diff --git a/_index.db b/_index.db index cf5a1d825..d2a1aef2b 100644 Binary files a/_index.db and b/_index.db differ diff --git a/data/en.wikipedia.org/wiki/Giorgio_Piccardi-0.md b/data/en.wikipedia.org/wiki/Giorgio_Piccardi-0.md new file mode 100644 index 000000000..e790a7255 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Giorgio_Piccardi-0.md @@ -0,0 +1,20 @@ +--- +title: "Giorgio Piccardi" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Giorgio_Piccardi" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:28.858398+00:00" +instance: "kb-cron" +--- + +Giorgio Piccardi (13 October 1895 – 22 December 1972) was an Italian physicist and chemist. He had a special interest in non-reproducible results or what he termed as fluctuating phenomena which were considered outside the area of conventional science according to scientific positivism. He considered the effect of weak electromagnetic fields, sunspot activity, and cosmic radiation as possible influences affecting chemical reactions. These effects were sometimes called as Piccardi effects. His ideas on what he called "activated water" were appropriated by Jacques Benveniste and others to suggest a scientific basis for homeopathy and this has led to his original work being considered as fringe science. + + +== Life and work == +Piccardi was born in Florence to Ludovico (d. 1944) and Marianna, née Caldini. He studied from 1913 at the Institute of Higher Studies in Florence (Ateneo Fiorentino Reale Istituto di Studi Superiori Pratici e di Perfezionamento). He studied organic chemistry under Hugo Schiff but his studies were interrupted by World War I; he served in the Alpini. He was interned in Hungary after being taken prisoner in 1917 and escaped by digging a tunnel. He was recaptured and suffered from pleurisy and was transferred back in 1919 from an Austrian prison camp. He received a silver medal for his services but a brother was killed in the war and his mother died in the Spanish flu epidemic of 1918. He returned to studies and graduated in chemistry at the Turin Polytechnic before returning to Florence where he graduated in 1922. He studied under Luigi Rolla. He then worked initially in an honorary position at the University of Florence, and then a salaried position from 1926, assisting Rolla, working there until 1936. He taught mathematics, spectroscopy, chemistry and physical chemistry. He worked on the spectroscopy of rare earths and examination of the solar spectrum. In 1936 he went to the University of Genoa as chair of physical chemistry. He was interested in non-reproducible research results which he thought could be related to magnetic fields or other forces. World War II interrupted his work and he returned to work at Florence University, becoming chair of physical chemistry in 1947. He worked there until his retirement in 1965. +Piccardi was interested in the philosophy of science and interacted with Ludovico Geymonat who was influenced by Moritz Schlick. Piccardi was interested in astrophysics and collaborated with Guglielmo Righini. Piccardi believed that electromagnetic waves could alter the structure of water and conducted experiments on what he called "activated water". He suggested that it altered the reactivity of water to bismuth chloride. He examined the hypothesis that the position of the earth in its orbit might alter certain phenomena affected by solar radiation. His ideas on water were taken up as evidence of a scientific principle to support homeopathy. Piccardi himself was not a proponent of homeopathy. He also worked on a wide range of subjects including a study with a pediatrician to examine the surface tension in human milk. He also examined his non-reproducibility and cosmic effect ideas on seed germination. The validity of his statistical analysis comparing experiments and controls have been questioned. +Piccardi married Nella Forti (1900–1964) from a wealthy Jewish family in 1922. He met her while on a trip in the Dolomite mountains. They had three daughters. Their home in Borgo Pinti was a cultural centre where many famous artists and scholars met. Piccardi was also an amateur artist. The couple separated later and Piccardi lived in Genoa. His brother Giacomo (1901–1975) was the father of Giovanni Piccardi (b. 1929) who became a chemist at the University of Florence. Piccardi died from cancer. In 2002 a "Laboratorio Biometeorologico Giorgio Piccardi" was founded in his honour. + + +== References == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Meg_Patterson-0.md b/data/en.wikipedia.org/wiki/Meg_Patterson-0.md new file mode 100644 index 000000000..5a49c059d --- /dev/null +++ b/data/en.wikipedia.org/wiki/Meg_Patterson-0.md @@ -0,0 +1,44 @@ +--- +title: "Meg Patterson" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Meg_Patterson" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:27.734511+00:00" +instance: "kb-cron" +--- + +Margaret Angus Patterson (9 November 1922 – 25 July 2002) was a Scottish surgeon and medical missionary who developed a method for treating drug addiction she called "neuro-electric therapy" (NET). While the therapy gained public attention through celebrity endorsements, it was met with skepticism by the medical community due to a lack of formal evidence. Some modern clinical trials have found that a device based on her principles is effective for reducing opioid withdrawal symptoms. + + +== Early life and education == +Margaret Angus Ingram was born in Aberdeen, Scotland, in 1922. The daughter of Alexander Ingram, she was the youngest of five children. Patterson started medical school at 21 during World War II, and qualified as a member Fellowship of the Royal Colleges of Surgeons when she was 25, the only woman in the group. + + +== Career == +Patterson went to India as a medical missionary. While in India she met George Patterson in Kalimpong and they married in 1953; the couple were committed Christians. George Patterson had become famous through his involvement with the Dalai Lama, and his reporting on the 1959 Tibetan uprising and the subsequent events in China's annexation of Tibet. For her work establishing and expanding clinics in India she was awarded the MBE in 1961. +In 1964, she moved to Hong Kong with her husband, where she was appointed surgeon-in-charge at Tung Wah Hospital. They remained in Hong Kong until 1973. +In 1972, other doctors in Hong Kong, H.L. Wen and S.Y.C. Cheung, published their work on electroacupuncture for treatment of addiction. Patterson adopted their method, developing a technique called "neuro-electric therapy" (NET), replacing the acupuncture needles with electrodes, making this a form of cranial electrotherapy stimulation. On returning to the UK she and her husband collaborated to popularise the technique, which became popular with rock and pop stars. +The medical and scientific community was skeptical about the technique. Patterson found herself building clinics with minimal funding, much as she had in India. +In 1974, Patterson treated Eric Clapton for heroin addiction. +In 1976, Patterson set up a clinic in Broadhurst Manor, East Sussex, funded by the Robert Stigwood Organisation. Donors misleadingly marketed the clinic as "a cure for heroin addiction", which it was not. In 1981, funding ran out and she moved the clinic to California. +A 1986 article in New Scientist said that the medical establishment viewed Patterson as a quack for trying to remove addiction with tiny electrical currents, and that one clinical trial found it to be ineffective. People magazine said there was "disbelief and even hostility from Britain's medical establishment and from the US medical world". + + +== Death and legacy == +In 1999, Patterson had a major stroke a week after opening a clinic in Tijuana. In 2001, she and her husband returned to Scotland, where she died on 25 July 2002. She was survived by her husband, a daughter, two sons, and five grandchildren. +Following Meg Patterson's death, researchers continued her work, focusing on modern validation of the protocol. Her husband and her son Lorne continued marketing the NET technique. Evidence reviewed within NHS Scotland found no substantial evidence that neuro-electric therapy was helpful in treating opiate addiction. +A trial design to assess the efficacy of NET as a treatment for opioid use disorder was published in Frontiers in Psychiatry in 2022. This research led to the development of a transcutaneous alternating current stimulator (tACS), which received FDA clearance in 2024 for use with patients in opioid withdrawal. +A follow-up study published in 2025 examined post-discharge outcomes among patients who received NET Device™ monotherapy during residential opioid detoxification. The study reported lower rates of opioid and psychostimulant use over a three-month period among participants who received active stimulation for more than 24 hours, compared with control conditions. The authors noted that the findings were based on secondary analyses and recommended further independent replication. + + +== Awards and honours == +MBE, 1961 + + +== See also == +Electrotherapy +Cranial electrotherapy stimulation + + +== References == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Melanie's_Marvelous_Measles-0.md b/data/en.wikipedia.org/wiki/Melanie's_Marvelous_Measles-0.md new file mode 100644 index 000000000..96bcc87b7 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Melanie's_Marvelous_Measles-0.md @@ -0,0 +1,19 @@ +--- +title: "Melanie's Marvelous Measles" +chunk: 1/3 +source: "https://en.wikipedia.org/wiki/Melanie's_Marvelous_Measles" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:21.908583+00:00" +instance: "kb-cron" +--- + +Melanie's Marvelous Measles is a self-published children's book written by Australian author and anti-vaccine activist Stephanie Messenger. Through its story, the book claims, contrary to scientific data, that contracting measles is beneficial to health, and that vaccines are ineffective. +The book was first published in 2012, but came to attention in 2015 following a measles outbreak that began at Disneyland during December of the previous year. Many commentators have criticised the book because of the dangers associated with contracting measles, and because its title is reminiscent of George's Marvellous Medicine, by Roald Dahl, who was a prominent advocate of vaccination in his later years, following the death of his daughter Olivia from measles in 1962. The book has also received attention for the numerous negative, often sarcastic, reviews it has received on Amazon.com. + +== Premise and plot == +The book contends that contracting measles is beneficial for children, with the book's product description describing the disease as "quite benign" and "beneficial to the body". + +Melanie's Marvelous Measles was written to educate children on the benefits of having measles and how you can heal from them naturally and successfully. Often today, we are being bombarded with messages from vested interests to fear all diseases in order for someone to sell some potion or vaccine, when, in fact, history shows that in industrialised countries, these diseases are quite benign and, according to natural health sources, beneficial to the body. +In the story, a girl named Tina, who has never been vaccinated, returns to school after the winter break and discovers that her friend Melanie is at home with measles. Tina's mother encourages Tina to visit Melanie, because catching measles would be a good thing for Tina. Tina tells her mother that the other children are frightened of getting measles, but her mother reassures her by explaining that catching measles is a good thing for most children: "Many wise people believe measles make the body stronger and more mature for the future". She suggests some carrot juice and melon might help Melanie recover. She says that being scared of the disease is "a bit like being scared of the dark". Her mother explains that Tina has not been vaccinated because her older brother got sick after receiving his vaccinations. Melanie's mother explains that Melanie had been vaccinated against measles and it did not work; the doctor said that