in a special female section of the prison. + + +=== Riots and escapes === +In December 2004, foreign prisoners attacked guards with razor blades. A subsequent shoot-out left one Iraqi and three Pakistani prisoners and four Afghan police dead. +In January 2006, seven prisoners escaped by mingling with visitors. A month later, a riot was sparked by a new prison policy forcing prisoners to wear bright orange clothing, a rule enacted to avoid events similar to the January escape. The February 2006 riot resulted in six deaths and 22 injured, according to the International Committee of the Red Cross. The rioters used makeshift weapons to attack guards, then ignited furniture on fire, and smashed doors and windows. They eventually took over a wing of the prison and held it for a few days. The riot finally ended on the first of March. +On 16 March 2008, after a two-week dispute over arrests following an attempted jail-break, inmates rioted and took over sections of the building. Gunfire was heard in the complex and inmates claimed to be holding hostage two members of the Afghan National Army (ANA). The hostage-takers threatened to kill the ANA members unless mediators were sent in to resolve the conflict. + + +=== Renovation and expansion === + +The prison has been renovated in recent years with assistance from the United States, including the United States Army Corps of Engineers. In 2007, the U.S. military began transferring some of its detainees from Bagram Air Base in Afghanistan to the Pul-e-Charkhi prison. By January 2008, as many as 125 detainees from the Parwan Detention Facility and 32 detainees from the U.S. Guantanamo Bay detention camp had been transferred to Pul-e-Charkhi. This was followed by the transfer of some 250 more detainees. +The United States repeatedly announced that it will be shutting down its Guantanamo Bay detention camps, in Cuba. The Americans planned to transfer most of the captives held in extrajudicial detention in Guantanamo, and in its less well known Parwan Detention Facility to Afghan custody. +The initial plan called for reducing the maximum number of men held per cell from the current eight, to just two. For security reasons every cell would be equipped with its own toilet, replacing the current insecure method of letting all the captives leave their cells and share a single toilet at the end of each cell block. +Under this initial plan, the modernization of this wing cost $20 million, and would have a maximum capacity of 670 captives. However, after a tour of the facility, during its modernization, it was realized that, for cultural reasons, captives could not be expected to share a toilet with another man. Afghan cultural modesty would not allow a captive to use a toilet with another man present, cutting the capacity of the modernized facility in half. +On May 6, 2007, two American soldiers, Colonel James W. Harrison Jr. and Master Sergeant Wilberto Sabalu, part of the oversight team, were shot dead by one of the Afghan guards. This forced a delay on construction as all the guards underwent new security checks. Finally, there was controversy within the Afghan government as to which ministry would be responsible for the modernized part of the prison. +By January 2008, 32 captives from the Guantanamo Bay detention camp and 125 captives from the Parwan Detention Facility had been transferred to Pul-e-Charkhi. The Center for Constitutional Rights reported that all of the Afghans repatriated to Afghanistan from April 2007 were sent to the Pul-e-Charkhi prison. +In February 2009, a team from the United Kingdom's Channel 4 toured the American wing of the prison. By September 2009 the United States had transferred some 250 former detainees from its Guantanamo Bay detention camp to Pul-e-Charkhi, often to the shock of their waiting families, according to Human Rights First. + + +=== 2021 === +On August 15, 2021, management of the prison was taken over by forces of the Taliban after the fall of President Ashraf Ghani's government. The Taliban released all of the inmates from the jail, including many of their fellow members. + + +== See also == +List of prisons in Afghanistan + + +== References == + + +== External links == + +150 foreigners currently in prison in Afghanistan, Ariana News, Sept. 1, 2024. +Mawlawi Kabir: Kabul Aware of Intelligence Objectives of Other Countries, TOLOnews, May 22, 2024. +Human Rights First; Undue Process: An Examination of Detention and Trials of Bagram Detainees in Afghanistan in April 2009 (2009) +Human Rights First; Arbitrary Justice: Trial of Guantánamo and Bagram Detainees in Afghanistan (2008) +Lyse Doucet's (BBC Newsnight, Afghanistan) full film from inside Pul-e-Charkhi prison \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-0.md b/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-0.md new file mode 100644 index 000000000..8a413907e --- /dev/null +++ b/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-0.md @@ -0,0 +1,28 @@ +--- +title: "Russia and weapons of mass destruction" +chunk: 1/6 +source: "https://en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:07.180824+00:00" +instance: "kb-cron" +--- + +The Russian Federation possesses the world's largest arsenal of nuclear weapons, with 5,459 nuclear warheads, with 1,718 deployed. It also inherited the expansive Soviet biological and chemical weapons programs, and is suspected to have continued them. It is one of the five nuclear-weapon states recognized under the Treaty on the Non-Proliferation of Nuclear Weapons and one of the five countries wielding a nuclear triad. It inherited its weapons and treaty obligations from the Soviet Union. Russia has been alleged to violate the Biological Weapons Convention and Chemical Weapons Convention. +As of 2025, Russia's triad of strategic nuclear weapons, at approximately 2,832 weapons, comprises 1,254 warheads on its Strategic Rocket Forces' 333 intercontinental ballistic missiles, 992 warheads on its Navy's 192 RSM-56 Bulava and R-29RMU Sineva/Lajner submarine-launched ballistic missiles, on twelve Delfin and Borei-class submarines, and 586 cruise missiles or bombs, for delivery by Long Range Aviation's 67 Tupolev Tu-160 and Tu-95 strategic bombers. Russia also possesses the world's largest arsenal of tactical nuclear weapons, approximately 1,500, which can be delivered by land, sea, and air-launched weapons. The Russian Space Forces oversee early warning and ballistic missile defense, operating radars such as Voronezh and Don-2N, the Oko and EKS satellites, and the anti-ballistic missile A-135, S-400, and S-300 systems, all of which can themselves be tipped with nuclear warheads. +Russia's predecessor state, the Soviet Union, held the largest nuclear arsenal in history, at 45,000 nuclear warheads in 1986. Russia and the United States together hold 88% of the world's nuclear weapons. The New START treaty limited the number each state could deploy, until its expiration in February 2026. Officially, Russian nuclear weapons use requires an order from the President, co-signed by the Minister of Defence or Chief of the General Staff. Russia extends a nuclear umbrella to member states of the Collective Security Treaty Organization. +Since its 2022 invasion of Ukraine, Russia has frequently made threats characterized as nuclear blackmail. Since 2023, Russia has provided tactical nuclear weapons systems to Belarus. Ukraine destroyed several Russian nuclear-capable strategic bombers in a large drone attack in 2025. Since 2024, Russian policy has broadly allowed nuclear first use, with strategic ambiguity on thresholds, in response to attacks on Russia with weapons of mass destruction, or to conventional attacks that critically threaten its sovereignty, territorial integrity, nuclear forces, or to large air and missile attacks. +The Soviet Union carried out 715 nuclear tests, from its first test in 1949, until 1990. This included its first thermonuclear test in 1955, and the 1961 Tsar Bomba, by far the largest nuclear test ever at 50 megatons. Testing occurred at Semipalatinsk, Novaya Zemlya, and Kapustin Yar. Russia signed and ratified the Comprehensive Nuclear-Test-Ban Treaty in 1996 but withdrew ratification in 2023. Russia's nuclear complex, managed by Rosatom, inherited the world's largest stockpiles of weapons-grade plutonium and highly enriched uranium, theoretically equivalent to over 40,000 weapons; Ural Electrochemical Combine remains the world's largest uranium enrichment site, and Mayak the world's second largest reprocessing site. +Russia inherited the Soviet biological weapons and chemical weapons programs, each the world's largest, and US intelligence assesses Russia maintains offensive biological and chemical warfare programs. Biological agents were researched from the 1920s, and in contravention of the Biological Weapons Convention from 1975. At its peak, the program employed ~65,000 people. The 1979 Sverdlovsk anthrax leak revealed the existence of the program to the Western Bloc. In 1997, Russia declared an arsenal of 39,967 tons of chemical weapons, officially declared destroyed in 2017. Russia was accused of using Novichok nerve agent in the 2018 poisoning of Sergei and Yulia Skripal and 2020 poisoning of Alexei Navalny. Russian forces admitted their use of CS gas during the Russo-Ukrainian war, in violation of the Chemical Weapons Convention. Russia was also accused of using a radiological weapon in the form of polonium-210 in the poisoning of Alexander Litvinenko in London. + +== Nuclear weapons == + +=== History === + +==== Soviet era ==== + +==== Production sites ==== +Three sites in the Russian SFSR and subsequently Russia produced 145 tons of weapons-grade plutonium (uncertainty ±8 tons) from 1948 to 2010, with a consistent production peak between 1967 and 1989. Following the Moscow test reactor F-1 in 1946, the Mayak site in Chelyabinsk-40 began construction. The first plutonium production reactor A-1 began operation in 1948, fuelling the RDS-1 test. The Mayak site received nine further reactors were constructed. Of these, four were used for plutonium production, the other six reactors primarily produced tritium for thermonuclear weapons. Plutonium was also produced by five reactors at the Siberian Chemical Combine in Tomsk-7, and three reactors at the Mining and Chemical Combine in Krasnoyarsk-26. The last plutonium production reactor in Russia is believed to have shut down in 2010. Mayak continues to operate two reactors for tritium and industrial radioisotope production. +Russian sites also produced 1,250 tons of highly enriched uranium (uncertainty ±120 tons) from 1949 to 2010, excluding HEU produced for naval nuclear reactors. Of this, 500 tons was downblended by the Megatons to Megawatts Program, and a further hundred tons were used in production research reactors, nuclear tests, and other downblending programs. Russia is now believed to possess 656 tons between HEU stockpiles and HEU inside weapons themselves. This began with the SU-20 electromagnetic separation plant, but the Soviet project quickly followed the Manhattan Project's gaseous diffusion scheme, constructing the D-1 plant in Sverdlovsk-44, eventually becoming the Ural Electrochemical Combine. The D-1 plant could produce 0.01 million SWU/year. The development of the gas centrifuge and waves of modernizations brought the Ural Electrochemical Combine to 11.9 million SWU/year by 1993. Further enrichment plants were built at the Siberian Chemical Combine, the Zelenogorsk Electrochemical Plant and the Angarsk Electrochemical Combine. + +==== Post-Soviet era ==== \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-1.md b/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-1.md new file mode 100644 index 000000000..061537b95 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-1.md @@ -0,0 +1,39 @@ +--- +title: "Russia and weapons of mass destruction" +chunk: 2/6 +source: "https://en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:07.180824+00:00" +instance: "kb-cron" +--- + +Post-Soviet countries have signed a series of treaties and agreements to settle the legacy of the former Soviet Union multilaterally and bilaterally. +At the dissolution of the Soviet Union in 1991, Soviet nuclear weapons were deployed in four of the new republics: Russia, Ukraine, Belarus and Kazakhstan. In May 1992, these four states signed the Lisbon Protocol, agreeing to join the Treaty on the Non-Proliferation of Nuclear Weapons, with Russia the continuator state to the Soviet Union as a nuclear state, and the other three states joining as non-nuclear states. +Ukraine agreed to give up its weapons to Russia, in exchange for guarantees of Ukrainian territory from Russia, the United Kingdom, and the United States, known as the Budapest Memorandum on Security Assurances. China and France also made statements in support of the memorandum. + +==== Russian invasion of Ukraine ==== + +During the Russian invasion of Ukraine that began in 2022, Russian President Vladimir Putin placed Strategic Rocket Forces's nuclear deterrence units on high alert, a move heavily condemned internationally. Putin warned that "whoever tries to hinder us in Ukraine would see consequences, you have never seen in your history". According to the former US Director of National Intelligence, Avril Haines, Putin could potentially turn to nuclear weapons if he perceived an "existential threat" to the Russian state or regime; there has been speculation that he could regard defeat in Ukraine as an existential threat to his regime. +According to a peer-reviewed study published in the journal Nature Food in August 2022, a full-scale nuclear war between the United States and Russia, which together hold more than 90% of the world's nuclear weapons, would kill 360 million people directly and more than 5 billion indirectly by starvation during a nuclear winter. +In September 2022, Putin announced the mobilization of Russian forces, and threatened nuclear retaliation against the west if Russia's territorial integrity was threatened. +On February 21, 2023, Putin suspended Russia's participation in the New START nuclear arms reduction treaty with the United States, saying that Russia would not allow the US and NATO to inspect its nuclear facilities. On March 25, 2023, Putin announced that Russia would be stationing tactical nuclear operations in Belarus. On June 14, 2023, Belarusian President Aleksander Lukashenko stated that Belarus had started to take delivery of nuclear weapons in a TV interview with Russian state channel, Russia-1. +On 25 September 2024, Putin warned the West that if attacked with conventional weapons Russia would consider a nuclear retaliation, in an apparent deviation from the no first use doctrine. Putin also warned nuclear powers that if they supported another country's attack on Russia, they would be considered participants in such aggression. Putin has made several implicit nuclear threats since the outbreak of war against Ukraine. Experts say Putin's announcement was aimed at dissuading the United States, the United Kingdom and France from allowing Ukraine to use Western-supplied long-range missiles such as the Storm Shadow and ATACMS in strikes against Russia. + +=== Nuclear testing === + +==== Soviet nuclear testing ==== + +==== Alleged Russian nuclear testing ==== +The US alleged in 2020 that Russia had carried out "nuclear weapons experiments that have created nuclear yield" between 1996 and 2019, but that it was not aware of such individual experiments in 2019. As Russia is a signatory of the Comprehensive Nuclear-Test-Ban Treaty, but the treaty is not in force, the legal status of such an experiment is unclear. The same report accused China's nuclear weapons program of constructing the infrastructure for undetectable low-yield tests, but did not allege any tests had occurred. + +=== Arms