Melanie's measles were the worst case he had ever seen. Melanie explains to Tina that the spots do not hurt or itch, and shows Tina her spotty tummy. The two girls spend the day playing together and end the day with a hug. A week later Tina is back to school, without measles. Her mother attributes this to her eating the right foods, playing in the fresh air and drinking much water. Jared, a vaccinated boy, ends up being the one that gets measles; Tina's mother blames this on his bad eating habits and "the accompanying image is of an annoyed Jared laying in bed covered in spots with a hamburger, chips (labeled 'MSG-enriched, GM-full'), ... soda, cupcake, chocolate bar on his bedside table". +The book also criticizes childhood vaccines as ineffective, and Messenger states in the book that she has raised three children "vaccine-free and childhood disease-free". \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Melanie's_Marvelous_Measles-1.md b/data/en.wikipedia.org/wiki/Melanie's_Marvelous_Measles-1.md new file mode 100644 index 000000000..4690adc0b --- /dev/null +++ b/data/en.wikipedia.org/wiki/Melanie's_Marvelous_Measles-1.md @@ -0,0 +1,23 @@ +--- +title: "Melanie's Marvelous Measles" +chunk: 2/3 +source: "https://en.wikipedia.org/wiki/Melanie's_Marvelous_Measles" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:21.908583+00:00" +instance: "kb-cron" +--- + +== Reception == +Although the book was first published in 2012, it received considerable attention after the Disneyland measles outbreak began in December 2014, which led to many people looking for the book in order to criticise it. +The book has been criticised because measles is responsible for thousands of deaths every year. +Most reviews have been negative: for example, the president of the Australian Medical Association, Steve Hambleton, said: "Last time I saw a kid with measles with the rash they were carried into the surgery and the child looked like a rag doll. The mother was terrified. It's still fatal. About one in 10,000 children will die because of encephalitis". "Even in 'industrialised countries', measles can cause encephalitis, seizures, blindness, heart and nervous system disorders, and (rarely) death". Dr. David Gorski, a breast cancer surgeon who writes frequently against alternative medicine and the anti-vaccine movement, writes: "I'm sure children with whooping cough who are coughing so hard that they can't catch their breath for hours on end, with haemophilus influenzae type B who develop pneumonia or meningitis, with polio who develop paralysis, or with measles who develop pneumonia or subacute sclerosing panencephalitis will feel happy to 'embrace childhood disease', at least those who don't end up dead, who can't embrace anything other than the grave." William Sears says: "Complications of the disease include pneumonia and encephalitis, swelling of the brain, that can result in deafness or mental retardation. I've seen a case of measles encephalitis and it's not pretty. There's nothing awesome about it at all". +Quite a few of the reviews contain statistics of illnesses in recent years. Sears states that it is very easy to catch measles: "Before the vaccine that eradicated the disease from this country by 2000, 'hundreds of thousands of kids got measles every year'... The CDC claims that, if exposed, 90% of unvaccinated people who come in contact with an infected person will get the disease. 'And for 1 out of every 1,000 children who contract it, the disease is fatal.'" "The World Health Organization says measles is 'one of the leading causes of death among young children even though a safe and cost-effective vaccine is available'. There are about 140,000 deaths a year, mostly in poor countries. In Australia measles deaths are now rare because the disease has been controlled though widespread vaccination. When it does occur, the danger comes from complications such as pneumonia and encephalitis. Dr. Hambleton said while "there were occasional adverse reactions to the vaccination, it was far more dangerous to actually experience the disease." In Pakistan, the World Health Organization reported 64 deaths from measles in 2011 and 306 deaths in 2012. "Many Pakistanis", reported Al Jazeera, "especially in rural areas, view vaccination campaigns with suspicion as a western plot to sterilize Muslims." +David Gorski states that this clearly is an anti-vaccine book aimed at children who are told to "embrace childhood disease", eat healthy, and get plenty of sleep and sunshine. He feels that the anti-vaccine parents are hiding their children in the herd of vaccinated children and that if these parents had experienced polio and smallpox like "our grandparents had", they would not be so eager to refute vaccinations now. He thinks that Messenger's belief that her first child's death (from an unreported cause) was vaccine related, and that her three younger children are healthy because they are not vaccinated, is just confirmation bias, and that statements from Messenger like, "My unvaccinated children are alive and well and my vaccinated child is dead! That's what I know and live with every day" are difficult to combat with numbers, but it is still important to keep trying. +Gorski continues: "The death of a single child, whatever the cause, is a tragedy. If we want to see a lot more of these tragedies, all we have to do is to be complacent and let the vaccination rate fall too far below herd enormity. [sic]" +Messenger has said she was trying to give parents and children more knowledge. "Only people who are not in favour of a free press or free speech would [want it banned]", she said. "Natural health says that measles is a good thing for a reasonably healthy child to have". The Australian Vaccination-Skeptics Network (AVN) stated on their webpage that Messenger was "concerned that the public are being misled by medical professionals. They are trying to say that vaccination is safe and effective and it is neither one of those things". +The AVN praises the book for its "beautiful" illustrations, and "simple, colourful text". It discusses not only the fact that measles is usually benign in healthy, well-nourished children, but the importance of proper nutrition including vitamin A from orange fruits and vegetables". + +=== Roald Dahl book === +Another reason for the criticism is because the book's title resembles that of the book George's Marvellous Medicine, by Roald Dahl, who was a strong proponent of vaccination. Dahl's daughter, Olivia, died from measles in 1962 and he later wrote an account of her death. +One reviewer commented that "I can only assume the author Stephanie Messenger was unaware of the incredibly offensive nature of the title". \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Melanie's_Marvelous_Measles-2.md b/data/en.wikipedia.org/wiki/Melanie's_Marvelous_Measles-2.md new file mode 100644 index 000000000..9b5224c87 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Melanie's_Marvelous_Measles-2.md @@ -0,0 +1,25 @@ +--- +title: "Melanie's Marvelous Measles" +chunk: 3/3 +source: "https://en.wikipedia.org/wiki/Melanie's_Marvelous_Measles" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:21.908583+00:00" +instance: "kb-cron" +--- + +=== Amazon reviews === +The book has received numerous negative reviews on Amazon.com; as of February 2015, the book had over 1,000 one-star ratings on this website. Melanie's Marvelous Measles was written in 2012, but because of measles outbreaks across America in 2015, attention has been refocused on combating the anti-vaccine message. "So, the Internet is doing what the Internet does best: trolling the hell out of Messenger's deeply flawed book through Amazon comments". Amazon has chosen to use a disclaimer on the book description, "noting that it is 'provided by the publisher/author of this title and presents the subjective opinions of the publisher/author, which may not be substantiated'". By January 2013, Yahoo! reported that "of the 83 reviews of the book, 71 Amazon users gave it one star, and posted negative feedback." "The Amazon reader reviews are reassuringly vicious, pointing out that a similar book about 'Peter's Pleasant Polio' probably wouldn't get published". +"Certainly, reviewers of the book on the Amazon website don't agree with Messenger's interpretation of history. Many people have left comments on the website, telling their own stories of spending time in hospitals as a child in an oxygen tent, and of siblings who died from complications arising from measles". +The reviews are mostly either one-star or five-star; in an act of unity, most of the five-starred reviews are parodies of the title, or over-the-top cynical commentaries on the book's anti-vaccination message. News.com.au describes the Amazon comments as people mocking the book. In January 2015, Melanie's Marvelous Measles is continuing to receive harsh reviews on Amazon, "(where the story rates 1.9 stars out of 5), with commenters (sic) calling its message 'ignorant and dangerous'. One pediatric nurse wrote that the book was 'appalling'; another said it was 'new-age propaganda'. One (sarcastic) reviewer even rated the book five stars and wrote 'It made me realize things like Ebola should be embraced'". + +=== Book withdrawn from sale from Australian bookstore === +Although it was originally available in Australia through Messenger's website, the book was promoted in Australian bookstores by a US publisher. Steve Hambleton, President of the Australian Medical Association, stated that publishers "should be ashamed of themselves" and asked that the book be pulled from sale. Bookworld (formerly Borders) CEO James Webber stated that "it was a 'sensitive issue' but their policy was to allow controversial content unless it was actually illegal". "This is one of tens of millions of titles that we list on the site, however [it] is not the type of book that we would ever consider actively promoting in any way", he said. +Eventually, due to pressure from customers, Bookworld decided to pull Melanie's Marvelous Measles. A spokesman told News.com.au: "In this case we listened to our customers and believe they have a fair argument and have removed the titles from both pages". + +== See also == +Vaccine controversies +MMR vaccine controversy +Measles resurgence in the United States + +== References == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Nature_therapy-0.md b/data/en.wikipedia.org/wiki/Nature_therapy-0.md new file mode 100644 index 000000000..4b626dee0 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Nature_therapy-0.md @@ -0,0 +1,42 @@ +--- +title: "Nature therapy" +chunk: 1/2 +source: "https://en.wikipedia.org/wiki/Nature_therapy" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:23.076332+00:00" +instance: "kb-cron" +--- + +Nature therapy, sometimes referred to as ecotherapy, grounding, or earthing, is a practice that describes a broad group of techniques or treatments using nature to improve mental or physical health. Various types of nature therapy include forest therapy, forest bathing, shinrin-yoku, and Sami Lok. Spending time in nature has various physiological benefits such as relaxation and stress reduction. Additionally, it can enhance cardiovascular health and reduce risks of high blood pressure. +Recent studies also emphasized its role in supporting mental well-being by improving attention, emotional balance, and overall mood stability. +These effects are usually linked to the body's natural stress recovery process, in which contact with nature decreases cortisol levels and heart rate. + +== History == +Scientists in the 1950s looked into the reasons humans chose to spend time in nature. There is relatively recent history of the term Shinrin-yoku (森林浴) or 'forest bathing' gaining momentum as a term and concept within American culture; the term 'forest bathing' and Shrinrin-yoku was first popularized in Japan by the former head of the Japanese Ministry of Agriculture, Forestry, and Fisheries, Tomohide Akiyama, in 1982 to encourage more people to visit the forests. +This initiative was created to promote relaxation and reduce stress among Japan's urban population during