reduction === + +The threat of nuclear warfare was a persistent and terrifying threat during the Cold War. At its height, the Soviet Union and United States each mustered tens of thousands of warheads, under the doctrine of mutual assured destruction. By the 1980s, both the United States and Soviet Union sought to reduce the number of weapons the other was fielding. This led to the opening of arms reduction talks in 1982. +This culminated in the signing of the START I treaty in 1991: the first nuclear arms reduction treaty between the two global powers. This first treaty limited the number of deployed warheads in each nation to 6,000, nearly halving the prior 10,000 to 12,000 being fielded in 1991. The considerable success of START I, combined with the dissolution of the Soviet Union in 1991, led to the START II treaty. Russia never ratified the treaty, and it did not go into effect. An attempted START III was attempted but could not get past negotiations. +Instead, the Strategic Offensive Reductions Treaty was passed in 2002, capping warheads at 2,200. The current limitations stem from the New START treaty, ratified in 2010. It limits each side to 1,550 weapons. Nuclear bombers only count as one weapon each, even though they may carry up to 20, so the actual limit on the countries is slightly higher. The treaty is in force through to 2026. +After U.S. President George W. Bush withdrew from the 1972 Anti-Ballistic Missile Treaty, Russia responded by building-up their nuclear capabilities, in such a way as to counterbalance U.S. capabilities. Russia decided not to sign the UN Treaty on the Prohibition of Nuclear Weapons, which was adopted on July 7, 2017, by 122 States. Most analysts agree that Russia's nuclear strategy under Putin eventually brought it into violation of the 1987 Intermediate-Range Nuclear Forces Treaty (although this is not confirmed). +According to Russian officials, the American decision to deploy the missile defense system in Europe was a violation of the treaty. U.S. President Donald Trump announced on October 20, 2018, that the U.S. would no longer consider itself bound by the treaty's provisions, raising nuclear tensions between the two powers. +On November 2, 2023, Putin signed a law that withdraws Russia's ratification of the Comprehensive Nuclear-Test-Ban Treaty. + +=== Delivery systems === \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-2.md b/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-2.md new file mode 100644 index 000000000..783f13a7a --- /dev/null +++ b/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-2.md @@ -0,0 +1,26 @@ +--- +title: "Russia and weapons of mass destruction" +chunk: 3/6 +source: "https://en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:07.180824+00:00" +instance: "kb-cron" +--- + +The exact number of nuclear warheads is a state secret and is therefore a matter of guesswork. As of 2025, the Federation of American Scientists estimates that Russia possesses 5,459 nuclear weapons, while the United States has 5,177; Russia and the U.S. each have about 1,700 active deployed strategic nuclear warheads. Russia's stockpile is growing in size, while the United States' is shrinking. Russia has six nuclear missile fields in Kozelsk, Tatishchevo, Uzhur, Dombarovsky, Kartalay, and Aleysk; nuclear missile submarines patrolling from three naval bases at Nerpich'ya, Yagel'Naya, and Rybachiy; and nuclear bombers at Ukrainka and Engels air bases. As of 2024, Russia operates 12 nuclear-powered, nuclear-armed ballistic missile submarines, comprising five Delta-class and seven Borei-class vessels. +The RS-28 Sarmat (Russian: РС-28 Сармат; NATO reporting name: SATAN 2), is a Russian liquid-fueled, MIRV-equipped, super-heavy thermonuclear armed intercontinental ballistic missile in development by the Makeyev Rocket Design Bureau since 2009, intended to replace the previous R-36 missile. Its large payload would allow for up to 10 heavy warheads or 15 lighter ones, or a combination of warheads and massive amounts of countermeasures designed to defeat anti-missile systems. It was heralded by the Russian military as a response to the U.S. Prompt Global Strike. +In 2015, information emerged that Russia may be developing a new nuclear torpedo, the Status-6 Ocean Multipurpose System, codenamed "Kanyon" by Pentagon officials. This weapon is designed to create a tsunami wave up to 500m tall that will radioactively contaminate a wide area on an enemy coasts with cobalt-60, and to be immune to anti-missile defense systems such as laser weapons and railguns that might disable an ICBM. Two potential carrier submarines, the Project 09852 Belgorod, and the Project 09851 Khabarovsk, are new boats laid down in 2012 and 2014 respectively. +Status 6 appears to be a deterrent weapon of last resort. It appears to be a torpedo-shaped robotic mini-submarine, that can travel at speeds of 185 km/h (100 kn). More recent information suggests a top speed of 100 km/h (54 kn), with a range of 10,000 km (6,200 mi) and a depth maximum of 1,000 m (3,300 ft). This underwater drone is cloaked by stealth technology to elude acoustic tracking devices. + +During an annual state-of-the-nation address given on March 1, 2018, President Vladimir Putin publicly claimed that Russia was now in possession of several new classes of nuclear weapons, including some with capabilities previously speculated to exist. Putin discussed several new or upgraded weapons, including a hypersonic glide vehicle known as the Avangard, capable of performing sharp maneuvers while traveling at 20 times the speed of sound making it "absolutely invulnerable for any missile defense system." +Putin discussed the existence of a nuclear powered underwater torpedo and a nuclear powered cruise missile (9M730 Burevestnik), both with effectively unlimited range. He discussed that Russia had tested a new class of traditional ICBM called the RS-28 Sarmat, which expanded upon the range and carrying capability of the Soviet-era Satan ICBM. Animations of these weapons were shown in front of the live and televised audience. Putin suggested that an online poll be conducted to give them official public names. + +=== Russian nuclear weapons sharing === + +On 27 February 2022, shortly after the 2022 Russian invasion of Ukraine, Belarusians voted in a constitutional referendum with political and military reforms, including to repeal the post-Soviet constitutional prohibition on basing of nuclear weapons. The reforms also removed the country's neutral status and allowed permanent basing for the Russian Armed Forces. The referendum was criticized by the EU, UK, US, Canada, and other countries in the context of the censorship and human rights violations against the Belarusian opposition. +At a meeting on 25 June 2022, Russian President Vladimir Putin and President of Belarus Alexander Lukashenko agreed the deployment of Russian short-range nuclear-capable missiles. Lukashenko has described the weapons as "non-strategic". Russia supplied Belarus with nuclear-capable Iskander-M missile systems in 2023, with President Putin announcing the first delivery of warheads occurring as of 16 June 2023 in a speech at the St. Petersburg International Forum. These missile warheads are believed to have a variable yield between 5 and 50 kilotons. Additionally, Russia has completed modifications necessary for Belarusian Su-25 bombers to carry nuclear air-dropped bombs and the pilots have received training. The yield of these bombs is not believed to exceed 20 kilotons. Belarus has reported full operation of the nuclear-capable Iskanders and Su-25s, and exercised their use with training nuclear warheads in May 2024. +As of 2025, there is no conclusive open-source evidence that Russian nuclear warheads and gravity bombs themselves are being stored in Belarus, although the most likely location if so is a Cold War-era depot near Asipovichy. On 10 December 2024, Lukashenko stated Belarus was hosting "dozens" of Russian warheads. Putin has also stated that its Oreshnik intermediate-range ballistic missile could be deployed to Belarus in the second half of 2025, and that Belarus would play a role in nuclear targeting. +Despite Lukashenko's statement on weapon usage "without hesitation in case of aggression against Belarus", which could indicate the transfer of operational control to Belarus, Putin emphasized Russian control was maintained, and General Secretary of the CIS Sergey Lebedev described a "double nuclear button" for weapon usage. + +=== Military doctrine === \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-3.md b/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-3.md new file mode 100644 index 000000000..fa4e9aaba --- /dev/null +++ b/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-3.md @@ -0,0 +1,26 @@ +--- +title: "Russia and weapons of mass destruction" +chunk: 4/6 +source: "https://en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:07.180824+00:00" +instance: "kb-cron" +--- + +According to a Russian military doctrine stated in 2010, nuclear weapons could be used by Russia "in response to the use of nuclear and other types of weapons of mass destruction against it or its allies, and also in case of aggression against Russia with the use of conventional weapons when the very existence of the state is threatened". Most military analysts believe that, in this case, Russia would pursue an 'escalate to de-escalate' strategy, initiating limited nuclear exchange to bring adversaries to the negotiating table. Russia will also threaten nuclear conflict to discourage initial escalation of any major conventional conflict. +Leaked documents seen by the Financial Times in 2024 described a threshold for the country's use of tactical nuclear weapons that is lower than Russia had previously disclosed. The document included training scenarios for a possible invasion by China. Alexander Gabuev, director of the Carnegie Russia Eurasia Centre in Berlin told the FT: "This is the first time that we have seen documents like this reported in the public domain [...] They show that the operational threshold for using nuclear weapons is pretty low if the desired result can't be achieved through conventional means." In 2024, Russian officials said that Russia's formal doctrine would be modified to lower the threshold for nuclear use. +Russia has stated that it extends a nuclear umbrella over the Collective Security Treaty Organization member states, while its nuclear policy with Belarus includes additional provision for nuclear first use in response to conventional attacks which threatent Belarus' "very existence". + +==== 2020 deterrence state policy ==== +On June 2, 2020, President Putin signed an Executive Order formally titled "Fundamentals of Russia's Nuclear Deterrence State Policy", in an unprecedented public release of an official document on Russia's nuclear policy. The six-page document identified the range of threats that Russia seeks to deter with its nuclear forces, clarified Russia's general approach to nuclear deterrence, and articulated conditions under which Russia might use nuclear weapons. The policy endorses the use of nuclear weapons in response to a non-nuclear strike due to the improved capabilities of U.S. conventional weapons. + +=== Nuclear proliferation === + +After the Korean War, the Soviet Union transferred nuclear technology and weapons to the People's Republic of China as an adversary of the United States and NATO. According to Ion Mihai Pacepa, "Khrushchev's nuclear-proliferation process started with Communist China in April 1955, when the new ruler in the Kremlin consented to supply Beijing a sample atomic bomb and to help with its mass production. Subsequently, the Soviet Union built all the essentials of China's new military nuclear industry." +Russia is one of the five "Nuclear Weapons States" (NWS) under the Treaty on the Non-Proliferation of Nuclear Weapons (NPT), which Russia ratified (as the Soviet Union) in 1968. +Following the dissolution of the Soviet Union in 1991, a number of Soviet-era nuclear warheads remained on the territories of Belarus, Ukraine, and Kazakhstan. Under the terms of the Lisbon Protocol to the NPT, and following the 1995 Trilateral Agreement between Russia, Belarus, and the US, these were transferred to Russia, leaving Russia as the sole inheritor of the Soviet nuclear arsenal. It is estimated that the Soviet Union had approximately 45,000 nuclear weapons stockpiled at the time of its collapse, according to Viktor Mikhaylov, head of the Federal Agency on Atomic Energy (Russia). +The collapse of the Soviet Union allowed for a warming of relations with NATO. Fears of a nuclear holocaust lessened. In September 1997, the former secretary of the Russian Security Council Alexander Lebed claimed 100 "suitcase sized" nuclear weapons were unaccounted for. He said he was attempting to inventory the weapons when he was fired by President Boris Yeltsin in October 1996. Indeed, several US politicians have expressed worries and promised legislation addressing the threat. + +There were allegations that Russia contributed to the North Korean nuclear program, selling it the equipment for the safe storage and transportation of nuclear materials. Nevertheless, Russia has condemned North Korean nuclear tests since then. The Russian Federation has also wider commercial interests in selling the nuclear technology to India and Iran, reaching understanding memorandums in training their technicians in their respected nuclear programs. Russia is allegedly making efforts to build its influential hold in Africa for earning several billions of pounds by selling nuclear technology to developing African countries. +Russia has reportedly trained its navy to target European sites with nuclear-capable missiles in a potential conflict with NATO, according to leaked documents. The plans reveal a strategy for strikes across Western Europe, emphasizing Russia's reliance on nuclear weapons due to its conventional military limitations. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-4.md b/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-4.md new file mode 100644 index 000000000..a8d613da5 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-4.md @@ -0,0 +1,32 @@ +--- +title: "Russia and weapons of mass destruction" +chunk: 5/6 +source: "https://en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:07.180824+00:00" +instance: "kb-cron" +--- + +=== Nuclear sabotage allegations === +The highest-ranking GRU defector Stanislav Lunev described alleged Soviet plans for using tactical nuclear weapons for sabotage against the United States in the event of war. He described Soviet-made suitcase nukes identified as RA-115s (or RA-115-01s for submersible weapons) which weigh 50–60 pounds (23–27 kg). These portable bombs can last for many years if wired to an electric source. "In case there is a loss of power, there is a battery backup. If the battery runs low, the weapon has a transmitter that sends a coded message – either by satellite or directly to a GRU post at a Russian embassy or consulate." +Lunev was personally looking for hiding places for weapons caches in the Shenandoah Valley area. He said that "it is surprisingly easy to smuggle nuclear weapons into the US" either across the Mexican border or using a small transport missile that can slip though undetected when launched from a Russian airplane. Searches of the areas identified by Lunev – who admits he never planted any weapons in the US – have been conducted, "but law-enforcement officials have never found such weapons caches, with or without portable nuclear weapons" in the US. +In a 2004 interview, colonel general of RVSN Viktor Yesin said that Soviet small-scale nuclear bombs have only been operated by the Army. All such devices have been stored in a weapons depot within Russia, and only left it for checks at the plant which produced them. + +=== Radiological weapons === +The assassination of Alexander Litvinenko by Russian state agents with radioactive polonium was described as the beginning of an era of nuclear terrorism using radiological weapons. + +=== Cultural impact === +Following the expansion of the Russian Orthodox Church following the dissolution of the Soviet Union, an eschatalogical-political concept called Nuclear Orthodoxy gained some prominence. Nuclear Orthodoxy was further elaborated upon by Eurasianist ideologue Yegor Kholmogorov in 2009, where he argued that Russia must secure dominance over the West through military methods and nuclear blackmail. The same year, Patriarch Kirill of Moscow visited the city of Sarov, home to the All-Russian Scientific Research Institute of Experimental Physics and birthplace of Saint Seraphim of Sarov, where he said that Russia's nuclear weapons programme was the will of God. + +== Biological weapons == + +The Soviet Union covertly operated the world's largest, longest, and most sophisticated biological weapons programs. The program began in the 1920s and lasted until at least September 1992 but has possibly been continued by Russia after that. Thereby, the Soviet Union violated its obligations under the Biological Weapons Convention, which it had signed on April 10, 1972, and ratified on March 26, 1975. +In the early 1970s, the Soviet Union significantly enlarged its offensive biological weapons programs. After 1975, the program of biological weapons was run primarily by the "civilian" Biopreparat agency, although it also included numerous facilities run by the Soviet Ministry of Defense, Ministry of Agriculture, Ministry of Chemical Industry, Ministry of Health, and Soviet Academy of Sciences. +According to Ken Alibek, who was deputy-director of Biopreparat, the Soviet biological weapons agency, and who defected to the United States in 1992, weapons were developed in labs in isolated areas of the Soviet Union including mobilization facilities at Omutninsk, Penza and Pokrov and research facilities at Moscow, Stirzhi and Vladimir. These weapons were tested at several facilities most often at "Rebirth Island" (Vozrozhdeniya) in the Aral Sea by firing the weapons into the air above monkeys tied to posts, the monkeys would then be monitored to determine the effects. According to Alibek, although Soviet offensive program was officially ended in 1992, Russia may be still involved in the activities prohibited by BWC. +In 1993, the story about the Sverdlovsk anthrax leak was published in Russia. The incident occurred when spores of anthrax were accidentally released from a military facility in the city of Sverdlovsk (formerly, and now again, Yekaterinburg) 1,500 km (930 mi) east of Moscow on April 2, 1979. The ensuing outbreak of the disease resulted in 94 people becoming infected, 64 of whom died over a period of six weeks. +In 2022 Russian Ministry of Defense started construction of a new massive facility at Sergiev Posad-6 site that hosted bioweapons research in Soviet times. The site belonging to 48th Central Scientific Research Institute (48 ЦНИИ) of the Russian Ministry of Defense, featuring biological security labs was even featured on Russian TV when a delegation from the ministry, then led by Sergei Shoigu visited it. Also in 2022 the 48th Institute has registered a patent for "protective medium for freeze-drying of Yersinia pestis", a common biological weapon pathogen. +As of 2024, the United States Department of State "assesses that the Russian Federation (Russia) maintains an offensive [biological weapons] program and is in violation of its obligation under Articles I and II of the BWC. The issue of compliance by Russia with the BWC has been of concern for many years." + +== Chemical weapons == +Russia signed the Chemical Weapons Convention on January 13, 1993, and ratified it on November 5, 1997. Russia declared an arsenal of 39,967 tons of chemical weapons in 1997 consisting of: \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-5.md b/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-5.md new file mode 100644 index 000000000..dcbecfc0c --- /dev/null +++ b/data/en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction-5.md @@ -0,0 +1,58 @@ +--- +title: "Russia and weapons of mass destruction" +chunk: 6/6 +source: "https://en.wikipedia.org/wiki/Russia_and_weapons_of_mass_destruction" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:19:07.180824+00:00" +instance: "kb-cron" +--- + +blister agents: Lewisite, mustard, Lewisite-mustard-mix (HL) +nerve agents: Sarin, Soman, VX +Ratification was followed by three years of inaction on chemical weapons destruction because of the August 1998 Russian financial crisis. +Russia met its treaty obligations by destroying 1% of its chemical agents by the Chemical Weapons Convention's 2002 deadline, but requested technical and financial assistance and extensions on the deadlines of 2004 and 2007 due to the environmental challenges of chemical disposal. This extension procedure spelled out in the treaty has been utilized by other countries, including the United States. The extended deadline for complete destruction (April 2012) was not met. As of October 2011, Russia had destroyed 57% of its stockpile. Russia also destroyed all of its declared Category 2 (10,616 MTs) and Category 3 chemicals. +Russia has stored its chemical weapons (or the required chemicals) which it declared within the CWC at eight locations. In Gorny (Saratov Oblast) (2.9% of the declared stockpile by mass) and Kambarka (Udmurt Republic) (15.9%) stockpiles have already been destroyed. In Shchuchye (Kurgan Oblast) (13.6%), Maradykovsky (Kirov Oblast) (17.4%) and Leonidovka, Bessonovsky District (Penza Oblast) (17.2%) destruction takes place, while installations are under construction in Pochep (Bryansk Oblast) (18.8%) and Kizner (Udmurt Republic) (14.2%). +In 1947 the 76th warehouse at Leonidovka, Penza District (ru:Леонидовка (железнодорожная станция, Пензенская область)) was reorganized into the 608th Central Aviation Ammunition Base. In 1983, the base was renamed the 50th Arsenal of the Air Force. In February 1998, the unit was reassigned to the Chief of the NBC Protection Troops and received the name 50th Arsenal for Storage of Chemical Weapons of the 1st Category. In 2001, Military Unit 21222 became part of the Federal Directorate for the Safe Storage and Destruction of Chemical Weapons and was named the Leonidovka Chemical Weapons Storage Facility. The depot was storing aviation chemical munitions filled with nerve agents such as sarin, Soman, and VX. The toxic agents stored there amounted to 17.2% of the total stockpiles in the Russian Federation. +The last Russian chemical disposal facility in Kizner, Udmurtia, was opened in December 2013. +On September 27, 2017, OPCW announced that Russia had destroyed its entire declared chemical weapons stockpile, even though they continued using Novichok agents. Ukraine claims Russia used chemical weapons in Mariupol. + +=== Novichok agents === + +A range of Novichok agents were developed and tested in the 1970s and 1980s, but the intended Novichok weapons production site at the Pavlodar Chemical Plant in Soviet Kazakhstan was still under construction when it was decided to demolish the chemical weapons building in 1987 in view of the forthcoming Chemical Weapons Convention. +In March 2018, former GRU agent Sergei Skripal and his daughter were poisoned in Salisbury, United Kingdom by a chemical agent later confirmed to be Novichok. The incident raised new controversy over Russia's potential production and use of chemical weapons, with the United Kingdom accusing the Russian government or rogue Russian agents of orchestrating the attack, a claim Russia repeatedly denied. +In August 2020, Russian opposition figure and anti-corruption activist Alexei Navalny was poisoned in Tomsk, Russia by a chemical agent later confirmed to be Novichok. A joint investigation by Bellingcat, CNN, Der Spiegel, and The Insider with contributions from El País implicates Russia's Federal Security Service (FSB) in the near-fatal nerve-agent poisoning, a fact denied by Russia. Navalny later called what appears to be one of the FSB agents responsible for the cleanup operation who indicates they were tasked to clean Navalny's underpants of Novichok. +Another Russia chemical weapon is Kolokol-1, an aerosolized opioid incapacitating agent thought to be carfentanil. + +=== Use during the invasion of Ukraine === +In the Russian invasion of Ukraine, Russian forces reportedly used chemical weapons 465 times between February 24, 2022, and December 2023, usually as tear gas grenades. In May 2023, a television report on Russia's Channel One showed a Russian battalion commander talking about the effectiveness of chemicals used as weapons. The report also showed a drone dropping a tear gas grenade on a dugout. In December 2023, the Russian 810th Guards Naval Infantry Brigade wrote about its use of drones to drop K-51 grenades containing CS tear gas on Ukrainian positions. The use of tear gas is banned by international Chemical Weapons Convention and considered a chemical weapon if applied by military forces during warfare. The United States accused Russia of also using Chloropicrin as a chemical weapon in Ukraine. On 17 June 2025 Ukrainian Battalion K-2 destroyed a Russian BM-21 "Grad" launcher and then intercepted Russian radio traffic in which the soldiers warned units in their vicinity to protect themselves as the rockets were "loaded with chemistry". + +== See also == +2022 Russian invasion of Ukraine +Defense industry of Russia +Father of All Bombs +List of Russian weaponry makers +Military doctrine of Russia +New physical principles weapons +Nunn–Lugar Cooperative Threat Reduction +Soviet atomic bomb project +Soviet biological weapons program + +== Notes == + +== References == + +== Further reading == +Kostenko, Y., & D’Anieri, P. (2021). Ukraine's Nuclear Disarmament: A History (S. Krasynska, L. Wolanskyj, & O. Jennings, Trans.). Cambridge: Harvard Ukrainian Research Institute. +Ven Bruusgaard, Kristin (2021). "Russian nuclear strategy and conventional inferiority". Journal of Strategic Studies. 44 (1): 3–35. Archived from the original on June 19, 2025. +Kristensen, Hans; Korda, Matt (2024). "Russian nuclear weapons, 2024". Bulletin of the Atomic Scientists. 80 (2): 118–145. Archived from the original on June 19, 2025. + +== External links == +Video archive of the Soviet Union's Nuclear Testing at sonicbomb.com +Abolishing Weapons of Mass Destruction: Addressing Cold War and Other Wartime Legacies in the Twenty-First Century by Mikhail S. Gorbachev +Russian nuclear weapons in 2022, by Federation of American Scientists +Nuclear Threat Initiative on Russia by National Journal +Nuclear stockpile estimate fas.org +Chemical Weapons in Russia: History, Ecology, Politics Archived May 11, 2021, at the Wayback Machine by Lev Fedorov, Moscow, Center of Ecological Policy of Russia, 27 July 1994 +History of the Russian Nuclear Weapons Program Archived June 6, 2021, at the Wayback Machine fas.org +Nuclear pursuits, 2012 \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/S._A._Agulhas-0.md b/data/en.wikipedia.org/wiki/S._A._Agulhas-0.md new file mode 100644 index 000000000..3f8323c8a --- /dev/null +++ b/data/en.wikipedia.org/wiki/S._A._Agulhas-0.md @@ -0,0 +1,60 @@ +--- +title: "S. A. Agulhas" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/S._A._Agulhas" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:41.888355+00:00" +instance: "kb-cron" +--- + +S. A. Agulhas was a South African ice-strengthened training ship and former polar research vessel. She was built by Mitsubishi Heavy Industries in Shimonoseki, Japan, in 1978. S. A. Agulhas was used to service the three South African National Antarctic Programme research bases, Gough Island, Marion Island in the Southern Ocean and SANAE IV in Antarctica, as well as various research voyages. +S. A. Agulhas retired from Antarctic service in April 2012 when the replacement vessel, S. A. Agulhas II, was commissioned. She was transferred to the South African Maritime Safety Authority (SAMSA) as a training ship. +The ship was sold for scrap in 2026. + + +== History == + + +=== Rudder damage === +In December 1991, S. A. Agulhas suffered rudder damage while in the Antarctic, seen as karmic revenge for refusing to take Michael Palin to Antarctica at the end of Pole to Pole with Michael Palin. The German icebreaker Polarstern assisted her and by February 1992 S. A. Agulhas had been freed from the pack ice. Once freed, the SAS Drakensberg towed the stricken vessel back to Cape Town for repairs. + + +=== Rescue of the Magdalena Oldendorff === +S. A. Agulhas participated in a multinational rescue of Magdalena Oldendorff in 2002. +The ice-strengthened cargo ship had become stuck in the ice during severe weather conditions while en route from a Russian Antarctic base to Cape Town. S. A. Agulhas and the Argentine icebreaker Almirante Irízar were dispatched to render assistance. On 27 June 2002, S. A. Agulhas was 370 kilometres (230 mi) from Magdalena Oldendorff, close enough for its two Oryx helicopters, operated by 22 Squadron, to reach the stricken vessel. By 1 June the Oryx had transferred 89 Russian Antarctic expedition members and Magdalena Oldendorff crew members to S. A. Agulhas and have transferred 2,000 kilograms (4,400 lb) of supplies to the remaining crew. The crew remaining on Magdalena Oldendorff were to await the arrival of Almirante Irizar and attempt to free the ship. + + +=== Deaths at sea === + +On 27 September 2007, Ordinary Seaman Edward Hudley was stabbed and killed while S. A. Agulhas was near Gough Island. Two crew members were accused of murder. The environmental protection vessel Sarah Baartman was dispatched and took custody of the two accused and the deceased's body on 3 October 2007. Both accused were charged with murder on arrival in Cape Town, but all charges were dropped on 6 April 2009. +On the ship's first ever voyage to Marion Island, a member of the crew was killed by another crew member, using a fire axe. On arrival back in Cape Town, the suspected killer could not be found on board the vessel. It was speculated that he jumped over the side of the vessel before arrival in Cape Town. + + +== Mission == +The mission of S. A. Agulhas included regular visits to South Africa's base on Antarctica, and to research stations on Gough Island and Marion Island. + + +== Retirement from polar mission and new role == +S. A. Agulhas retired from polar supply missions in March 2012, when its replacement, S. A. Agulhas II, arrived. +The Oceans and Coasts Branch of the +Department of Environmental Affairs announced in 2011 that several other government agencies had requested the vessel's transfer, noting that, unlike the new vessel, the first was not designed to carry out scientific research, just icebreaking and that the capability to perform scientific research had been added later. It was also reported that the vessel could be insured for a further two years. +In July 2012 the S. A. Agulhas was recommissioned as a training ship operated by the South African Maritime Safety Authority, the ship will continue to provide facilities for scientific research while training up to seventy merchant marine cadets. +Having undertaken a brief "shakedown" cruise from 4 July 2012, the ship left Cape Town on 2 November 2012 on the first full cruise as a training vessel. Included in the itinerary were visits to Tema and Abidjan to take on additional cadets from Cameroon, Gambia, Ghana and Côte d'Ivoire, while en route to London, UK. After returning to Cape Town, the ship then visited Antarctica. During the cruise various scientific