the time of a rapid industrialization. +Several countries, including Finland and South Korea, later created national programs highlighting preventative and therapeutic health benefits tied to regular time in nature. +Today, nature therapy continues to develop as an interdisciplinary field, connecting insights from public health, environmental science, as well as psychology. + +== Health effects == + +=== Mood === +Nature therapy has a is associated with reducing stress and improving a person's mood. Even a small amount of interaction with nature, such as having a tree outside one's home in urban communities, is linked to human wellbeing and promote mental health. This may be due to aesthetic reasons, encouragement of physical activity, or general feelings of connection to nature, where the increased proximity to nature creates higher feelings of connectivity. +Newer research additionally implies that children are becoming persistent, expanding their stress management, and retaining efficient coping skills every day by participating in nature-based programs. +Studies also show that sounds considered natural, like flowing water, birdsongs etc, have been linked to reduced blood pressure, a calmer heart rate, and a better mood. +Forest therapy has been linked to some physiological benefits as indicated by neuroimaging and the profile of mood states psychological test. + +=== Stress and depression === +Interaction with nature is associated with lower stress and depressive symptoms. Forest therapy might help stress management for all age groups. +A quantitative literature review discovered that forest bathing, outdoor learning, and other forest-based practices are related to decreased stress levels and overall improvement in emotional satisfaction in several different demographic groups. +Social horticulture could help with depression and other mental health problems of PTSD, abuse, lonely elderly people, drug or alcohol addicts, blind people, and other people with special needs. Nature therapy could also improve self-management, self-esteem, social relations and skills, socio-political awareness and employability. Nature therapy could reduce aggression and improve relationship skills. +Sounds of nature alone can be enough to affect relaxation and enhance positive emotions while reducing negative emotions, including depression and anger. Perceiving nature can lower stress levels and aid in recovery for diastolic and systolic blood pressures. +There is also evidence that implies if participation in nature-based activities is practiced consistently, it can lead to better and more persistent psychological benefits in comparison to brief exposure. + +=== Other possible benefits === +Nature therapy could help with general medical recovery, pain reduction, Attention Deficit/Hyperactivity Disorder, dementia, obesity, and vitamin D deficiency. Interactions with nature environments enhance social connections, stewardship, sense of place, and increase environmental participation. Connecting with nature also addresses needs such as intellectual capacity, emotional bonding, creativity, and imagination. Overall, there seems to be benefits to time spent in nature including memory, cognitive flexibility, and attention control. +Research also suggests that childhood experience in nature are crucial for children in their daily lives as it contributes to several developmental outcomes and various domains of their well-being. Essentially, these experiences also foster an intrinsic care for nature. Studies suggest that the mental health benefits of nature may depend on how different cultures understand and value the human relationship with nature, meaning the effects can vary across communities. +Spending time outdoors can also help people feel more connected to their community, especially when activities are done in shared public spaces or group programs. +Nature therapy is also considered accessible and low-cost, since it can be practiced in nearby parks, community gardens, or other public outdoor spaces without requiring specialized equipment. +Nature-based programs can strengthen cooperation and social interaction, as shared outdoor activities often involve communication, teamwork, and mutual trust. +Additionally, social and therapeutic horticulture programs have been found to reduce symptoms of anxiety and depression, implying that regular, guided interaction with plants may support emotional well-being. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Nature_therapy-1.md b/data/en.wikipedia.org/wiki/Nature_therapy-1.md new file mode 100644 index 000000000..ab7f827f6 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Nature_therapy-1.md @@ -0,0 +1,27 @@ +--- +title: "Nature therapy" +chunk: 2/2 +source: "https://en.wikipedia.org/wiki/Nature_therapy" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:23.076332+00:00" +instance: "kb-cron" +--- + +== Criticism == +Recent reviews have noted that results often vary depending on study design and population, which makes it difficult to measure long-term effects of nature-based therapies with consistency. +A 2012 systematic review study showed inconclusive results related to the methodology used in studies. Spending time in forests demonstrated positive health effects, but not enough to generate clinical practice guidelines or demonstrate causality. +Other scholars have noted that the growing popularity of nature-based therapies sometimes leads to overgeneralized claims, where emotional or cultural meanings of nature are emphasized more than scientific evidence. +Additionally, there are concerns from researchers expressing that time spent in nature as a form of regenerative therapy is highly personal and entirely unpredictable. Nature can be harmed in the process of human interaction. +While there is growing interest in using nature for mental health treatment, experts warn that more randomized and controlled studies are needed to confirm these effects scientifically. +Some reviews also highlight that many studies rely on self-reported feelings instead of objective measurements, which can make the results less reliable. +Researchers have also noted that some nature-based studies use very small sample sizes, which limits how confidently the results can be applied to larger populations. + +== Governmental support and professionalization == + +In Finland, researchers recommend spending about five hours a month in nature as a preventative health measure, based on studies suggesting that regular outdoor time can lower risks of depression and other stress-related issues. South Korea's approach is more therapeutic, focusing on structured nature-based programs designed to support firefighters with post-traumatic stress disorder. Canada uses a medical-prescription model, where physicians can formally "prescribe nature" to encourage patients to spend more time outdoors for both physical and mental health reasons. Starting in 2019, general practitioners in the United Kingdom are referring patients to a program called Dose of Nature, which has been funded by the National Health Service, local governments and foundations. It boasts a recovery rate of 64% for its first 1500 patients, compared to a 50% rate for talk therapy as well as a higher reliable improvement rate. +Several national health agencies have also begun funding research to test how structured nature-based programs can support public health, especially for stress related conditions. +Some governments have partnered with environmental organizations to create certified training for nature-therapy practitioners, aiming to standardized skills and ensure safer program delivery. +Government have expanded training programs for teachers and youth workers to integrate nature-based practices into educational and community settings, reflecting growing recognition of their developmental benefits. + +== References == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Neuralgia-inducing_cavitational_osteonecrosis-0.md b/data/en.wikipedia.org/wiki/Neuralgia-inducing_cavitational_osteonecrosis-0.md new file mode 100644 index 000000000..b3ccf94c6 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Neuralgia-inducing_cavitational_osteonecrosis-0.md @@ -0,0 +1,27 @@ +--- +title: "Neuralgia-inducing cavitational osteonecrosis" +chunk: 1/1 +source: "https://en.wikipedia.org/wiki/Neuralgia-inducing_cavitational_osteonecrosis" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:24.223040+00:00" +instance: "kb-cron" +--- + +Neuralgia-inducing cavitational osteonecrosis (NICO) is a diagnosis whereby a putative jawbone cavitation causes chronic facial neuralgia; this is different from osteonecrosis of the jaw. In NICO the pain is said to result from the degenerating nerve ("neuralagia"). The condition is probably rare, if it does exist. +Also called Ratner's bone cavity, a neuralgia-inducing cavitational osteonecrosis was first described in dental literature by G V Black in 1920. Several decades later, oral pathologist Jerry E Bouquot took especial interest in NICO. +The diagnostic criteria for NICO are imprecise, and the research offered to support it is flawed. The diagnosis is popular among holistic dentists who attempt to treat NICO by surgically removing the dead bone they say is causing the pain. +It has been rejected as quackery by some dentists and maxillofacial surgeons. In its position statement, dated 1996, the American Association of Endodontists asserted that although NICO occur and are treatable in toothless areas, NICO occurrence and treatment at endodontically treated teeth is generally implausible, that the diagnosis ought to be a last resort, and that routine extraction of endodontically treated teeth is misguided. + + +== See also == +Atypical trigeminal neuralgia +Health fraud +Trigeminal neuralgia + + +== Footnotes == + + +== Further reading == +Gandhi, Yazad R.; Pal, U. S.; Singh, Nimisha (2012). "Neuralgia-inducing cavitational osteonecrosis in a patient seeking dental implants". National Journal of Maxillofacial Surgery. 3 (1): 84–86. doi:10.4103/0975-5950.102173. PMC 3513818. PMID 23251067. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Orthomolecular_medicine-0.md b/data/en.wikipedia.org/wiki/Orthomolecular_medicine-0.md new file mode 100644 index 000000000..0e72cdb93 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Orthomolecular_medicine-0.md @@ -0,0 +1,30 @@ +--- +title: "Orthomolecular medicine" +chunk: 1/4 +source: "https://en.wikipedia.org/wiki/Orthomolecular_medicine" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:25.347903+00:00" +instance: "kb-cron" +--- + +Orthomolecular medicine is a form of alternative medicine that claims to maintain human health through nutritional supplementation. It is rejected by evidence-based medicine. The concept builds on the idea of an optimal nutritional environment in the body and suggests that diseases reflect deficiencies in this environment. Treatment for disease, according to this view, involves attempts to correct "imbalances or deficiencies based on individual biochemistry" by use of substances such as vitamins, minerals, amino acids, trace elements and fatty acids. The notions behind orthomolecular medicine are not supported by sound medical evidence, and the therapy is not effective for chronic disease prevention; even the validity of calling the orthomolecular approach a form of medicine has been questioned since the 1970s. +The approach is sometimes referred to as megavitamin therapy, because its practice evolved out of, and in some cases still uses, doses of vitamins and minerals many times higher than the recommended dietary intake. Orthomolecular practitioners may also incorporate a variety of other styles of treatment into their approaches, including dietary restriction, megadoses of non-vitamin nutrients and mainstream pharmaceutical drugs. Proponents argue that non-optimal levels of certain substances can cause health issues beyond simple vitamin deficiency and see balancing these substances as an integral part of health. +American chemist Linus Pauling coined the term "orthomolecular" in the 1960s to mean "the right molecules in the right