experiments and observations were completed for the Council for Scientific and Industrial Research and the Departments of Science and Technology and Environmental Affairs. In 2013, the vessel delivered The Coldest Journey team, which was an Antarctica winter crossing expedition led by Sir Ranulph Fiennes in support of the charity "Seeing is Believing". + + +== See also == +S. A. Agulhas II – Icebreaking polar supply and research ship +South African National Antarctic Programme – Government research programme +SANAE – South African National Antarctic Expedition +Gough Island – Island in the South Atlantic +Marion Island – The larger of the Prince Edward Islands + + +== References == + + +== External links == + +South African Maritime Safety Authority - The present owners (Official website). +South African National Antarctic Programme Archived 26 January 2013 at the Wayback Machine - The previous owners (Official website). \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/S._A._Agulhas_II-0.md b/data/en.wikipedia.org/wiki/S._A._Agulhas_II-0.md new file mode 100644 index 000000000..64d53ecac --- /dev/null +++ b/data/en.wikipedia.org/wiki/S._A._Agulhas_II-0.md @@ -0,0 +1,25 @@ +--- +title: "S. A. Agulhas II" +chunk: 1/2 +source: "https://en.wikipedia.org/wiki/S._A._Agulhas_II" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:40.662138+00:00" +instance: "kb-cron" +--- + +S. A. Agulhas II is a South African icebreaking polar supply and research vessel owned by the Department of Forestry, Fisheries and the Environment. She was built in 2012 by STX Finland Rauma shipyard in Rauma, Finland, to replace the ageing S. A. Agulhas, which was retired from Antarctic service in April 2012. Unlike her predecessor, S. A. Agulhas II was designed from the beginning to carry out both scientific research and supply South African research stations in the Antarctic. +During a voyage to the Weddell Sea in February and March 2022, the Agulhas II served as the mother ship for the Endurance22 Expedition of the Falklands Maritime Heritage Trust. Using a submersible vehicle, participants in the expedition located the wreck of Sir Ernest Shackleton's ship, Endurance, at a depth of 11,000 ft (3,400 m) beneath the surface on the floor of Weddell Sea. The Endurance had sunk in 1915 after being crushed by ice. +As of 2025 she is one of several ships that regularly take passengers to and from Tristan da Cunha. The British territory does not have an airport, and so relies on ships. + +== Development and construction == + +In November 2009 the South African Department of Water and Environmental Affairs signed a 116 million euro (R 1.3 billion) contract with STX Finland for the construction of a new polar research and supply vessel that would replace the ageing S. A. Agulhas, which was scheduled to be retired by 2012. The shipyard, located in Rauma, Finland, beat competing bids from Astellero Barreras from Spain, Damen Shipyards from the Netherlands and Keppel Singmarine from Singapore. The production began with the steel-cutting ceremony in September 2010. +The keel of the new ship, referred to by her yard number as NB 1369, was laid down on 31 January 2011. She was launched on 21 July 2011 and named S. A. Agulhas II. S. A. Agulhas II conducted her open water sea trials in February 2012 and, in order to verify the results of model tests, ice trials in the Bay of Bothnia in the Baltic Sea between 19 and 24 March. During the latter voyage the ship encountered level ice up to 0.6 metres (2.0 ft) thick and performed beyond expectations. In addition the hull and machinery of the vessel were instrumented to measure full-scale ice loads, and in the future S. A. Agulhas II will be used as a research platform by companies and universities from Finland and South Africa to gain more knowledge about the interaction between ice and the ship. +S. A. Agulhas II was handed over to the South African Department of Environmental Affairs on 4 April 2012 and left Finland for South Africa the following day. She arrived at her home port, Cape Town on 3 May. During a ceremony celebrating the arrival, the ship was dedicated to the memory of the singer Miriam Makeba. + +== Design == + +=== General characteristics === +The maximum overall length of S. A. Agulhas II is 134.2 metres (440 ft) and her length between perpendiculars is 121.25 metres (397.8 ft). The beam and depth of her hull are 21.7 metres (71 ft) and 10.55 metres (34.6 ft), respectively, and the maximum breadth of the ship is 22 metres (72 ft). The draught of S. A. Agulhas II is 7.65 metres (25.1 ft). Her displacement is 13,687 tons, gross tonnage is 12,897, net tonnage 3,870 and deadweight tonnage 4,780 tons. She is served by a crew of 45. +S. A. Agulhas II is classified by Det Norske Veritas with a class notation 1A1 PC-5 WINTERIZED BASIC Passenger Ship LFL* COMF-V(2)C(2) HELDK-SHF DEICE RP E0 DYNPOS-AUT NAUT-AW CLEAN DESIGN DAT(−35 °C) BIS TMON. Her ice class, Polar Class 5, means that she is designed for year-round operation in medium first-year ice which may include old ice inclusions. Her decks are heated to prevent ice accumulation in temperatures as low as −35 °C (−31 °F). S. A. Agulhas II is the first ship of her kind to be built to the new SOLAS 2009 rules for passenger ships, leading to several unique aspects in her design. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/S._A._Agulhas_II-1.md b/data/en.wikipedia.org/wiki/S._A._Agulhas_II-1.md new file mode 100644 index 000000000..43ee6ded4 --- /dev/null +++ b/data/en.wikipedia.org/wiki/S._A._Agulhas_II-1.md @@ -0,0 +1,34 @@ +--- +title: "S. A. Agulhas II" +chunk: 2/2 +source: "https://en.wikipedia.org/wiki/S._A._Agulhas_II" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:40.662138+00:00" +instance: "kb-cron" +--- + +=== Facilities === +Unlike her predecessor, S. A. Agulhas II was built from the beginning as both a polar supply ship as well as a research vessel. She has both onboard laboratories for scientific research as well as cargo holds and tanks for supplies for South African polar research stations. In addition she has accommodations for 100 passengers in 46 cabins and facilities such as gym, library, sauna, business centre and a 100-seat auditorium. +S. A. Agulhas II has eight permanent and six containerized laboratories for different fields of marine, environmental, biological and climate research totalling 800 square metres (8,600 sq ft). Deep-water probes can be launched either via a large door in the side of the vessel or, if the ship is operating in ice-infested waters, through a 2.4-by-2.4-metre (7.9 by 7.9 ft) moon pool. A drop keel containing transducers for the measurement of plankton density and ocean currents can be lowered 3 metres (9.8 ft) below the bottom of the ship. A hydraulic A-frame in the stern of the ship can be used to tow sampling nets and dredges. +To transport supplies to polar research stations, the ship has a 4,000-cubic-metre (140,000 cu ft) cargo hold located in the bow of the vessel. It is served by a 35-ton main crane and three 10-ton general cargo cranes, all of which can also be used to lower scientific equipment and vehicles on ice. When heavy loads are being lifted, a heeling tank is used to balance the vessel. S. A. Agulhas II is the first ship of her kind to be allowed to carry both passengers and fuel, such as polar diesel, Jet A helicopter fuel and petrol, as cargo. +S. A. Agulhas II has a hangar and helideck capable of serving two Atlas Oryx or Aérospatiale SA 330 Puma helicopters. She also has two fast rescue craft, which are on standby during helicopter operations, and two fully enclosed lifeboats for 75 personnel. +S.A. Agulhas II is fitted with a state-of-the-art Raytheon Anschutz integrated bridge navigation system. The vessel maintains positioning during offloading at the ice shelf, as well as during scientific survey work, using a Navis Engineering DP4000 dynamic positioning system. + +=== Power and propulsion === +S. A. Agulhas II is powered by four six-cylinder Wärtsilä 6L32 medium-speed diesel generating sets, each producing 3,000 kW (4,000 hp). To fulfill the International Maritime Organisation’s Safe Return to Port requirement, the main engines are located in two separate engine rooms and the ship is capable of returning to port with one engine room flooded. Designed according to the power plant principle in which the main generators supply electricity for all shipboard consumers, S. A. Agulhas II has no separate auxiliary generators. In case of emergency, electricity is provided by a Volvo Penta emergency diesel generator. +The ship has a diesel-electric powertrain with two Converteam 4,500 kW propulsion motors driving 4.5-metre (15 ft) KaMeWa controllable pitch propellers, a relatively uncommon feature in diesel-electric ships which usually use fixed-pitch propellers. The propulsion system gives her a maximum speed of 16 knots (30 km/h; 18 mph) in open water, but her service speed is slightly lower, and at 14 knots (26 km/h; 16 mph) her operating range is 15,000 nautical miles (28,000 km; 17,000 mi). Furthermore, S. A. Agulhas II is designed to be able to break level ice with a thickness of 1 metre (3.3 ft) at 5 knots (9.3 km/h; 5.8 mph). For dynamic positioning and manoeuvring in ports she has two Rolls-Royce bow thrusters and one stern thruster. + +== Gallery == + +== See also == + +South African National Antarctic Programme +SANAE +Gough Island +Marion Island + +== References == + +== External links == +South African National Antarctic Programme – owner's official website \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/SANAE-0.md b/data/en.wikipedia.org/wiki/SANAE-0.md new file mode 100644 index 000000000..7995cd61c --- /dev/null +++ b/data/en.wikipedia.org/wiki/SANAE-0.md @@ -0,0 +1,36 @@ +--- +title: "SANAE" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/SANAE" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:43.109836+00:00" +instance: "kb-cron" +--- + +SANAE is the South African National Antarctic Expedition. The name refers both to the overwintering bases (numbered in Roman numerals, e.g. SANAE IV), and the team spending the winter (numbered in Arabic numerals, e.g. SANAE 47). The current base, SANAE IV, is located at Vesleskarvet in Queen Maud Land, Antarctica. Summer teams comprise administrative and maintenance personnel, helicopter crew and scientists from various countries and can be up to 100 people. Overwintering teams consist of scientists and support personnel from South Africa, typically totalling 10 members in recent years. +The research programme at the SANAE IV base is carried out under the auspices of the South African National Antarctic Programme (SANAP). + + +== History == + +The first expedition, SANAE 1, overwintered at Norway Station, taken over by South Africa from Norway after the end of the IGY. Later teams overwintered at SANAE I, SANAE II and SANAE III, built on the Fimbul Ice Shelf near the Blåskimen Island. Built on the moving ice shelf, these stations inevitably got buried, and eventually broke off as part of icebergs drifting away. Successive stations were always repositioned at the same geographical position of 70°19′00″S 2°21′00″W. SANAE IV was built on the nunatak Vesleskarvet in the hope of having a base with a longer lifetime. The first team to overwinter at SANAE IV was SANAE 36 in 1997. The base has been staffed uninterruptedly since then. +Other expeditions also established Borga Base and Sarie Marais Field Base. + + +== See also == +Crime in Antarctica +South African National Antarctic Programme +Gough Island +Marion Island +SA Agulhas +SA Agulhas II +List of Antarctic expeditions + + +== References == + + +== External links == +South African Research Station - Official website +Facebook Group - SANAE team discussions \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/SANAE_IV-0.md b/data/en.wikipedia.org/wiki/SANAE_IV-0.md new file mode 100644 index 000000000..3df68c6cf --- /dev/null +++ b/data/en.wikipedia.org/wiki/SANAE_IV-0.md @@ -0,0 +1,33 @@ +--- +title: "SANAE IV" +chunk: 1/2 +source: "https://en.wikipedia.org/wiki/SANAE_IV" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:44.385865+00:00" +instance: "kb-cron" +--- + +SANAE IV is a current South African Antarctic research base located in Vesleskarvet, Queen Maud Land. The base is part of the South African National Antarctic Programme (SANAP) and is operated by the South African National Antarctic Expedition. +The other two SANAP bases are located on the Gough and Marion islands. + +== Location == +Located in the Queen Maud Land region of Eastern or Greater Antarctica, SANAE IV is on top of a distinctive flat-topped nunatak, Vesleskarvet, on the fringe of the Ahlmann Range of mountains. The base is approximately 80 kilometres (50 mi) from the edge of the continent (also known as the grounding line or hinge zone) and 160 kilometres (99 mi) from the edge of the ice shelf. Vesleskarvet is completely surrounded by the glacial ice sheet. + +== Concept == +The first three SANAE research stations were located on the Fimbul Ice Shelf near the coast, and were subject to the gradual snow burial and eventual crushing that occurs with all stations constructed in this fashion. With a vision of creating a more permanent station, SANAE IV was completed in 1997 using a design which was revolutionary at the time - a structure raised on stilts which allows snow to blow through underneath and thus limits deposition. +By constructing the base near the cliffs of Vesleskarvet, the concept was advanced further: snow that would collect downwind of the base and eventually advance to cover it is instead blown off the 250 m high cliffs into the wind-scoop beyond. By virtue of this feature, the station should far exceed the short useful life of its predecessors, and the raised design has since been applied to newer stations, such as the British Antarctic Survey's new Halley Research Station and Germany's new Neumayer Station III. +The station has an orange coloured roof for better visibility from the air. The underside of the station used to be painted in a blue colour which in theory was warmed somewhat by the sun and contributed to reducing the build-up of ice underneath the station. In 1999 the South African minister of Environment and Tourism decided that this colour scheme is too reminiscent of South Africa's old flag, and ordered the orange roof to be painted bright red. Eventually, the roof remained orange and the blue underside was painted orange as well. + +== Base layout == +SANAE IV consists of three linked modules, each double-story, 44 metres (144 ft) long and 14 metres (46 ft) wide. Two smaller nearby structures contain the satellite dish used for communications and the diesel fuel bunkers. Joined end-on-end in a north–south orientation, the base modules are complemented on the northern end by a large raised helicopter landing area with a lifting section allowing vehicles to be brought up into the hangar for maintenance. +C-block, the northernmost module, contains the large hangar, generator room, workshop, water storage, sewage processing plant, equipment stores, offices of the mechanical and electrical engineers, flight operations office, gymnasium and sauna. The neutron monitors of the North-West University are also housed in this area. +B-block, the middle module, contains the kitchen, dining area, two TV lounges, bar, games room, smoker's room, library, a laundry and accommodation units. +A-block, the southern module, contains the radio room and communications hub, medical facility, darkroom, various research project offices, leader's office, two physics labs, wet lab, store-rooms, another laundry, and accommodation units. +The modules are linked by single-story connections that also serve as entrances with stairways down to the surface 4m below the base. Each link contains an entrance hall with two sets of doors (creating a rudimentary 'air-lock' to prevent excessive cooling when entering and exiting the base) as well as a change-room, ablution facility and electronic distribution boards. + +== Facilities == + +The base generates power using three diesel generators. Water is generated by manually shovelling snow into a snow smelter, which then melts the snow and ice and pumps water automatically into the holding tanks. Waste water and sewerage is treated within the base, with the only by-product being clean water which is then released back into the environment. All refuse is sorted, crushed and sealed in empty fuel drums for return to South Africa. +Although the base is well insulated by its 0.5-metre (1 ft 8 in) thick walls and triple-glazed windows, the internal areas have to be actively warmed. This is accomplished by three means. Firstly, the heat generated by the diesel generators is used to heat water for the taps and showers, which is then circulated through the base. Secondly, the same generator heat is used to heat air which is distributed by the climate control system. Thirdly, small electric wall and fan heaters are available in all indoor areas. Efforts are made to maintain the interior temperature at 18 °C (64 °F), although some areas (such as the hangar) do cool well below this in winter. +SANAE IV has advanced communications capabilities using both satellite and radio systems. A permanent satellite connection to the SANAP headquarters in Cape Town provides three telephone lines and one fax line, and near-broadband internet access. Team members in Antarctica enjoy fast internet access which allows them to correspond with colleagues and stay in contact with friends and family. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/SANAE_IV-1.md b/data/en.wikipedia.org/wiki/SANAE_IV-1.md new file mode 100644 index 000000000..309572b43 --- /dev/null +++ b/data/en.wikipedia.org/wiki/SANAE_IV-1.md @@ -0,0 +1,52 @@ +--- +title: "SANAE IV" +chunk: 2/2 +source: "https://en.wikipedia.org/wiki/SANAE_IV" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:44.385865+00:00" +instance: "kb-cron" +--- + +== Staff == +The base is staffed and maintained year-round by a team of scientists and support personnel. Each overwintering team arrives during the summer expedition and take-over period aboard the research and logistics vessel S. A. Agulhas II, stays at the base through the austral winter and returns to South Africa at the end of the next summer season - an expedition of approximately 16 months. The summer expedition and re-supply team (excluding ship's crew) consists of 80–100 persons, and includes administrative staff, heavy vehicle operators, helicopter crew, maintenance staff, the new overwintering team and a large scientific contingent. During the brief summer (typically December/January to February/March) the base must be resupplied with food, equipment and fuel, all waste products must be removed for transport back to South Africa, the new overwintering team must receive on-site training, and scientific investigations which cannot be undertaken in the winter months (such as extended field-work) must be completed. +The overwintering team remains at the base alone and isolated between the months of March and December. To be fully self-sufficient, the team typically consists of the following personnel: + +An electronic engineer who doubles as communications technician, +A mechanical engineer responsible for the base systems +An electrical engineer who manages power generation and distribution +Two diesel mechanics responsible for maintenance of the diesel generators, heavy vehicles and skidoos +A meteorologist who performs both observations and forecasting +A cosmic ray physicist/engineer responsible for various research projects +A high frequency radar physicist/engineer responsible for the auroral radar projects +A third scientist responsible for the International Polar Year projects and other installations +A medical doctor +An expedition leader is selected from the overwintering team prior to the departure of the expedition, and a deputy elected to serve in his place should the need arise. The expedition leader is responsible for administrative tasks and reports to the South African National Antarctic Programme headquarters in South Africa. + +== Research == + +SANAE IV's reason for existence is to provide a permanent year-round base for scientists undertaking research projects under the auspices of SANAP. Investigations carried-out year-round are predominantly in the physical sciences, while the summer months allow research in more diverse fields such as oceanography, biology, geology and geomorphology. Recent projects have also focused on sources of renewable energy such as solar and particularly wind power generation. There is not currently any formal medical research being undertaken. +Ongoing physical science research programs includes the Antarctic Magnetospheric and Ionospheric Ground-based Observation (AMIGO), Southern Hemisphere Auroral Radar Experiment (SHARE) and Super Dual Auroral Radar Network (SuperDARN), Antarctic Research on Cosmic Rays (ANOKS), very low frequency (VLF) radio research and various International Polar Year projects. +Detailed information about the research projects may be found under the research section of the SANAP webpage + +== 2025 assault incident == +In March 2025, an incident at SANAE IV received attention in South African media following reports of alleged misconduct among members of the overwintering team. A group of nine researchers stationed at the remote Antarctic base, where personnel are typically isolated for extended periods, were involved in a dispute that escalated into a physical altercation. +According to the South African government, the incident involved an assault following a disagreement over a work task that required a schedule change. Reports based on an internal email described "deeply disturbing behaviour", alleging that a team member had physically assaulted a colleague, made death threats, and created an "environment of fear". South Africa's Department of Forestry, Fisheries and the Environment (DFFE) confirmed that an assault had occurred and stated that a response plan was activated shortly after the incident was reported in February 2025. The department initiated mediation and psychological support measures, while the alleged perpretator was reported to have shown remorse, undergone further evaluation, and issued a formal apology to victims. Allegations of sexual harassment were investigated, while officials stated that reports of sexual assault were not substantiated. +Due to SANAE IV's extreme isolation located more than 4,000 km from mainland South Africa and largely inaccessible during the winter months no evacuation was undertaken, although an "emergency medical evacuation to a neighboring German base" was possible if such a circumstance occurred, and sources within the Antarctic research community suggested that South Africa has access to ice-capable ships and aircraft if an evacuation is deemed necessary. The situation continued to be monitored by government officials. Former SANAE IV overwinterer Lodrick Hlungwane described the psychological strain of the environment, stating that "It's a very challenging place. If you isolate yourself, you're bound to lose it", and noted that some individuals struggle to adapt, becoming withdrawn or prone to conflict under prolonged isolation. +The incident also attracted attention from researchers studying human behaviour in extreme environments as they pertain to long-duration space missions, namely future crewed missions to Mars, where similar psychological stressors would be present but with even fewer possibilities for evacuation or external intervention. While noting that violence in Antarctic bases is rare in modern times, psychologists familiar with Antarctic missions stated that the confinement, monotony, disrupted sleep cycles, and limited external stimuli of Antarctic overwintering can amplify interpersonal tensions and impair emotional regulation. This incident was used by psychologists as an example of how existing screening methods may not reliably predict how individuals will respond under prolonged isolation, and more advanced examinations may be necessary for astronauts on similarly isolating missions. + +== See also == +List of Antarctic research stations +List of Antarctic field camps +List of airports in Antarctica +List of Antarctic expeditions +Demographics of Antarctica +Crime in Antarctica + +== References == + +== External links == + +South African National Antarctic Programme - Official website +Facebook Group - SANAE team discussions +Life of an Antarctic Adventurer - SANAE IV Base \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/SETILive-0.md b/data/en.wikipedia.org/wiki/SETILive-0.md index 9fd9a4009..92b4832ea 100644 --- a/data/en.wikipedia.org/wiki/SETILive-0.md +++ b/data/en.wikipedia.org/wiki/SETILive-0.md @@ -4,7 +4,7 @@ chunk: 1/1 source: "https://en.wikipedia.org/wiki/SETILive" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T06:53:05.228360+00:00" +date_saved: "2026-05-05T13:18:03.935172+00:00" instance: "kb-cron" --- diff --git a/data/en.wikipedia.org/wiki/SETIcon-0.md b/data/en.wikipedia.org/wiki/SETIcon-0.md new file mode 100644 index 000000000..5bf51c29c --- /dev/null +++ b/data/en.wikipedia.org/wiki/SETIcon-0.md @@ -0,0 +1,30 @@ +--- +title: "SETIcon" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/SETIcon" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:02.628531+00:00" +instance: "kb-cron" +--- + +SETIcon was a public convention organized by the SETI Institute and held twice in Santa Clara, California. It was an interdisciplinary conference, with talks focusing on a wide range of issues related to the search for extraterrestrial intelligence (SETI). The programs included panels with prominent scientists from NASA and SETI; talks by science fiction writers, artists, and actors; and panels to explore controversial issues and compare perspectives. The sessions were non-technical and meant to increase awareness, interest, and funding for the SETI Institute. The convention attracted professional scientists, educators, space enthusiasts, and science fiction fans. Astronomical tattoos were not uncommon among attendees. +The first SETIcon took place on 13–15 August 2010 and drew about 1,000 people. It commemorated the 25th anniversary of the SETI Institute, the 50th anniversary of SETI, and the 80th birthday of Frank Drake, the radio astronomer who started Project Ozma and pioneered the SETI program. Speakers included scientists Frank Drake, Alex Filippenko, Seth Shostak, Andrew Fraknoi, David Morrison and Jill Tarter; author Robert J. Sawyer; professional skeptic Phil Plait; graphic artist Paul Duffield; actor Tim Russ; and musician Mickey Hart. During one of the panels, Seth Shostak said he expected proof of extraterrestrial life to be found within 25 years. "Young people in the audience, I think there's a really good chance you're going to see this happen." +SETIcon II was held on 22–24 June 2012 and drew about 600 people and 60 speakers, including Bill Nye. Recent findings from NASA's Kepler mission fueled much of the discussion—between 2009 and 2012 the experiment detected about 2,300 new exoplanets, making the discovery of intelligent extraterrestrial life increasingly plausible. Among the returning speakers was Alex Filippenko, who during a panel called "Did the Big Bang Require a Divine Spark?" argued against the necessity of God as the first cause of the Big Bang. He and Seth Shostak said that the laws of physics, specifically quantum fluctuations, can enable the universe to come into being spontaneously. The "divine spark", Filippenko said, is whatever created the laws of physics; since science can't tell us what caused the divine spark, it is best to save a step and leave it at the laws of physics. Shostak added: "So, it could be that this universe is merely the science fair project of a kid in another universe. I don't know how that affects your theological leanings, but it is something to consider." + + +== See also == +Allen Telescope Array – Radio telescope array in California +Astrobiology – Science concerned with life in the universe +Drake Equation – Estimate of extraterrestrial civilizationsPages displaying short descriptions of redirect targets +setiQuest + + +== Notes == + + +== External links == + +Official website +SETI Institute homepage +SETICon YouTube Playlist \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/SEVENDIP-0.md b/data/en.wikipedia.org/wiki/SEVENDIP-0.md new file mode 100644 index 000000000..9195fd404 --- /dev/null +++ b/data/en.wikipedia.org/wiki/SEVENDIP-0.md @@ -0,0 +1,16 @@ +--- +title: "SEVENDIP" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/SEVENDIP" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:06.326475+00:00" +instance: "kb-cron" +--- + +SEVENDIP, which stands for Search for Extraterrestrial Visible Emissions from Nearby Developed Intelligent Populations, was a project developed by the Berkeley SETI Research Center at the University of California, Berkeley that used visible wavelengths to search for extraterrestrial life's intelligent signals from outer space. +Between 1997 and 2007, SEVENDIP employed a 30-inch automated telescope located in Lafayette, California, to scan the sky for potential optical interstellar communications in the nanosecond time-scale laser pulses. Another instrument was mounted on Berkeley's 0.8-meter automated telescope at Leuschner Observatory. Their sensors have a rise time of 0.7 ns and are sensitive to 300 - 700 nm wavelengths. +The target list included mostly nearby F, G, K and M stars, plus a few globular clusters and galaxies. The Leuschner pulse search examined several thousand stars, each for approximately one minute or more. + + +== References == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/SHGb02+14a-0.md b/data/en.wikipedia.org/wiki/SHGb02+14a-0.md new file mode 100644 index 000000000..f4a78ea48 --- /dev/null +++ b/data/en.wikipedia.org/wiki/SHGb02+14a-0.md @@ -0,0 +1,35 @@ +--- +title: "SHGb02+14a" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/SHGb02+14a" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:07.516526+00:00" +instance: "kb-cron" +--- + +SHGb02+14a is an astronomical radio source and a candidate in the Search for Extra-Terrestrial Intelligence (SETI), discovered in March 2003 by SETI@home and announced in New Scientist on September 1, 2004. + + +== Observation == +The source was originally detected by Oliver Voelker of Logpoint in Nuremberg, Germany and Nate Collins of Farin and Associates in Wisconsin, USA using the giant Arecibo Telescope in Puerto Rico. It was observed three times (for a total of about one minute) at a frequency of about 1420 MHz, one of the frequencies in the waterhole region, which is theorized to be a good candidate for frequencies used by extraterrestrial intelligence to broadcast contact signals. +There are a number of puzzling features of this candidate, which have led to a large amount of skepticism. The source is located between the constellations Pisces and Aries, a direction in which no stars are observed within 1000 light years from Earth. It is also a very weak signal. The frequency of the signal has a rapid drift, changing by between 8 and 37 hertz per second. If the cause is Doppler shift, it would indicate emission from a planet rotating nearly 40 times faster on its axis than the Earth. Each time the signal was detected, it was again at about 1420 MHz, the original frequency before any drift. +There are a number of potential explanations for this signal. SETI@home has denied media reports of a likely