amounts" (ortho- in Greek implies "correct"). Proponents of orthomolecular medicine hold that treatment must be based on each patient's individual biochemistry. +The scientific and medical consensus holds that the broad claims of efficacy advanced by advocates of orthomolecular medicine are not adequately tested as drug therapies. It has been described as a form of food faddism and as quackery. There are specific narrow applications where mainstream research has supported benefits for nutrient supplementation, and where conventional medicine uses vitamin treatments for some diseases. +Some vitamins in large doses have been linked to increased risk of cardiovascular disease, cancer and death. The scientific consensus view is that for normal individuals, a balanced diet contains all necessary vitamins and minerals and that routine supplementation is not necessary outside of specific diagnosed deficiencies. + +== History and development == +In the early 20th century, some doctors hypothesised that vitamins could cure disease, and supplements were prescribed in megadoses by the 1930s. Their effects on health were disappointing, though, and in the 1950s and 1960s, nutrition was de-emphasised in standard medical curricula. The word "orthomolecular" was coined by Linus Pauling in 1967. +Amongst the individuals described posthumously as orthomolecularists are Max Gerson, who developed a diet that he claimed could treat diseases, which the American Medical Association's 1949 Council on Pharmacy and Chemistry found ineffective; and Evan Shute and his brother, who attempted to treat heart disease with vitamin E. Several concepts now cited by orthomolecularists, including individual biochemical variation and inborn errors of metabolism, debuted in scientific papers early in the 20th century. +In 1948, William McCormick theorized that vitamin C deficiency played an important role in many diseases and began to use large doses in patients. In the 1950s, Fred R. Klenner also tried vitamin C megadosage as a therapy for a wide range of illnesses, including polio. Irwin Stone stated that organisms that do not synthesise their own vitamin C due to a loss-of-function mutation have a disease he called "hypoascorbemia". This term is not used by the medical community, and the idea of an organism-wide lack of a biosynthetic pathway as a disease was not endorsed by Stone's contemporaries. +In the 1950s, some individuals believed that vitamin deficiencies caused mental illness. Psychiatrists Humphry Osmond and Abram Hoffer gave people having acute schizophrenic episodes high doses of niacin, while William Kaufman used niacinamide. While niacin has no known efficacy in psychiatric disease, the use of niacin in combination with statins and other medical therapies has become one of several medical treatments for cardiovascular disease. +In the late 1960s, Linus Pauling introduced the expression "orthomolecular" to express the idea of the right molecules in the right amounts. Since the first claims of medical breakthroughs with vitamin C by Pauling and others, findings on the health effects of vitamin C have been controversial and contradictory. Pauling's claims have been criticised as overbroad. +Later research branched out into nutrients besides niacin and vitamin C, including essential fatty acids. + +== Scope == +According to Abram Hoffer, orthomolecular medicine does not purport to treat all diseases, nor is it "a replacement for standard treatment. A proportion of patients will require orthodox treatment, a proportion will do much better on orthomolecular treatment, and the rest will need a skillful blend of both." Nevertheless, advocates have said that the right nutrients at the optimum dose for the individual concerned can prevent, treat, and sometimes cure a wide range of medical conditions. Conditions for which orthomolecular practitioners have claimed some efficacy are: acne, alcoholism, allergies, arthritis, autism, bee stings, bipolar disorder, burns, cancer, the common cold, depression, drug addiction, drug overdose, epilepsy, heart diseases, heavy metal toxicity, acute hepatitis, herpes, hyperactivity, hypertension, hypoglycemia, influenza, learning disabilities, mental and metabolic disorders, migraine, mononucleosis, mushroom poisoning, neuropathy & polyneuritis (including multiple sclerosis), osteoporosis, polio, a hypothesised condition called "pyroluria", radiation sickness, Raynaud's disease, mental retardation, schizophrenia, shock, skin problems, snakebite, spider bite, tetanus toxin and viral pneumonia. + +== Orthomolecular psychiatry == + +Hoffer believed that particular nutrients could cure mental illness. In the 1950s, he attempted to treat schizophrenia with niacin, although proponents of orthomolecular psychiatry say that the ideas behind their approach predate Hoffer. According to Hoffer and others who called themselves "orthomolecular psychiatrists", psychiatric syndromes result from biochemical deficiencies, allergies, toxicities or several hypothetical contributing conditions which they termed pyroluria, histadelia and histapenia. These purported causes were said to be found during an "individual biochemical workup" and treated with megavitamin therapy and dietary changes including fasting. These diagnoses and treatments are not accepted by evidence-based medicine. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Orthomolecular_medicine-1.md b/data/en.wikipedia.org/wiki/Orthomolecular_medicine-1.md new file mode 100644 index 000000000..10b812635 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Orthomolecular_medicine-1.md @@ -0,0 +1,32 @@ +--- +title: "Orthomolecular medicine" +chunk: 2/4 +source: "https://en.wikipedia.org/wiki/Orthomolecular_medicine" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:25.347903+00:00" +instance: "kb-cron" +--- + +== Principles == +According to Abram Hoffer, "primitive" peoples do not consume processed foods and do not have "degenerative" diseases. In contrast, typical "Western" diets are said to be insufficient for long-term health, necessitating the use of megadose supplements of vitamins, dietary minerals, proteins, antioxidants, amino acids, ω-3 fatty acids, ω-6 fatty acids, medium-chain triglycerides, dietary fiber, short and long chain fatty acids, lipotropes, systemic and digestive enzymes, other digestive factors, and prohormones to ward off hypothetical metabolism anomalies at an early stage, before they cause disease. +Orthomolecularists say that they provide prescriptions for optimal amounts of micronutrients after individual diagnoses based on blood tests and personal histories. Lifestyle and diet changes may also be recommended. The battery of tests ordered includes many that are not considered useful by medicine. + +== Prevalence == +Orthomolecular medicine is practiced by few medical practitioners. +A survey released in May, 2004 by the National Center for Complementary and Alternative Medicine focused on who used alternative medicine, what was used, and why it was used in the United States by adults age 18 years and over during 2003. The survey reported uses in the previous twelve months that include orthomolecular related uses: Nonvitamin, nonmineral, natural products 18.9%, Diet-based therapies 3.5%, Megavitamin therapy 2.8%. +Another recent CAM survey reported that 12% of liver disease patients used the antioxidant silymarin, more than 6% used vitamins, and that "in all, 74% of patients reported using CAM in addition to the medications prescribed by their physician, but 26% did not inform their physician of their CAM use." +Even though the health benefits are not established, the use of high doses of vitamins is also common in people who have been diagnosed with cancer. According to Cancer Research UK, cancer patients should always seek professional advice before taking such supplements, and using them as a substitute for conventional treatment "could be harmful to [their] health and greatly reduce the chance of curing or controlling [their] cancer". + +== Medical and scientific reception == + +=== Methodology === +Orthomolecular therapies have been criticized as lacking a sufficient evidence base for clinical use: their scientific foundations are too weak, the studies that have been performed are too few and too open to interpretation, and reported positive findings in observational studies are contradicted by the results of more rigorous clinical trials. Accordingly, "there is no evidence that orthomolecular medicine is effective". Proponents of orthomolecular medicine strongly dispute this statement by citing studies demonstrating the effectiveness of treatments involving vitamins, though this ignores the belief that a normal diet will provide adequate nutrients to avoid deficiencies, and that orthomolecular treatments are not actually related to vitamin deficiency. The lack of scientifically rigorous testing of orthomolecular medicine has led to its practices being classed with other forms of alternative medicine and regarded as unscientific. It has been described as food faddism and quackery, with critics arguing that it is based upon an "exaggerated belief in the effects of nutrition upon health and disease." Orthomolecular practitioners will often use dubious diagnostic methods to define what substances are "correct"; one example is hair analysis, which produces spurious results when used in this fashion. +Proponents of orthomolecular medicine contend that, unlike some other forms of alternative medicine such as homeopathy, their ideas are at least biologically based and do not involve magical thinking, and are capable of generating testable hypotheses. Orthomolecular is not a standard medical term, and clinical use of specific nutrients is considered a form of chemoprevention (to prevent or delay development of disease) or chemotherapy (to treat an existing condition). +Despite a lack of evidence for its efficacy, interest in high dose vitamin C therapy via the intravenous route has not been permanently extinguished, and some research groups continue to investigate whether it has an effect as a possible cancer treatment. + +=== Views on safety and efficacy === +In general, the vitamin megadoses advocated by orthomolecular medicine are unsupported by scientific consensus. Some vitamins such as vitamins ADEK are toxic in high doses, including niacin (B3), cholecalciferol (D) and tocopherol (E). The view of the medical community is that there is no evidence for the efficacy of Orthomolecular medicine as a treatment for cancer, and that high vitamin doses may – on the contrary – increase overall mortality. Nutritional treatments are not generally accepted as being helpful for psychological health. Its claims have been criticized by most medical organizations, including the American Cancer Society, the American Psychiatric Association, the National Institute of Mental Health, the American Academy of Pediatrics, CHAMPUS, and the Canadian Paediatric Society. The American Medical Association describes as "myths" the ideas that adequate nutrition is not readily achievable with normal food, all food grown with pesticide is poisonous, all food additives are poisonous, vitamin and mineral deficiencies are common, that the cause of most disease is poor diet, which can be prevented by nutritional supplements. + +Similarly, the American Cancer Society comments that the current scientific evidence does not "support use of orthomolecular therapy for most of the conditions for which it is promoted." Some supplements have exhibited benefits for specific conditions, while a few have been confirmed to be harmful; the consumption of nutritious foods is the best recognized method to obtain vitamins, minerals, and nutrients crucial for good health. Barrie Cassileth, an adviser on alternative medicine to the National Institutes of Health, stated that "scientific research has found no benefit from orthomolecular therapy for any disease," and medical textbooks also report that there is "no evidence that megavitamin or orthomolecular therapy is effective in treating any disease." +A 1973 task force of the American Psychiatric Association unanimously concluded: \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Orthomolecular_medicine-2.md b/data/en.wikipedia.org/wiki/Orthomolecular_medicine-2.md new file mode 100644 index 000000000..b9fb98c4c --- /dev/null +++ b/data/en.wikipedia.org/wiki/Orthomolecular_medicine-2.md @@ -0,0 +1,21 @@ +--- +title: "Orthomolecular medicine" +chunk: 3/4 +source: "https://en.wikipedia.org/wiki/Orthomolecular_medicine" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:25.347903+00:00" +instance: "kb-cron" +--- + +This review and critique has carefully examined the literature produced by megavitamin proponents and by those who have attempted to replicate their basic and clinical work. It concludes in this regard that the credibility of the megavitamin proponents is low. Their credibility is further diminished by a consistent refusal over the past decade to perform controlled experiments and to report their new results in a scientifically acceptable fashion. Under these circumstances this Task Force considers the massive publicity which they promulgate via radio, the lay press and popular books, using catch phrases which are really misnomers like "megavitamin therapy" and "orthomolecular treatment", to be deplorable. +In response to claims that orthomolecular medicine could cure childhood psychoses and learning disorders, the American Academy of Pediatrics labelled orthomolecular medicine a "cult" in 1976. +Proponents of orthomolecular medicine counter that some vitamins and nutrients are now used in medicine as treatments for specific diseases, such as megadose niacin and fish oil for dyslipidemias, and megavitamin therapies for a group of rare inborn errors of metabolism. A review in the Annals of Internal Medicine concluded that while some therapies might be beneficial, others might be harmful or interfere with effective medical therapy. A recent study of over 161,000 individuals provided, in the words of the authors, "convincing evidence that multivitamin use has little or no influence on the risk of common cancers, cardiovascular disease, or total mortality in postmenopausal women." A recent meta-analysis in JAMA suggested that supplementation with combinations of antioxidant vitamins (beta-carotene, vitamin A, and vitamin E) may increase mortality, although with respect to beta-carotene this conclusion may be due to the known harmful effect in smokers. + +==== Safety ==== +In the United States, pharmaceuticals must be proven safe and effective to the satisfaction of the FDA before they can be marketed, whereas dietary supplements must be proven unsafe before regulatory action can be taken. A number of orthomolecular supplements are available in the US in pharmaceutical versions that are sometimes quite similar in strength and general content, or in other countries are regulated as pharmaceuticals. The US regulations also have provisions to recognize a general level of safety for established nutrients that can forgo new drug safety tests. Proponents of orthomolecular medicine argue that supplements are less likely to cause dangerous side-effects or harm, since they are normally present in the body. Some vitamins are toxic in high doses and nearly all (with the possible exception of Vitamin C) will cause adverse effects given high levels of overdosing for prolonged periods as recommended by orthomolecular practitioners. Forgoing medical care in favor of orthomolecular treatments can lead to adverse health outcomes. +Health professionals see orthomolecular medicine as encouraging individuals to dose themselves with large amounts of vitamins and other nutrients without conventional supervision, which they worry might be damaging to health. Potential risks of inappropriate vitamin and supplement regimes include an increased risk of coronary heart disease, hypertension, thrombophlebitis, peripheral neuropathy, ataxia, neurological effects, liver toxicity, congenital abnormalities, spontaneous abortion, gouty arthritis, jaundice, kidney stones, and diarrhea. In their book Trick or Treatment?, Edzard Ernst and Simon Singh conclude that "The concepts of orthomolecular medicine are not biologically plausible and not supported by the results of rigorous clinical trials. These problems are compounded by the fact that orthomolecular medicine can cause harm and is often very expensive." + +=== Example: vitamin E === +Orthomolecular proponents claim that even large doses of vitamin E pose no risk to health and are useful for the treatment and prevention of a broad list of conditions, including heart and circulatory diseases, diabetes and nephritis. Initial hopes for the usefulness of vitamin E in orthomolecular medicine were based on epidemiological studies suggesting that people who consumed more vitamin E had lower risks of chronic disease, such as coronary heart disease. These observational studies could not distinguish between whether the higher levels of vitamin E improved health themselves, or whether confounding variables (such as other dietary factors or exercise) were responsible. To distinguish between these possibilities, a number of randomized controlled trials were performed and meta-analysis of these controlled clinical trials have not shown any clear benefit from any form of vitamin E supplementation for preventing chronic disease. Further clinical studies show no benefit of vitamin E supplements for cardiovascular disease. The current position of the American National Institutes of Health is that there is no convincing evidence that vitamin E supplements can prevent or treat any disease. +Beyond the lack of apparent benefit, a series of three meta-analyses reported that vitamin E supplementation is associated with an increased risk of death; one of the meta-analyses performed by the Cochrane Collaboration also found significantly increased mortality for the antioxidant vitamins A and beta-carotene. A subsequent meta-analysis found no mortality benefit from vitamin E, but also no increase in mortality either. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Orthomolecular_medicine-3.md b/data/en.wikipedia.org/wiki/Orthomolecular_medicine-3.md new file mode 100644 index 000000000..399b1a70d --- /dev/null +++ b/data/en.wikipedia.org/wiki/Orthomolecular_medicine-3.md @@ -0,0 +1,39 @@ +--- +title: "Orthomolecular medicine" +chunk: 4/4 +source: "https://en.wikipedia.org/wiki/Orthomolecular_medicine" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:25.347903+00:00" +instance: "kb-cron" +--- + +=== Use in AIDS === +Several articles in the alternative-medicine literature have suggested that orthomolecular-related dietary supplementation might be helpful for patients with HIV/AIDS. +A study using 250 mg and 1000 mg doses of vitamin C along with other antioxidants to treat people with AIDS did not find any benefit. +A meta analysis in 2010 (updated in 2017 with different results) found that micronutrient supplementation decreased the risk of death and improved outcomes in pregnant women with HIV in Africa. A 2017 Cochrane review found no strong evidence to suggest that micronutrient supplementation prevents death or is effective at slowing the progression of disease for adults with HIV. It is important for people living with HIV to eat a healthy adequate diet. For people with HIV that have clinically demonstrated deficiencies in micronutrients or for people who are not able to consume the recommended daily quantities of minerals and vitamins, supplementation is still encouraged. Vitamin A in children with HIV appears to be safe and beneficial. Vitamin A deficiency is found in children with HIV infection who may or may not have symptoms of AIDS. Vitamin A supplementation reduces morbidity and mortality in AIDS symptomatic children, but has no effect on asymptomatic children. It does not prevent HIV infection, cannot treat the chronic HIV infection, and will not cure AIDS. + +==== Deaths resulting from illegal vitamin trials in South Africa ==== + +Matthias Rath has been extensively criticized for presenting his vitamin supplements as a treatment for AIDS and for testing them in illegal trials in South Africa. A former associate of Linus Pauling, Rath has promoted vitamins as a treatment for HIV infection, describing treatment with effective antiretroviral drugs as toxic and part of a global conspiracy serving the financial interests of the pharmaceutical industry. In a lawsuit that found against Rath, the South African Medical Association blamed his vitamin products for several deaths. The World Health Organization and two health agencies of the United Nations also described Rath's advertisements as "wrong and misleading" and "an irresponsible attack on ARV (antiretroviral) therapy." The South African Centre for Social Science Research described the trials as "state sponsored pseudo-science". Rath's trials, conducted with the aid of AIDS denialist David Rasnick, were declared unlawful by the Cape High Court; Rath, Rasnick and their foundation were barred from conducting further unauthorised clinical trials and from advertising their products. + +=== Alleged institutional bias === +Advocates of orthomolecular medicine, including Pauling, Hoffer and Ewan Cameron have claimed that their findings are actively suppressed by the medical and pharmaceutical industry. Hoffer wrote "There is no conspiracy led and directed by a single person or by a single organization. There is no Mafia in psychiatry. However, there is a conspiracy led and directed by a large number of professionals and their associations who have a common aim to protect their hard-earned orthodoxy, no matter what the cost to their opponent colleagues or to their patients." +The Journal of Orthomolecular Medicine, founded in 1967 as the Journal of Schizophrenia, is a major publication of orthomolecular medicine. As Abram Hoffer wrote: + +We had to create our own journals because it was impossible to obtain entry into the official journals of psychiatry and medicine. Before 1967 I had not found it difficult to publish reports in these journals, and by then I had about 150 articles and several books in the establishment press. +Other members of the medical community deny the existence of such an institutional prejudice. A review in the Journal of Clinical Oncology denied that physicians collude against unconventional treatments. Claims of conspiracy were limited to the now defunct Linus Pauling Institute of Science and Medicine. In its current iteration, the Linus Pauling Institute derives a significant amount of funding from the National Institutes of Health and other federal sources. + +== See also == + +== Citations == + +== Further reading == +Hoffer Abram; with Pauling Linus (2004). Healing cancer: complementary vitamin & drug treatments. Toronto: Canadian College of Naturopathic Medicine. ISBN 978-1-897025-11-6. OCLC 56682217. +Barrett Stephen (1980). The health robbers: how to protect your money and your life (Second ed.). Philadelphia: G. F. Stickley. pp. 52. ISBN 978-0-89313-023-7. OCLC 6994138. +Cassileth Barrie R (1998). Alternative medicine handbook: the complete reference guide to alternative and complementary therapies. New York: W.W. Norton. ISBN 978-0-393-04566-6. OCLC 36727947. +Bender David A (2003). Nutritional biochemistry of the vitamins (Second ed.). Cambridge; New York: Cambridge University Press. p. 230. ISBN 978-0-521-80388-5. OCLC 50948594. +Gratzer Walter B (2005). Terrors of the table: the curious history of nutrition. Oxford; New York: Oxford University Press. pp. 210. ISBN 978-0-19-280661-1. OCLC 60837725. + +== External links == +Biologically based practices: an overview Archived 2009-01-09 at the Wayback Machine, National Institute of Health National Center for Complementary and Alternative Medicine \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Panspermia-0.md b/data/en.wikipedia.org/wiki/Panspermia-0.md new file mode 100644 index 000000000..5320e33b7 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Panspermia-0.md @@ -0,0 +1,14 @@ +--- +title: "Panspermia" +chunk: 1/5 +source: "https://en.wikipedia.org/wiki/Panspermia" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:26.597459+00:00" +instance: "kb-cron" +--- + +Panspermia (from Ancient Greek πᾶν (pan) 'all' and σπέρμα (sperma) 'seed') is the hypothesis that life exists throughout the universe, distributed by cosmic dust, meteoroids, asteroids, comets, and planetoids, as well as by spacecraft carrying unintended contamination by microorganisms, known as directed panspermia. The theory argues that life did not originate on Earth, but instead evolved somewhere else and seeded life as we know it. +Panspermia comes in many forms, such as radiopanspermia, lithopanspermia, and directed panspermia. Regardless of its form, the theories generally propose that microbes able to survive in outer space (such as certain types of bacteria or plant spores) can become trapped in debris ejected into space after collisions between planets and small Solar System bodies that harbor life. This debris containing the lifeforms is then transported by meteors between bodies in a planetary system, or even across planetary systems within a galaxy. In this way, panspermia studies concentrate not on how life began but on methods that may distribute it within the Universe. This point is often used as a criticism of the theory. +Panspermia is a fringe theory with little support amongst mainstream scientists. Critics argue that it does not answer the question of the origin of life but merely places it on another celestial body. It is further criticized because it cannot be tested experimentally. Historically, disputes over the merit of this theory centered on whether life is ubiquitous or emergent throughout the Universe. The theory maintains support today, with some work being done to develop mathematical treatments of how life might migrate naturally throughout the Universe. Its long history lends itself to extensive speculation and hoaxes that have arisen from meteoritic events. +In contrast, pseudo-panspermia is the well-supported hypothesis that many of the small organic molecules used for life originated in space, and were distributed to planetary surfaces. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Panspermia-1.md b/data/en.wikipedia.org/wiki/Panspermia-1.md new file mode 100644 index 000000000..2d0fcd6ca --- /dev/null +++ b/data/en.wikipedia.org/wiki/Panspermia-1.md @@ -0,0 +1,19 @@ +--- +title: "Panspermia" +chunk: 2/5 +source: "https://en.wikipedia.org/wiki/Panspermia" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:26.597459+00:00" +instance: "kb-cron" +--- + +== History == +Panspermia has a history dating back to the 5th century BCE and the natural philosopher Anaxagoras. Classicists came to agree that Anaxagoras maintained the Universe (or Cosmos) was full of life, and that life on Earth started from the fall of these extra-terrestrial seeds. Panspermia as it is known today, however, is not identical to this original theory. The name, as applied to this theory, was only first coined in 1908 by Svante Arrhenius, a Swedish scientist. Prior to this, since around the 1860s, many prominent scientists were becoming interested in the theory. More recent advocates include Sir Fred Hoyle and Chandra Wickramasinghe. +In the 1860s, there were three scientific developments that began to bring the focus of the scientific community to the problem of the origin of life. Firstly, the Kant-Laplace Nebular theory of solar system and planetary formation was gaining favor, and implied that when the Earth first formed, the surface conditions would have been inhospitable to life as we know it. This meant that life must have arisen on Earth at a later date, without biological precursors. Secondly, Charles Darwin's famous theory of evolution implied some elusive origin, because in order for something to evolve, it must start somewhere. In his Origin of Species, Darwin was unable or unwilling to touch on this issue. Third and finally, Louis Pasteur and John Tyndall experimentally disproved the (now superseded) theory of spontaneous generation, which suggested that life was constantly arising from non-living matter and did not have a common ancestor, as suggested by Darwin's theory of evolution. +Altogether, these three developments in science presented the wider scientific community with a seemingly paradoxical situation regarding the origin of life: life must have arisen from non-biological precursors after the Earth was formed, and yet spontaneous generation as a theory had been experimentally disproved. From here is where the study of the origin of life branched. Those who accepted Pasteur's rejection of spontaneous generation began to develop the theory that under (unknown) conditions on a primitive Earth, life must have arisen from non-living material. This theory became known as abiogenesis, and is the currently accepted one. On the other side of this are those scientists of the time who rejected Pasteur's results and instead supported the idea that life on Earth came from existing life. This necessarily requires that life has always existed somewhere on some planet, and that it has a mechanism of transferring between planets. Thus, the modern treatment of panspermia began in earnest. +Lord Kelvin, in a presentation to The British Association for the Advancement of Science in 1871, proposed the idea that similarly to how seeds can be transferred through the air by winds, so can life be brought to Earth by the infall of a life-bearing meteorite. He further proposed the idea that life can only come from life, and that this principle is invariant under philosophical uniformitarianism, similar to how matter can neither be created nor destroyed. There would have always been planets spreading life throughout the universe because, he said, "we all confidently believe that there are at present, and have been from time immemorial, many worlds of life besides our own." This argument was heavily criticized because of its boldness, and additionally due to technical objections from the wider community. In particular, Johann Zollner from Germany argued against Kelvin by saying that organisms carried in meteorites to Earth would not survive the descent through the atmosphere due to friction heating. +The arguments went back and forth until Svante Arrhenius gave the theory its modern treatment and designation. Arrhenius argued against abiogenesis on the basis that it had no experimental foundation at the time, and believed that life had always existed somewhere in the Universe, arguing that "we may become accustomed to the idea that life is eternal, and hence that it is useless to inquire into its origin." He focused his efforts of developing the mechanism(s) by which this pervasive life may be transferred through the Universe. At this time, it was recently discovered that solar radiation can exert pressure, and thus force, on matter. Arrhenius thus concluded that it is possible that very small organisms such as bacterial spores could be moved around due to this radiation pressure. +At this point, panspermia as a theory now had a potentially viable transport mechanism, as well as a vehicle for carrying life from planet to planet. The theory still faced criticism mostly due to doubts about how long spores would actually survive under the conditions of their transport from one planet, through space, to another. Despite all the emphasis placed on trying to establish the scientific legitimacy of this theory, it still lacked testability; that was and still is a serious problem the theory has yet to overcome. Furthermore, as Dennis Danielson and Christopher M. Graney have pointed out, the theory is essentially based on the idea of an eternal, unchanging universe with no beginning and in which life is eternal, and not an evolving "Big Bang" universe. +Support for the theory persisted, however, with Fred Hoyle (famous for his opposition to the Big Bang Theory and for promoting his theory of an unchanging, "steady-state" universe) and Chandra Wickramasinghe using two reasons for why an extra-terrestrial origin of life might be preferred. First is that required conditions for the origin of life may have been more favorable somewhere other than Earth, and second that life on Earth exhibits properties that are not accounted for by assuming an endogenic origin. Hoyle studied spectra of interstellar dust, and came to the conclusion that space contained large amounts of organics, which he suggested were the building blocks of the more complex chemical structures. Critically, Hoyle argued that this chemical evolution was unlikely to have taken place on a prebiotic Earth, and instead the most likely candidate is a comet. Furthermore, Hoyle and Wickramasinghe concluded that the evolution of life requires a large increase in genetic information and diversity, which might have resulted from the influx of viral material from space via comets. Hoyle reported (in a lecture at Oxford on January 16, 1978) a pattern of coincidence between the arrival of major epidemics and the occasions of close encounters with comets, which lead Hoyle to suggest that the epidemics were a direct result of material raining down from these comets. This claim in particular garnered criticism from biologists. +Since the 1970s, a new era of planetary exploration meant that data could be used to test panspermia and potentially transform it from conjecture to a testable theory. Though it has yet to be tested, panspermia is still explored today in some mathematical treatments, and as its long history suggests, the appeal of the theory has stood the test of time. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Panspermia-2.md b/data/en.wikipedia.org/wiki/Panspermia-2.md new file mode 100644 index 000000000..fe276031b --- /dev/null +++ b/data/en.wikipedia.org/wiki/Panspermia-2.md @@ -0,0 +1,41 @@ +--- +title: "Panspermia" +chunk: 3/5 +source: "https://en.wikipedia.org/wiki/Panspermia" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:26.597459+00:00" +instance: "kb-cron" +--- + +== Overview == + +=== Core requirements === +Panspermia requires: + +that organic molecules originated in space (perhaps to be distributed to Earth), +that life originated from these molecules, extraterrestrially, +that this extraterrestrial life was transported to Earth. +The creation and distribution of organic molecules from space is now uncontroversial; it is known as pseudo-panspermia. The jump from organic materials to life originating from space, however, is hypothetical and currently untestable. + +=== Transport vessels === +Bacterial spores and plant seeds are two common proposed vessels for panspermia. According to the theory, they could be encased in a meteorite and transported to another planet from their origin, subsequently descend through the atmosphere and populate the surface with life (see lithopanspermia below). This naturally requires that these spores and seeds have formed somewhere else, maybe even in space in the case of how panspermia deals with bacteria. Understanding of planetary formation theory and meteorites has led to the idea that some rocky bodies originating from undifferentiated parent bodies could be able to generate local conditions conducive to life. Hypothetically, internal heating from radiogenic isotopes could melt ice to provide water as well as energy. In fact, some meteorites have been found to show signs of aqueous alteration which may indicate that this process has taken place. Given that there are such large numbers of these bodies found within the Solar System, an argument can be made that they each provide a potential site for life to develop. A collision occurring in the asteroid belt could alter the orbit of one such site, and eventually deliver it to Earth. +Plant seeds can be an alternative transport vessel. Some plants produce seeds that are resistant to the conditions of space, which have been shown to lie dormant in extreme cold, vacuum, and resist short wavelength UV radiation. They are not typically proposed to have originated in space, but on another planet. Theoretically, even if a plant is partially damaged during its travel in space, the pieces could still seed life in a sterile environment. Sterility of the environment is relevant because it is unclear if the novel plant could out-compete