extraterrestrial intelligence signal. It could be an artifact of random chance, cosmic noise or even a glitch in the technology. + + +=== Star field === +The region is unusually devoid of any nearby stars. The closest star systems in the approximate region of the signal include the binary star G 73-11A and B, which are 106.1 light-years from the Sun, although the unrelated star G 73-10 is only 108.7 light-years away, less than three light-years from G 73-11A and B. All of these stars are red dwarfs much less massive than the Sun. The much nearer star, L 1159-16, which is one of the nearest 40 stars to the Sun, is near the signal's position, but its proximity is likely coincidental. + + +== See also == +BLC1 +Wow! signal + + +== References and notes == + + +== External links == +Signal Candidate SHGb02+14a +SETI@home (classic)'s Best Gaussians +SETI range calculator \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Seth_Shostak-0.md b/data/en.wikipedia.org/wiki/Seth_Shostak-0.md new file mode 100644 index 000000000..dc7ec5dab --- /dev/null +++ b/data/en.wikipedia.org/wiki/Seth_Shostak-0.md @@ -0,0 +1,76 @@ +--- +title: "Seth Shostak" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Seth_Shostak" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:09.907111+00:00" +instance: "kb-cron" +--- + +Seth Shostak (born July 20, 1943) is an American astronomer and author, and is currently the senior astronomer for the SETI Institute. +Shostak co-hosts the weekly radio show/podcast Big Picture Science, has played himself numerous times in TV and internet film dramas, and has acted in several science fiction films. + + +== Early life and education == +Seth Shostak was born in a Jewish family in Arlington County, Virginia, the son of Arthur and Bertha Shostak (née Gortenburg); his father was an electrical engineer. He earned his BS in physics from Princeton University and a PhD in astrophysics from the California Institute of Technology. + + +== Professional work == +Shostak used radio telescopes in the US and the Netherlands, searching for clues to the ultimate fate of the universe by analyzing galaxy motion. In 1999, he produced twelve 30-minute lectures on audio-tape and video titled "The Search for Intelligent Life in Space" for The Teaching Company. An updated overview about the search for extraterrestrial life was presented in 2019. + + +=== SETI Institute === +Since 2001, he has been the senior astronomer at the SETI Institute, a not-for-profit organization whose mission is to "explore, understand and explain the origin, nature and prevalence of life in the universe". SETI Institute, located in Mountain View, California, employs over 50 researchers that study all aspects of the search for life, its origins, the environment in which life develops, and its ultimate fate. +He was the chair of the International Academy of Astronautics SETI Permanent Committee from 2003-2012. + + +== Public outreach == + +Shostak is an active participant in the Institute's observation programs and, along with Molly Bentley, co-hosts the weekly radio show Big Picture Science, which was produced by the SETI Institute from 2002 until January 2025 when it went independent. Each week, Shostak interviews guests about the latest scientific research on a variety of topics: cosmology, physics, genetics, paleontology, evolutionary biology and astrobiology. Big Picture Science is distributed on the Public Radio Satellite System and the Public Radio Exchange and is available for download at the show's website and through podcasts. +Shostak also co-hosts the "Skeptic Check" episodes of Big Picture Science, focused on debunking pseudoscience, UFOs and practices such as astrology and dowsing. +He has published four books, nearly 300 popular articles on astronomy, technology, film and television and gives frequent talks to both young and adult audiences. + + +== Filmography == + + +=== Television / web series === + + +== Recognition == +Shostak was the 2004 winner of the Klumpke-Roberts Award of the Astronomical Society of the Pacific in recognition of his outstanding contributions to the public understanding and appreciation of astronomy. +In January 2010 he was elected as a fellow of the Committee for Skeptical Inquiry (CSI), and in October 2019 was a featured speaker at the organization's annual conference, CSICon. +He has been an observer for Project Phoenix (SETI) as well as an active participant in various international forums for SETI research. He served as chair of the International Academy of Astronautics SETI Permanent Study Group from 2002 to 2012. +Shostak has been nominated by the SETI Institute to be one of the USA Science and Engineering Festival's Nifty Fifty Speakers, who will speak about his work and career to middle and high school students in October 2010. + + +== Personal life == +Seth became interested in electronics and amateur radio as a young student. +Shostak's hobbies include film making, railroading, and computer animation. While working at the University of Groningen in the Netherlands, he founded DIGIMA, a computer animation company. He is a brother of Robert Shostak, developer of the Paradox relational database. +In the spring of 1988 Seth left Groningen to help his brother, who was then working on image database software in Silicon Valley. +According to his C.V., Shostak has a considerable body of creative writing, mostly for corporate clients. He was also "idea man" behind a plan to build a large space and technology theme park in The Netherlands and also the Air and Space Exhibit at the California Science Center, where he also serves on the board. + + +== Bibliography == +Life in the Universe, Jeffrey O. Bennett, Bruce Jakosky and Seth Shostak, 2003, ISBN 0805385770. +Sharing the Universe: Perspectives on Extraterrestrial Life, Seth Shostak, foreword by Frank Drake 1998, ISBN 0-9653774-3-1. +Cosmic Company: The Search for Life in the Universe, Seth Shostak, Alex Barnett, 2003, ISBN 0-521-82233-5. +Confessions of an Alien Hunter: A Scientist's Search for Extraterrestrial Intelligence, Seth Shostak, foreword by Frank Drake 2009, ISBN 1-4262-0392-6. + + +== References == + + +== External links == + +Seth Shostak at IMDb +Seth Shostak biography at the SETI Institute +SETI Institute Homepage +"Big Picture Science" Radio Show +Should We Keep a Low Profile in Space? +"Boldly Going Nowhere" by Seth Shostak, The New York Times (April 13, 2009) +Shostak interview (40:47) - RadioLIVE New Zealand (May 10, 2010) +Shostak lecture (89:58): "The Search for Intelligent Life Among the Stars: New Strategies" (January 10, 2010) on YouTube +Shostak testimony - U.S.Congress: "Using Radio in the Search for Extraterrestrial Intelligence" (May 21, 2014) Archived May 22, 2014, at the Wayback Machine +Shostak, Seth (15 January 2016). "Could This Be Humanity's Last Century?". SETI Institute. Archived from the original on 7 September 2019. Retrieved 21 January 2016. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/SetiQuest-0.md b/data/en.wikipedia.org/wiki/SetiQuest-0.md new file mode 100644 index 000000000..364afcec4 --- /dev/null +++ b/data/en.wikipedia.org/wiki/SetiQuest-0.md @@ -0,0 +1,46 @@ +--- +title: "SetiQuest" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/SetiQuest" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:05.112084+00:00" +instance: "kb-cron" +--- + +setiQuest is an inactive project of the SETI Institute, whose declared aim is to "globalize the search for extra-terrestrial intelligence and empower a new generation of SETI enthusiasts", by creating means for a deeper involvement from the interested public. The project focuses on amplifying the human potential of SETI enthusiasts, and consists of four main fronts: Software, DSP Algorithms, Citizen Scientists, and Data release. Although there is no present activity on setiQuest per-se, much of the code and raw data products are still available on its successor site. + + +== Jill Tarter's TED wish == +The setiQuest project started with Jill Tarter's "TED wish". Tarter was one of three recipients of the 2009 TED prize, which targets outstanding individuals and tries to grant them "one wish to change the world". Tarter's wish was: + +I wish that you would empower Earthlings everywhere to become active participants in the ultimate search for cosmic company. +After the award, the project materialized through a website, that later garnered grass-roots public involvement on its discussion forum, and also in IRC meetings, various social networks, and a wiki. Some of these channels were set up by the community itself, and others were facilitated through the support of several institutions, in cooperation with the SETI Institute. + + +== Software == +The software aspect of the project initially entailed opening the source code of SonATA, the software used on the Allen Telescope Array (ATA), into Open SonATA, to allow improvement by hobbyist programmers who are passionate about the subject or enjoy contributing to open source code development projects. To further this goal, setiQuest was accepted as part of the Google Summer of Code 2011 program. + + +== DSP Algorithms == +The Algorithms subproject provides a channel for the creation of improved Digital signal processing (DSP) algorithms for detection of signals in the background noise captured by the ATA. The algorithms used on the ATA currently only search for continuous wave signals (that is, signals that appear at one frequency as a single tone) or pulsed signals. The goal of this participation mode was to allow signal processing enthusiasts to expand the search to other waveforms, perform improvements in the current algorithms or propose innovative new ones. + + +== Citizen Scientists == +setiQuest also targets those who are less technically inclined, through the development of game-like apps to engage participants as Citizen Scientists, examining real data from SETI observations with the Allen Telescope Array. These apps were meant to harness the ability of the human brain to instinctively detect patterns, even in non-trivial cases where automated tools currently fail. One such app, called "setiQuest Explorer", was released in March 2011. + +Do you wear headphones and listen to music while you work to sharpen your concentration? Could you imagine listening to data instead and responding to anomalies? + + +== Data release == +To encourage developers to create new apps, the SETI Institute has made a large amount of its data available to the public, under a Creative Commons 3.0 license. This data, a subset of the approximately 100 terabytes collected every day, can be downloaded through the setiQuest website. + + +== See also == +SETIcon + + +== Notes == + + +== References == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/South_African_National_Antarctic_Programme-0.md b/data/en.wikipedia.org/wiki/South_African_National_Antarctic_Programme-0.md new file mode 100644 index 000000000..737006a81 --- /dev/null +++ b/data/en.wikipedia.org/wiki/South_African_National_Antarctic_Programme-0.md @@ -0,0 +1,39 @@ +--- +title: "South African National Antarctic Programme" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/South_African_National_Antarctic_Programme" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:36.989604+00:00" +instance: "kb-cron" +--- + +The South African National Antarctic Programme (or SANAP) is the South African government's programme for research in the Antarctic and Subantarctic. Three research stations fall under this programme: the Antarctica research station SANAE IV, and one station each on the subantarctic islands Gough Island and Marion Island. These stations are managed and administered by the Directorate: Antarctic and Islands of the Department of Environmental Affairs. Borga Base was also operated by SANAP from 1969 to 1976. +The mission of the South African National Antarctic Programme is to increase understanding of the natural environment and life in the Antarctic and Southern Ocean through appropriate science and technology. +South Africa is one of the original signatory states of the Antarctic Treaty. + + +== Experiments == +In April 2017, SANAP launched an experiment on Marion Island called Probing Radio Intensity at high-Z from Marion (PRIZM), searching for signatures of the hydrogen line in the early universe. There are other global experiments looking for the same signal, but PRIZM is set apart by its location on Marion Island, which, at 2000 km from the nearest permanent inhabitants, is one of the most remote locations on Earth, allowing access to the full frequency range of the global signal without radio-frequency interference. + + +== Notable people associated with the program == +Prof Bettine van Vuuren, zoologist + + +== See also == +S. A. Agulhas – South African ice-strengthened training ship and former polar research vessel +S. A. Agulhas II – Icebreaking polar supply and research ship +Research stations in Antarctica +South African Weather Service – Meteorological agency of South Africa + + +== References == + + +== External links == +Official SANAP website +SANAE +Gough Island +Marion Island +Wiki site for Southern Ocean Islands and Antarctica \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Stephen_Webb_(scientist)-0.md b/data/en.wikipedia.org/wiki/Stephen_Webb_(scientist)-0.md new file mode 100644 index 000000000..172736185 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Stephen_Webb_(scientist)-0.md @@ -0,0 +1,40 @@ +--- +title: "Stephen Webb (scientist)" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Stephen_Webb_(scientist)" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:20.912432+00:00" +instance: "kb-cron" +--- + +Stephen Webb (born February 25, 1963) is a physicist and author of numerous popular science and math books, as well as academic publications. Webb was educated at Bristol University (BSc (Hons) Physics – First Class) and, as a graduate student, attended Manchester University (PhD – Theoretical Particle Physics). Webb is currently on the academic staff at the University of Portsmouth, and is a presenter of numerous science-related non-academic talks and academic lectures. In 2018, Webb was a featured science speaker at the annual TED conference. +Webb has worked at the University of Cardiff (Physics Department; 1993–95), University of Sheffield (Math & Statistics; 1995–98), University of Loughborough (Math & Sciences; 1998–99), Northumbria University (Information Sciences; 1999–2000), The Open University (2000–2006) and the University of Portsmouth (2006–current). In addition, Webb has been a Member of the Institute of Physics (M. Inst. P.), Chartered Physicist (C. Phys.), Senior Fellow of the Higher Education Academy (SFHEA), a Member of international editorial board (Springer S&F Series), Member of the UK SETI Research Network, and a Project lead for the UK Advance HE Collaborative Award in Teaching Excellence (CATE 2022). + + +== Publications == + + +=== Authored books === +Webb, Stephen (2023). Around the World in 80 Ways: Exploring Our Planet Through Maps and Data (Hardcover). United Kingdom: Springer. ISBN 978-3031024399. +Webb, Stephen (2018). Clash of Symbols: A ride through the riches of glyphs 1st ed. 2018 Edition. United Kingdom: Springer. ISBN 978-3319713496. +Webb, Stephen (2015). If the Universe Is Teeming with Aliens . . . Where Is Everybody? - Seventy-Five Solutions to the Fermi Paradox and the Problem of Extraterrestrial Life - 2nd Edition. United Kingdom: Springer. ISBN 978-3319132358. +Webb, Stephen (2012). New Eyes on the Universe: Twelve Cosmic Mysteries and the Tools We Need to Solve Them (Springer Praxis Books) 2012th Edition. United Kingdom: Springer. ISBN 978-1461421931. +Webb, Stephen (2004). Out of this World: Colliding Universes, Branes, Strings, and Other Wild Ideas of Modern Physics 2004th Edition. United Kingdom: Copernicus Books. ISBN 978-0387029306. +Webb, Stephen (2002). If the Universe Is Teeming with Aliens . . . Where Is Everybody? - Seventy-Five Solutions to the Fermi Paradox and the Problem of Extraterrestrial Life - 1st Edition. United Kingdom: Copernicus Books. ISBN 978-0387955018. +Webb, Stephen (1999). Measuring the Universe: The Cosmological Distance Ladder (Springer Praxis Books) 1999th Edition. United Kingdom: Springer. ISBN 978-1852331061. + + +=== Edited books === +Webb, Stephen (2021). Instant expert: what is the Fermi paradox? – in: All About Space, vol 113, pp 46–47. +Webb, Stephen (2017). Book review: Learning Analytics Explained – in: Innovations in Education and Teaching International, vol 54(6), pp. 625–6. +Webb, Stephen (2015). The alpha magnetic spectrometer – in: Patrick Moore's Yearbook of Astronomy 2016, edited by Moore, P. and Mason, J., pp237–256). London: Macmillan Press. + + +== References == + + +== External links == +Official website +Stephen Webb (video; 13:09): Where Are All The Aliens? (TED talk – 2018) (transcript) +Stephen Webb (video; 13:18): Where Are All The Aliens? on YouTube (TED Talk – 2018) \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Tabby's_Star-0.md b/data/en.wikipedia.org/wiki/Tabby's_Star-0.md index 2831b37da..ac411bffc 100644 --- a/data/en.wikipedia.org/wiki/Tabby's_Star-0.md +++ b/data/en.wikipedia.org/wiki/Tabby's_Star-0.md @@ -4,7 +4,7 @@ chunk: 1/5 source: "https://en.wikipedia.org/wiki/Tabby's_Star" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T11:01:31.754034+00:00" +date_saved: "2026-05-05T13:18:12.474605+00:00" instance: "kb-cron" --- diff --git a/data/en.wikipedia.org/wiki/Tabby's_Star-1.md b/data/en.wikipedia.org/wiki/Tabby's_Star-1.md index 3d21dbdf6..f1532555f 100644 --- a/data/en.wikipedia.org/wiki/Tabby's_Star-1.md +++ b/data/en.wikipedia.org/wiki/Tabby's_Star-1.md @@ -4,7 +4,7 @@ chunk: 2/5 source: "https://en.wikipedia.org/wiki/Tabby's_Star" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T11:01:31.754034+00:00" +date_saved: "2026-05-05T13:18:12.474605+00:00" instance: "kb-cron" --- diff --git a/data/en.wikipedia.org/wiki/Tabby's_Star-2.md b/data/en.wikipedia.org/wiki/Tabby's_Star-2.md index a7c611aed..2317dd9c5 100644 --- a/data/en.wikipedia.org/wiki/Tabby's_Star-2.md +++ b/data/en.wikipedia.org/wiki/Tabby's_Star-2.md @@ -4,7 +4,7 @@ chunk: 3/5 source: "https://en.wikipedia.org/wiki/Tabby's_Star" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T11:01:31.754034+00:00" +date_saved: "2026-05-05T13:18:12.474605+00:00" instance: "kb-cron" --- diff --git a/data/en.wikipedia.org/wiki/Tabby's_Star-3.md b/data/en.wikipedia.org/wiki/Tabby's_Star-3.md index 2e375da7b..05be5c44e 100644 --- a/data/en.wikipedia.org/wiki/Tabby's_Star-3.md +++ b/data/en.wikipedia.org/wiki/Tabby's_Star-3.md @@ -4,7 +4,7 @@ chunk: 4/5 source: "https://en.wikipedia.org/wiki/Tabby's_Star" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T11:01:31.754034+00:00" +date_saved: "2026-05-05T13:18:12.474605+00:00" instance: "kb-cron" --- diff --git a/data/en.wikipedia.org/wiki/Tabby's_Star-4.md b/data/en.wikipedia.org/wiki/Tabby's_Star-4.md index 7b23b2636..e8f7a77bb 100644 --- a/data/en.wikipedia.org/wiki/Tabby's_Star-4.md +++ b/data/en.wikipedia.org/wiki/Tabby's_Star-4.md @@ -4,7 +4,7 @@ chunk: 5/5 source: "https://en.wikipedia.org/wiki/Tabby's_Star" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T11:01:31.754034+00:00" +date_saved: "2026-05-05T13:18:12.474605+00:00" instance: "kb-cron" --- diff --git a/data/en.wikipedia.org/wiki/Teen_Age_Message-0.md b/data/en.wikipedia.org/wiki/Teen_Age_Message-0.md new file mode 100644 index 000000000..83d429bfc --- /dev/null +++ b/data/en.wikipedia.org/wiki/Teen_Age_Message-0.md @@ -0,0 +1,57 @@ +--- +title: "Teen Age Message" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Teen_Age_Message" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:14.903717+00:00" +instance: "kb-cron" +--- + +The Teen Age Message (TAM) was a series of interstellar radio transmissions sent from the Yevpatoria Planetary Radar to six solar-type stars during August–September 2001. The structure of the TAM was suggested by Alexander Zaitsev, Chief Scientist at Russia's Institute of Radio-engineering and Electronics. The message's content and target stars were selected by a group of teens from four Russian cities, who collaborated in person and via the Internet. Each transmission comprised three sections: a sounding, a live theremin concert, and digital data including images and text. TAM was humanity's fourth Active SETI broadcast and the first musical interstellar radio message. + + +== Overview == +Zaitsev's proposal for a musical message – the "First Theremin Concert for Extraterrestrials" – was submitted to the Arecibo Observatory in July 2000. It was rejected amid concerns over the dangers posed by advertising the presence of humanity to unknown and possibly highly advanced civilizations. After another unsuccessful attempt to garner support, the project was backed by the Yevpatoria RT-70 radio telescope with funding from the Education Department of Moscow. Unlike the previous digital-only messages Arecibo-1974 and Cosmic Call 1, TAM had a three-part structure, each containing different forms of information. Such structure was suggested by Alexander Zaitsev, and was intended to make the message easier to detect and interpret. The three elements of each transmission were: + +A coherent sounding signal with slow Doppler wavelength tuning to imitate transmission from the Sun's center. This signal was transmitted in order to help extraterrestrials detect the TAM and diagnose the radio propagation effect of the interstellar medium. +Analog sound output from a theremin. This electric musical instrument produces a quasi-sinusoidal signal which is easily extracted from background noise. There were seven musical compositions in the "First Theremin Concert for Extraterrestrials". +Binary digital information similar to the Arecibo message, including the logotype of TAM, written greetings in Russian and English, and artistic drawings. This section and the concert program were composed by teens from different parts of Russia. + + +== Theremin concert == + +According to Zaitsev, art must be central to any interstellar message. Physical laws and mathematics are almost certainly already known to extraterrestrial intelligences, but our artwork is unique to us. With this in mind, and in contrast to previous binary digital broadcasts, Zatsev proposed "not a discrete two-tone radio signal but a more native continuous one, in which smooth frequency variations directly transfer one-dimensional emotional information. I am talking about music, which is more universally comprehensible than language, and about theremin, which is an electronic noncontact musical instrument." +Three theremin performers from the Moscow Theremin Center – Lydia Kavina, Yana Aksenova, and Anton Kerchenko – were invited to perform seven songs selected by students. The program included two Russian folk songs and works by Beethoven, Vivaldi, Saint-Saëns, Rakhmaninov, and Gershwin. Kavina submitted recordings of her performance, but Aksenova and Kerchenko performed live – the radar dish had been specially modified to accept input from theremins. Each performance lasted about fifteen minutes. The First Theremin Concert for Extraterrestrials was the world's first musical Active SETI broadcast, and was sent seven years before NASA's Across the Universe message. + +Sonograms (frequency variations) of 40-second pieces of three musical compositions from The First Theremin Concert: (from left to right) the last movement of the 9th Symphony by Beethoven, “The Swan” by Saint-Saens, and “Summertime” by Gershwin. +Single-side band (SSB) modulation was used for up-conversion of the Theremin's analog audio signals to carrier frequency 5010 MHz (6 cm wavelength) for sending toward the target stars. + + +== Targets == +The target stars were: + + +== See also == +Across the Universe (message) +Communication with extraterrestrial intelligence +List of interstellar radio messages +Search for extraterrestrial intelligence +The Morse Message (1962) + + +== References == + + +== Further reading == +"NASA beaming Beatles tune to the stars". NBC News. February 2008. Retrieved 31 August 2012. +Cooper, Keith (3 May 2010). "SETI: Cosmic Call". Astronomy Now. Retrieved 31 August 2012. +Jones, Morris (29 September 2002). "Astronomer Speaks Up For ET". Sydney: Space Daily. Retrieved 31 August 2012. + + +== External links == +Self-Decoding Messages +A Teen-Age Message to the Stars +Sending and Searching for Interstellar Messages +Listen to six Theremin melodies as recorded for the Theremin concert +Audio clip of the Gershwin melody played on theremin \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Vesleskarvet-0.md b/data/en.wikipedia.org/wiki/Vesleskarvet-0.md new file mode 100644 index 000000000..559f87a49 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Vesleskarvet-0.md @@ -0,0 +1,19 @@ +--- +title: "Vesleskarvet" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Vesleskarvet" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:45.560158+00:00" +instance: "kb-cron" +--- + +Vesleskarvet is a nunatak on the west side of Ahlmann Ridge located in Queen Maud Land, Antarctica. Its western side consists of a series of cliffs, approximately 250 m high, while the eastern side slopes more gradually down to the icefields. The accessibility of the relatively level wind-swept snow-free summit made it ideal for the establishment of the permanent South African National Antarctic Programme research base SANAE IV. +It was mapped by Norwegian cartographers from surveys and air photos by the Norwegian-British-Swedish Antarctic Expedition (NBSAE) (1949–52) and air photos by the Norwegian expedition (1958–59) and named Vesleskarvet, meaning "the little barren mountain." + + +== See also == +Knerten Rock, an isolated rock 7 nautical miles (13 km) north of Vesleskarvet Cliff + + +== References == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Voyager_Golden_Record-0.md b/data/en.wikipedia.org/wiki/Voyager_Golden_Record-0.md new file mode 100644 index 000000000..185f1961f --- /dev/null +++ b/data/en.wikipedia.org/wiki/Voyager_Golden_Record-0.md @@ -0,0 +1,21 @@ +--- +title: "Voyager Golden Record" +chunk: 1/4 +source: "https://en.wikipedia.org/wiki/Voyager_Golden_Record" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:17.300252+00:00" +instance: "kb-cron" +--- + +The Voyager Golden Records are two identical phonograph records, with one copy aboard each of the two Voyager spacecraft launched in 1977. The records contain sounds and data to reconstruct raster scan images selected to portray the diversity of life and culture on Earth, and are intended for any intelligent extraterrestrial life form who may find them. The records are a time capsule. +Although neither Voyager spacecraft is heading toward any particular star, Voyager 1 will pass within 1.6 light-years' distance of the star Gliese 445, currently in the constellation Camelopardalis, in about 40,000 years. +Carl Sagan noted that "The spacecraft will be encountered and the record played only if there are advanced space-faring civilizations in interstellar space, but the launching of this 'bottle' into the cosmic 'ocean' says something very hopeful about life on this planet." + +== Background == +The Voyager 1 probe is currently the farthest human-made object from Earth. Both Voyager 1 and Voyager 2 have reached interstellar space, the region between stars where the galactic plasma is present. Like their predecessors Pioneer 10 and 11, which featured a simple plaque (the idea of Eric Burgess and Carl Sagan), both Voyager 1 and Voyager 2 were launched by NASA with a message aboard—a kind of time capsule, intended to communicate to extraterrestrials a story of the world of humans on Earth. +While the Pioneer plaques established the precedent, the idea for including information on humanity onboard the Voyagers was the brainchild of John R. Casani, the project manager. He delegated the task to Sagan, who with colleagues Linda Salzman and Frank Drake realized a metal phonograph record with visual information (encoded into grooves by a company in Boulder, Colorado) would outlast magnetic tapes in the outer space environment. The budget Casani gave Sagan was $1,500 for six weeks of work (though Sagan and his colleagues contributed more money out of pocket); he stipulated the Record had to be as light as the Pioneer plaque. + +This is a present from a small, distant world, a token of our sounds, our science, our images, our music, our thoughts and our feelings. We are attempting to survive our time so we may live into yours. + +== Contents == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Voyager_Golden_Record-1.md b/data/en.wikipedia.org/wiki/Voyager_Golden_Record-1.md new file mode 100644 index 000000000..d5c60a925 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Voyager_Golden_Record-1.md @@ -0,0 +1,24 @@ +--- +title: "Voyager Golden Record" +chunk: 2/4 +source: "https://en.wikipedia.org/wiki/Voyager_Golden_Record" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:17.300252+00:00" +instance: "kb-cron" +--- + +The contents of the record were selected for NASA by a committee chaired by Carl Sagan of Cornell University. The selection of content for the record took almost a year. Sagan and his associates assembled 116 images (one used for calibration) and a variety of natural sounds, such as those made by surf, wind, thunder and animals (including the songs of birds and whales). To this they added audio content to represent humanity: spoken greetings in 55 ancient and modern languages, including a spoken greeting in English by U.N. Secretary-General Kurt Waldheim and a greeting by Sagan's six-year-old son Nick; other human sounds, like footsteps and laughter (Sagan's); the inspirational message Per aspera ad astra in Morse code; and musical selections from different cultures and eras. The record also includes a printed message from U.S. president Jimmy Carter. +The collection of images includes many photographs and diagrams, both in black and white and color. The first images are of scientific interest, showing mathematical and physical quantities, the Solar System and its planets, DNA, and human anatomy and reproduction. Care was taken to include not only pictures of humanity, but also some of animals, insects, plants and landscapes. Images of humanity depict a broad range of cultures. These images show food, architecture, and humans in portraits as well as going about their day-to-day lives. Many pictures are annotated with one or more indications of scales of time, size, or mass. Some images contain indications of chemical composition. All measures used on the pictures are defined in the first few images using physical constants that are the same across the universe. +The musical selection is also varied, featuring works by composers such as J. S. Bach, Mozart, Beethoven and Stravinsky. The disc also includes music by Guan Pinghu, Blind Willie Johnson, Louis Armstrong, Chuck Berry, Kesarbai Kerkar, Valya Balkanska, Kamil Jalilov, and electronic composer Laurie Spiegel. The selection of music for the record was completed by a team composed of Carl Sagan as project director, Linda Salzman, Frank Drake, Ann Druyan as creative director, artist Jon Lomberg, ethnomusicologists Robert E. Brown and Alan Lomax, Timothy Ferris as producer, and Jimmy Iovine as sound engineer. The inclusion of Berry's "Johnny B. Goode" was controversial, with Lomax claiming that rock music was "adolescent", to which Sagan replied, "There are a lot of adolescents on the planet." It also included the sounds of humpbacked whales from the 1970 album by Roger Payne, Songs of the Humpback Whale. +The Golden Record also carries an hour-long recording of the brainwaves of Ann Druyan, compressed into a minute of audio. During the recording of the brainwaves, Druyan thought of many topics, including Earth's history, civilizations and the problems they face, and what it was like to fall in love. +After NASA had received criticism over the nudity on the Pioneer plaque (line drawings of a naked man and woman), the agency chose not to allow Sagan and his colleagues to include a photograph of a nude man and woman on the record. Instead, only a silhouette of the couple was included. However, the record does contain "Diagram of vertebrate evolution", by Jon Lomberg, with drawings of an anatomically correct naked male and naked female, showing external organs. The person waving on the diagram was also changed; on the Pioneer plaque, the man is waving, while on the "Vertebrate evolution" image, the woman is waving. +The pulsar map and hydrogen molecule diagram are shared in common with the Pioneer plaque. +The 116 images (one used for calibration) are encoded in analogue form and composed of 512 vertical lines. The remainder of the record is audio, designed to be played at 16+2⁄3 revolutions per minute. +Jimmy Iovine, who was still early in his career as a music producer, served as sound engineer for the project at the recommendation of John Lennon, who was contacted to contribute but was unable to take part. +Sagan's team wanted to include the Beatles 1969 song "Here Comes the Sun" on the record, but the record company EMI, which held the copyrights, declined. In the 1978 book Murmurs of Earth, the failure to secure permission for the song is cited as one of the legal challenges faced by the team compiling the Voyager Golden Record. In the book, Sagan said that the Beatles favoured the idea, but "[they] did not own the copyright, and the legal status of the piece seemed too murky to risk." When asked about the obstacle presented by EMI with regard to "Here Comes the Sun", despite the artists' wishes, Ann Druyan said in 2015: "Yeah, that was one of those cases of having to see the tragedy of our planet. Here's a chance to send a piece of music into the distant future and distant time, and to give it this kind of immortality, and they're worried about money ... we got this telegram [from EMI] saying that it will be $50,000 per record for two records, and the entire Voyager record cost $18,000 to produce." However, this was denied in 2017 by Ferris; in his recollection, "Here Comes the Sun" was not seriously considered for inclusion. +In July 2015, NASA uploaded the audio contents of the record to the audio streaming service SoundCloud. + +=== Images === + +== Playback == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Voyager_Golden_Record-2.md b/data/en.wikipedia.org/wiki/Voyager_Golden_Record-2.md new file mode 100644 index 000000000..fe4c22000 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Voyager_Golden_Record-2.md @@ -0,0 +1,27 @@ +--- +title: "Voyager Golden Record" +chunk: 3/4 +source: "https://en.wikipedia.org/wiki/Voyager_Golden_Record" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:17.300252+00:00" +instance: "kb-cron" +--- + +In the upper left-hand corner of the record cover is a drawing of the phonograph record and the stylus carried with it. The stylus is in the correct position to play the record from the beginning. Written around it in binary notation is the correct time of one rotation of the record, 3.6 seconds, expressed in time units of 0.70 billionths of a second, the time period associated with the radiation emitted or absorbed by a fundamental transition of the hydrogen atom. The drawing indicates that the record should be played from the outside in. Below this drawing is a side view of the record and stylus, with a binary number giving the time to play one side of the record—about an hour (more precisely, between 53 and 54 minutes). +The information in the upper right-hand portion of the cover is designed to show how pictures are to be constructed from the recorded signals. The top drawing shows the typical signal that occurs at the start of a picture. The picture is made from this signal, which traces the picture as a series of vertical lines, similar to analog television (in which the picture is a series of horizontal lines). Picture lines 1, 2 and 3 are noted in binary numbers, and the duration of one of the "picture lines", about 8 milliseconds, is noted. The drawing immediately below shows how these lines are to be drawn vertically, with staggered "interlace" to give the correct picture rendition. Immediately below this is a drawing of an entire picture raster, showing that there are 512 (29) vertical lines in a complete picture. Immediately below this is a replica of the first picture on the record to permit the recipients to verify that they are decoding the signals correctly. A circle was used in this picture to ensure that the recipients use the correct ratio of horizontal to vertical height in picture reconstruction. Color images were represented by three images in sequence, one each for red, green, and blue components of the image. A color image of the spectrum of the Sun was included for calibration purposes. +The drawing in the lower left-hand corner of the cover is the pulsar map previously sent as part of the plaques on Pioneers 10 and 11. It shows the location of the Solar System with respect to 14 pulsars, whose precise periods are given. The drawing containing two circles in the lower right-hand corner is a drawing of the hydrogen atom in its two lowest states, with a connecting line and digit 1 to indicate that the time interval associated with the transition from one state to the other is to be used as the fundamental time scale, both for the time given on the cover and in the decoded pictures. + +== Manufacturing == + +Blank records were provided by the Pyral S.A. of Créteil, France. CBS Records contracted the JVC Cutting Center in Boulder, Colorado to cut the lacquer masters that were then sent to the James G. Lee record-processing center in Gardena, California to cut and gold-plate eight Voyager records. After the records were plated they were mounted in aluminum containers and delivered to JPL. +The record is a copper disk 12 inches (30 cm) in diameter plated first with nickel and then gold. The record's cover is aluminum and electroplated upon it is an ultra-pure sample of the isotope uranium-238. Uranium-238 has a half-life of 4.468 billion years. It is possible (e.g., via mass spectrometry) that a civilization that encounters the record will be able to use the ratio of remaining uranium to the other elements to determine the age of the record. +The records also had the inscription "To the makers of music – all worlds, all times" hand-etched on its surface. The inscription is located in the dead wax or "run-out groove", an area of the record between the label and playable surface. Since this was not in the original specifications, the record was initially rejected, to be replaced with a blank disc. Sagan later convinced the administrator to include the record as is. + +== Journey == + +Voyager 1 was launched in 1977, passed the orbit of Pluto in 1990, and left the Solar System (in the sense of passing the termination shock) in November 2004. It is now in the Kuiper belt. In about 40,000 years, it and Voyager 2 will each come to within about 1.8 light-years of two separate stars: Voyager 1 will have approached star Gliese 445, located in the constellation Camelopardalis, and Voyager 2 will have approached star Ross 248, located in the constellation of Andromeda. +In May 2005, it was reported that Voyager 1 had entered the heliosheath, the region beyond the termination shock. The termination shock is where the solar wind, a thin stream of electrically charged gas blowing continuously outward from the Sun, is slowed by pressure from gas between the stars. At the termination shock, the solar wind slows abruptly from its average speed of 300–700 km/s (670,000–1,570,000 mph) and becomes denser and hotter. +In March 2012, Voyager 1 was over 17.9 billion kilometers (11.1 billion miles) from the Sun and traveling at a speed of 3.6 AU per year (approximately 61,000 km/h (38,000 mph)), while Voyager 2 was over 14.7 billion kilometers (9.1 billion miles) and moving at about 3.3 AU per year (approximately 56,000 km/h (35,000 mph)). +On September 12, 2013, NASA announced that Voyager 1 had left the heliosheath and entered interstellar space, although it still remains within the Sun's gravitational sphere of influence. +Of the eleven instruments carried on Voyager 1, four were still operational and continued to send back data as of 2023, and it was expected that at least one science instrument would remain operational through 2025 and that engineering data could be transmitted for several more years after that. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Voyager_Golden_Record-3.md b/data/en.wikipedia.org/wiki/Voyager_Golden_Record-3.md new file mode 100644 index 000000000..c11b65aef --- /dev/null +++ b/data/en.wikipedia.org/wiki/Voyager_Golden_Record-3.md @@ -0,0 +1,35 @@ +--- +title: "Voyager Golden Record" +chunk: 4/4 +source: "https://en.wikipedia.org/wiki/Voyager_Golden_Record" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:17.300252+00:00" +instance: "kb-cron" +--- + +== Publications == +Most of the images used on the record (reproduced in black and white), together with information about its compilation, can be found in the 1978 book Murmurs of Earth: The Voyager Interstellar Record by Carl Sagan, F. D. Drake, Ann Druyan, Timothy Ferris, Jon Lomberg, and Linda Salzman. A CD-ROM version was issued by Warner New Media in 1992. Author Ann Druyan, who later married Carl Sagan, wrote about the Voyager Record in the epilogue of Sagan's final book Billions and Billions (1997). +To celebrate the 40th anniversary of the record, Ozma Records launched a Kickstarter project to release the record contents in LP format as part of a box set also containing a hardcover book, turntable slipmat, and art print. The Kickstarter was successfully funded with over $1.4 million raised. Ozma Records then produced another edition of the three-disc LP vinyl record box set that also includes the audio content of the Golden Record, softcover book containing the images encoded on the record, images sent back by Voyager, commentary from Ferris, art print, turntable slipmat, and a collector's box. This edition was released in February 2018 along with a 2xCD-Book edition. In January 2018, Ozma Records' Voyager Golden Record; 40th Anniversary Edition won a Grammy Award for best boxed or limited-edition package. + +== Track listing == + +The track listing is as it appears on the 2017 edition released by Ozma Records. + +Disc one + +Disc two + +== See also == + +Arecibo message – Radio message sent into space in 1974 +Communication with extraterrestrial intelligence (CETI) – Branch of SETI +Pioneer plaque – Plaques on the Pioneer 10 and 11 space probes with pictorial messages about humanity +Time capsule – Historic objects of goods or information +Nebra sky disc – Bronze artefact, c. 1600 BC, found in Nebra, Germany + +== References == + +== External links == + +"The Golden Record". JPL/NASA. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Water_hole_(radio)-0.md b/data/en.wikipedia.org/wiki/Water_hole_(radio)-0.md new file mode 100644 index 000000000..96ad9ff89 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Water_hole_(radio)-0.md @@ -0,0 +1,34 @@ +--- +title: "Water hole (radio)" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Water_hole_(radio)" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T13:18:19.699189+00:00" +instance: "kb-cron" +--- + +The waterhole, or water hole, is an especially quiet band of the electromagnetic spectrum between 1420 and 1662 megahertz, corresponding to wavelengths of 18–21 centimeters. It is a popular observing frequency used by radio telescopes in radio astronomy. +The strongest hydroxyl radical spectral line radiates at 18 centimeters, and atomic hydrogen at 21 centimeters (the hydrogen line). These two molecules, which combine to form water, are widespread in interstellar gas, which means this gas tends to absorb radio noise at these frequencies. Therefore, the spectrum between these frequencies forms a relatively "quiet" channel in the interstellar radio noise background. +Bernard M. Oliver, who coined the term in 1971, theorized that the waterhole would be an obvious band for communication with extraterrestrial intelligence, hence the name, which is a pun: in English, a watering hole is a vernacular reference to a common place to meet and talk. Several programs involved in the search for extraterrestrial intelligence, including SETI@home, search in the waterhole radio frequencies. + + +== See also == +BLC1 +Wow! signal +Radio source SHGb02+14a +Schelling point + + +== References == + + +== External links == +SETI: The Radio Search (page 2) +"What Is the Water Hole" (has a cleaner diagram) +Planetary.org: A Blueprint for SETI Archived 2012-04-19 at the Wayback Machine +How SETI Works Discusses the water hole. +"waterhole" entry in The Encyclopedia of Astrobiology, Astronomy, and Spaceflight' +"The ABCs of SETI: the search for extraterrestrial intelligence" +"SETI: The water hole" from Astronomy Now +"SETI Observations" from SETI Institute \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Wow!_signal-0.md b/data/en.wikipedia.org/wiki/Wow!_signal-0.md index 0e950b0a2..da242aad5 100644 --- a/data/en.wikipedia.org/wiki/Wow!_signal-0.md +++ b/data/en.wikipedia.org/wiki/Wow!_signal-0.md @@ -4,7 +4,7 @@ chunk: 1/3 source: "https://en.wikipedia.org/wiki/Wow!_signal" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T11:01:37.835016+00:00" +date_saved: "2026-05-05T13:18:23.464156+00:00" instance: "kb-cron" --- diff --git a/data/en.wikipedia.org/wiki/Wow!_signal-1.md b/data/en.wikipedia.org/wiki/Wow!_signal-1.md index a1f93839b..36f69261b 100644 --- a/data/en.wikipedia.org/wiki/Wow!_signal-1.md +++ b/data/en.wikipedia.org/wiki/Wow!_signal-1.md @@ -4,7 +4,7 @@ chunk: 2/3 source: "https://en.wikipedia.org/wiki/Wow!_signal" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T11:01:37.835016+00:00" +date_saved: "2026-05-05T13:18:23.464156+00:00" instance: "kb-cron" --- diff --git a/data/en.wikipedia.org/wiki/Wow!_signal-2.md b/data/en.wikipedia.org/wiki/Wow!_signal-2.md index c71edb435..38aceebda 100644 --- a/data/en.wikipedia.org/wiki/Wow!_signal-2.md +++ b/data/en.wikipedia.org/wiki/Wow!_signal-2.md @@ -4,7 +4,7 @@ chunk: 3/3 source: "https://en.wikipedia.org/wiki/Wow!_signal" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T11:01:37.835016+00:00" +date_saved: "2026-05-05T13:18:23.464156+00:00" instance: "kb-cron" --- diff --git a/data/en.wikipedia.org/wiki/Zoo_hypothesis-0.md b/data/en.wikipedia.org/wiki/Zoo_hypothesis-0.md index 62bf72539..8bf13b8ed 100644 --- a/data/en.wikipedia.org/wiki/Zoo_hypothesis-0.md +++ b/data/en.wikipedia.org/wiki/Zoo_hypothesis-0.md @@ -4,7 +4,7 @@ chunk: 1/2 source: "https://en.wikipedia.org/wiki/Zoo_hypothesis" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T11:10:12.657699+00:00" +date_saved: "2026-05-05T13:18:25.894933+00:00" instance: "kb-cron" --- diff --git a/data/en.wikipedia.org/wiki/Zoo_hypothesis-1.md b/data/en.wikipedia.org/wiki/Zoo_hypothesis-1.md index e77bd5a2e..3e6e48227 100644 --- a/data/en.wikipedia.org/wiki/Zoo_hypothesis-1.md +++ b/data/en.wikipedia.org/wiki/Zoo_hypothesis-1.md @@ -4,7 +4,7 @@ chunk: 2/2 source: "https://en.wikipedia.org/wiki/Zoo_hypothesis" category: "reference" tags: "science, encyclopedia" -date_saved: "2026-05-05T11:10:12.657699+00:00" +date_saved: "2026-05-05T13:18:25.894933+00:00" instance: "kb-cron" ---