existing life forms. This idea is based on previous evidence showing that cellular reconstruction can occur from cytoplasms released from damaged algae. Furthermore, plant cells contain obligate endosymbionts, which could be released into a new environment. +Though both plant seeds and bacterial spores have been proposed as potentially viable vehicles, their ability to not only survive in space for the required time, but also survive atmospheric entry is debated. +Space probes may be a viable transport mechanism for interplanetary cross-pollination within the Solar System. Space agencies have implemented planetary protection procedures to reduce the risk of planetary contamination, but microorganisms such as Tersicoccus phoenicis may be resistant to spacecraft assembly cleaning. + +== Varieties of panspermia theory == + +Panspermia is generally subdivided into two classes: either transfer occurs between planets of the same system (interplanetary) or between stellar systems (interstellar). Further classifications are based on different proposed transport mechanisms, as follows. + +=== Radiopanspermia === +In 1903, Svante Arrhenius proposed radiopanspermia, the theory that singular microscopic forms of life can be propagated in space, driven by the radiation pressure from stars. This is the mechanism by which light can exert a force on matter. Arrhenius argued that particles at a critical size below 1.5 μm would be propelled at high speed by radiation pressure of a star. However, because its effectiveness decreases with increasing size of the particle, this mechanism holds for very tiny particles only, such as single bacterial spores. + +==== Counterarguments ==== +The main criticism of radiopanspermia came from Iosif Shklovsky and Carl Sagan, who cited evidence for the lethal action of space radiation (UV and X-rays) in the cosmos. If enough of these microorganisms are ejected into space, some may rain down on a planet in a new star system after 106 years wandering interstellar space. There would be enormous death rates of the organisms due to radiation and the generally hostile conditions of space, but nonetheless this theory is considered potentially viable by some. +Data gathered by the orbital experiments ERA, BIOPAN, EXOSTACK and EXPOSE showed that isolated spores, including those of B. subtilis, were rapidly killed if exposed to the full space environment for merely a few seconds, but if shielded against solar UV, the spores were capable of surviving in space for up to six years while embedded in clay or meteorite powder (artificial meteorites). Spores would therefore need to be heavily protected against UV radiation: exposure of unprotected DNA to solar UV and cosmic ionizing radiation would break it up into its constituent bases. Rocks at least 1 meter in diameter are required to effectively shield resistant microorganisms, such as bacterial spores against galactic cosmic radiation. Additionally, exposing DNA to the ultrahigh vacuum of space alone is sufficient to cause DNA damage, so the transport of unprotected DNA or RNA during interplanetary flights powered solely by light pressure is extremely unlikely. +The feasibility of other means of transport for the more massive shielded spores into the outer Solar System—for example, through gravitational capture by comets—is unknown. There is little evidence in full support of the radiopanspermia hypothesis. + +=== Lithopanspermia === +This transport mechanism generally arose following the growth of planetary science with the discovery of exoplanets and the sudden availability of data. Lithopanspermia is the proposed transfer of organisms in rocks from one planet to another through planetary objects such as in comets or asteroids; it remains speculative. A variant would be for organisms to travel between star systems on nomadic exoplanets or exomoons. +Although there is no concrete evidence that lithopanspermia has occurred in the Solar System, the various stages have become amenable to experimental testing. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Panspermia-3.md b/data/en.wikipedia.org/wiki/Panspermia-3.md new file mode 100644 index 000000000..7a7ca7ab0 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Panspermia-3.md @@ -0,0 +1,24 @@ +--- +title: "Panspermia" +chunk: 4/5 +source: "https://en.wikipedia.org/wiki/Panspermia" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:26.597459+00:00" +instance: "kb-cron" +--- + +Planetary ejection – For lithopanspermia to occur, microorganisms must first survive ejection from a planetary surface (assuming they do not form on meteorites, as suggested in), which involves extreme forces of acceleration and shock with associated temperature rises. Hypothetical values of shock pressures experienced by ejected rocks are obtained from Martian meteorites, which suggest pressures of approximately 5 to 55 GPa, acceleration of 3 Mm/s2, jerk of 6 million km/s3 and post-shock temperature increases of about 1 K to 1000 K. Though these conditions are extreme, some organisms appear able to survive them. +Survival in transit – Once in space, the microorganisms have to make it to their next destination for lithopanspermia to be successful. The survival of microorganisms has been studied extensively using both simulated facilities and in low Earth orbit. A large number of microorganisms have been selected for exposure experiments, both human-borne microbes (significant for future crewed missions) and extremophiles (significant for determining the physiological requirements of survival in space). Bacteria in particular can exhibit a survival mechanism whereby a colony generates a biofilm that enhances its protection against UV radiation. +Atmospheric entry – The final stage of lithopanspermia, is re-entry onto a viable planet via its atmosphere. This requires that the organisms are able to further survive potential atmospheric ablation. Tests of this stage could use sounding rockets and orbital vehicles. B. subtilis spores inoculated onto granite domes were twice subjected to hypervelocity atmospheric transit by launch to a ~120 km altitude on an Orion two-stage rocket. The spores survived on the sides of the rock, but not on the forward-facing surface that reached 145 °C. As photosynthetic organisms must be close to the surface of a rock to obtain sufficient light energy, atmospheric transit might act as a filter against them by ablating the surface layers of the rock. Although cyanobacteria can survive the desiccating, freezing conditions of space, the STONE experiment showed that they cannot survive atmospheric entry. Small non-photosynthetic organisms deep within rocks might survive the exit and entry process, including impact survival. +Lithopanspermia, described by the mechanism above, can be either interplanetary or interstellar. It is possible to quantify panspermia models and treat them as viable mathematical theories. For example, a recent study of planets of the Trappist-1 planetary system presents a model for estimating the probability of interplanetary panspermia, similar to studies in the past done about Earth-Mars panspermia. This study found that lithopanspermia is 'orders of magnitude more likely to occur' in the Trappist-1 system as opposed to the Earth-to-Mars scenario. According to their analysis, the increase in probability of lithopanspermia is linked to an increased probability of abiogenesis amongst the Trappist-1 planets. In a way, these modern treatments attempt to keep panspermia as a contributing factor to abiogenesis, as opposed to a theory that directly opposes it. In line with this, it is suggested that if biosignatures could be detected on two (or more) adjacent planets, that would provide evidence that panspermia is a potentially required mechanism for abiogenesis. As of yet, no such discovery has been made. +Lithopanspermia has also been hypothesized to operate between stellar systems. One mathematical analysis, estimating the total number of rocky or icy objects that could potentially be captured by planetary systems within the Milky Way, has concluded that lithopanspermia is not necessarily bound to a single stellar system. This not only requires these objects have life in the first place, but also that it survives the journey. Thus intragalactic lithopanspermia is heavily dependent on the survival lifetime of organisms, as well as the velocity of the transporter. Again, there is no evidence that such a process has, or can occur. + +==== Counterarguments ==== +The complex nature of the requirements for lithopanspermia, as well as evidence against the longevity of bacteria being able to survive under these conditions, makes lithopanspermia a difficult theory to support. That being said, impact events did occur often in the early solar system and still occur today, such as within the asteroid belt. + +=== Directed panspermia === + +First proposed in 1972 by Nobel prize winner Francis Crick along with Leslie Orgel, directed panspermia is the theory that life was deliberately brought to Earth by a higher intelligent being from another planet. In light of the evidence at the time that it seems unlikely for an organism to have been delivered to Earth via radiopanspermia or lithopanspermia, Crick and Orgel proposed this as an alternative theory, though it is worth noting that Orgel was less serious about the claim. They do acknowledge that the scientific evidence is lacking, but discuss what kinds of evidence would be needed to support the theory. In a similar vein, Thomas Gold suggested that life on Earth might have originated accidentally from a pile of 'Cosmic Garbage' dumped on Earth long ago by extraterrestrial beings. These theories are often considered more science fiction, however, Crick and Orgel use the principle of cosmic reversibility to argue for it. +This principle is based on the fact that if our species is capable of infecting a sterile planet, then what is preventing another technological society from having done that to Earth in the past? They concluded that it would be possible to deliberately infect another planet in the foreseeable future. As far as evidence goes, Crick and Orgel argued that given the universality of the genetic code, it follows that an infective theory for life is viable. +Directed panspermia could, in theory, be demonstrated by finding a distinctive 'signature' message had been deliberately implanted into either the genome or the genetic code of the first microorganisms by our hypothetical progenitor, some 4 billion years ago. However, there is no known mechanism that could prevent mutation and natural selection from removing such a message over long periods of time. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Panspermia-4.md b/data/en.wikipedia.org/wiki/Panspermia-4.md new file mode 100644 index 000000000..7a454215b --- /dev/null +++ b/data/en.wikipedia.org/wiki/Panspermia-4.md @@ -0,0 +1,44 @@ +--- +title: "Panspermia" +chunk: 5/5 +source: "https://en.wikipedia.org/wiki/Panspermia" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:26.597459+00:00" +instance: "kb-cron" +--- + +==== Counterarguments ==== +In 1972, both abiogenesis and panspermia were seen as viable theories by different experts. Given this, Crick and Orgel argued that experimental evidence required to validate one theory over the other was lacking. That being said, evidence strongly in favor of abiogenesis over panspermia exists today, whereas evidence for panspermia, particularly directed panspermia, is decidedly lacking. + +=== Origination and distribution of organic molecules: Pseudo-panspermia === + +Pseudo-panspermia is the well-supported hypothesis that many of the small organic molecules used for life originated in space, and were distributed to planetary surfaces. Life then emerged on Earth, and perhaps on other planets, by the processes of abiogenesis. Evidence for pseudo-panspermia includes the discovery of organic compounds such as sugars, amino acids, and nucleobases in meteorites and other extraterrestrial bodies, and the formation of similar compounds in the laboratory under outer space conditions. A prebiotic polyester system has been explored as an example. + +== Hoaxes and speculations == + +=== Orgueil meteorite === +On May 14, 1864, twenty fragments from a meteorite crashed into the French city of Orgueil. A separate fragment of the Orgueil meteorite (kept in a sealed glass jar since its discovery) was found in 1965 to have a seed capsule embedded in it, while the original glassy layer on the outside remained undisturbed. Despite great initial excitement, the seed was found to be that of a European Juncaceae or rush plant that had been glued into the fragment and camouflaged using coal dust. The outer "fusion layer" was in fact glue. While the perpetrator of this hoax is unknown, it is thought that they sought to influence the 19th-century debate on spontaneous generation—rather than panspermia—by demonstrating the transformation of inorganic to biological matter. + +=== Oumuamua === + +In 2017, the Pan-STARRS telescope in Hawaii detected a reddish object with significant, periodic fluctiations in albedo, strongly suggestive of a slender, rotating object. Analysis of its orbit provided evidence that it was an interstellar object, originating from outside the Solar System, accelerating away from the Sun with the absence of the visible outgassing that usually explains the acceleration of asteroids. Astronomer Avi Loeb argues that there are no satisfying natural explanations for this acceleration, and proposes that Oumuamua may be a solar sail, which would be partial evidence for the feasibility of directed panspermia. This claim has been considered unlikely by other authors. + +== See also == +Abiogenesis – Life arising from non-living matter +Astrobiology – Science concerned with life in the universe +Cryptobiosis – Metabolic state of life +List of microorganisms tested in outer space +Planetary protection – Prevention of interplanetary biological contamination + +== References == + +== Further reading == + +Crick, Francis (1981), Life, Its Origin and Nature, Simon & Schuster, ISBN 978-0-7088-2235-7 +Hoyle, Fred (1983), The Intelligent Universe, London: Michael Joseph, Bibcode:1983inun.book.....H, ISBN 978-0-7181-2298-0 + +== External links == +Cox, Brian. "Are we thinking about alien life all wrong?". BBC Ideas, video made by Pomona Pictures, 29 November 2021. +Loeb, Abraham. "Did Life from Earth Escape the Solar System Eons Ago?". Scientific American, 4 November 2019 +Loeb, Abraham. "Noah's Spaceship" Scientific American, 29 November 2020 \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-0.md b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-0.md new file mode 100644 index 000000000..f805722cb --- /dev/null +++ b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-0.md @@ -0,0 +1,27 @@ +--- +title: "Pre-Columbian transoceanic contact theories" +chunk: 1/11 +source: "https://en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:31.175412+00:00" +instance: "kb-cron" +--- + +Pre-Columbian transoceanic contact theories, many of which are speculative, propose that visits to the Americas, interactions with the Indigenous peoples of the Americas, or both, were made by people from elsewhere prior to Christopher Columbus's first voyage to the Caribbean in 1492. Studies between 2004 and 2009 suggest the possibility that the earliest human migrations to the Americas may have been made by boat from Beringia and travel down the Pacific coast, contemporary with and possibly predating land migrations over the Beringia land bridge, which during the glacial period joined what today are Siberia and Alaska. Apart from Norse contact and settlement, whether transoceanic travel occurred during the historic period, resulting in pre-Columbian contact between the settled American peoples and voyagers from other continents, is vigorously debated. +Only a few cases of pre-Columbian contact are widely accepted by mainstream scientists and scholars. Yup'ik and Aleut peoples residing on both sides of the Bering Strait had frequent contact with each other, and multiple artifacts traded across the Bering Strait have been discovered in pre-Columbian archaeological sites in Alaska. Maritime explorations by Norse peoples from Scandinavia during the late 10th century led to the Norse colonization of Greenland and a base camp L'Anse aux Meadows in Newfoundland, which preceded Columbus's arrival in the Americas by some 500 years. Recent genetic studies have also suggested that some eastern Polynesian populations have admixture from coastal western South American peoples, with an estimated date of contact around 1200 CE. +Scientific and scholarly responses to other claims of post-prehistory, pre-Columbian transoceanic contact have varied. Some of these claims are examined in reputable peer-reviewed sources. Many others are based only on circumstantial or ambiguous interpretations of archaeological evidence, the discovery of alleged out-of-place artifacts, superficial cultural comparisons, comments in historical documents, or narrative accounts. These have been dismissed as fringe science, pseudoarchaeology, or pseudohistory. + +== Claims of Polynesian contact == + +=== Human genetics === +Between 2007 and 2009, geneticist Erik Thorsby and colleagues published two studies in Tissue Antigens that offer evidence of an Amerindian genetic contribution to human populations on Easter Island, determining that it was probably introduced before European discovery of the island. In 2014, geneticist Anna-Sapfo Malaspinas of the Center for GeoGenetics at the University of Copenhagen published a study in Current Biology that found human genetic evidence of contact between the populations of Easter Island and South America, dating to approximately 600 years ago (i.e. 1400 CE ± 100 years). In 2017, a comprehensive genomes study found "no Native American admixture in pre- and post-European-contact individuals". +Two skulls suggested to belong to "Botocudo" people (a term used to refer to Native Americans who live in the interior of Brazil that speak Macro-Jê languages), were found in research published in 2013 to have been members of mtDNA haplogroup B4a1a1, which is normally found only among Polynesians and other subgroups of Austronesians. This was based on an analysis of 14 skulls. Two belonged to B4a1a1, while twelve belonged to subclades of mtDNA haplogroup C1 (common among Native Americans). The research team examined various scenarios, none of which they could say for certain were correct. They dismissed a scenario of direct contact in prehistory between Polynesia and Brazil as "too unlikely to be seriously entertained." While B4a1a1 is also found among the Malagasy people of Madagascar (which experienced significant Austronesian settlement in prehistory), the authors described as "fanciful" suggestions that B4a1a1 among the Botocudo resulted from the African slave trade (which included Madagascar). A later review paper of Polynesian history suggested that it was "more likely that these are the skulls of two people who died in Polynesia sometime early in the period of European voyaging, and whose graves were robbed by later visitors, and then mistakenly grouped in collections with the remains of Native Americans." +In 2020, a study in Nature found that populations in the Mangareva, Marquesas, and Palliser islands and Easter Island had genetic admixture from indigenous populations of South America, with the DNA of contemporary populations of Zenú people from the Pacific coast of Colombia being the closest match. The authors suggest that the genetic signatures were probably the result of a single ancient contact. They proposed that an initial admixture event between indigenous South Americans and Polynesians occurred in eastern Polynesia between 1150 and 1230 CE, with later admixture in Easter Island around 1380 CE, but suggested other possible contact scenarios—for example, Polynesian voyages to South America followed by Polynesian people's returning to Polynesia with South American people, or carrying South American genetic heritage. Several scholars uninvolved in the study suggested that a contact event in South America was more likely. Further genetic analysis on Easter Island indigenous population showed about 10% of the genome to be of Native American origin. + +=== Plant genetics === +The genetics of several plant species has also been used to support pre-Columbian contact via the Pacific. For example, there is a genetically distinct sub-population of coconuts on the western coast of South America. This has been suggested to be evidence of introduction by Austronesian seafarers. + +=== Sweet potato === + +The sweet potato, a food crop native to the Americas, was widespread in Polynesia by the time European explorers first reached the Pacific. Sweet potato has been radiocarbon-dated to 1000 CE in the Cook Islands. Current thinking is that it was brought to central Polynesia c. 700 CE and spread across Polynesia from there. It has been suggested that it was brought by Polynesians who had traveled across the Pacific to South America and back, or that South Americans brought it to Polynesia. It is also possible that the plant floated across the ocean after being discarded from the cargo of a boat. According to the "tripartite hypothesis", phylogenetic analysis supports at least two separate introductions of sweet potatoes from South America into Polynesia, including one before and one after European contact. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-1.md b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-1.md new file mode 100644 index 000000000..f752f3d49 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-1.md @@ -0,0 +1,35 @@ +--- +title: "Pre-Columbian transoceanic contact theories" +chunk: 2/11 +source: "https://en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:31.175412+00:00" +instance: "kb-cron" +--- + +Dutch linguists and specialists in Amerindian languages Willem Adelaar and Pieter Muysken have suggested that the word for sweet potato is shared by Polynesian languages and languages of South America. Proto-Polynesian *kumala (compare Easter Island kumara, Hawaiian ʻuala, Māori kūmara; even though a proto-form is reconstructed above, apparent cognates outside Eastern Polynesian are either definitely borrowed from Eastern Polynesian languages or irregular, calling Proto-Polynesian status and age into question) may be connected with dialectal Quechua and Aymara k'umar ~ k'umara; most Quechua dialects actually use apichu instead, but comal was attested at extinct Cañari language on the coast of what is now Ecuador in 1582. +Adelaar and Muysken assert that the similarity in the word for sweet potato "constitutes near proof of incidental contact between inhabitants of the Andean region and the South Pacific." The authors argue that the presence of the word for sweet potato suggests sporadic contact between Polynesia and South America, but not necessarily migrations. + +=== Ageratum conyzoides === +Ageratum conyzoides, also known as billygoat-weed, chick weed, goatweed, or whiteweed, is native to the tropical Americas, and was found in Hawaii by William Hillebrand in 1888 who considered it to have grown there before Captain Cook's arrival in 1778. A legitimate native name (meie parari or mei rore) and established native medicinal usage and use as a scent and in leis have been offered as support for the pre-Cookian age. + +=== Turmeric === +Turmeric (Curcuma longa) originated in Asia, and there is linguistic and circumstantial evidence of the spread and use of turmeric by the Austronesian peoples into Oceania and Madagascar. Günter Tessmann in 1930 (300 years after European contact) reported that a species of Curcuma was grown by the Amahuaca tribe to the east of the Upper Ucayali River in Peru and was a dye-plant used for the painting of the body, with the nearby Witoto people using it as face paint in their ceremonial dances. David Sopher noted in 1950 that "the evidence for a pre-European, transpacific introduction of the plant by man seems very strong indeed". + +=== Physical anthropology === + +In December 2007, several human skulls were found in a museum in Concepción, Chile. These skulls originated on Mocha Island, an island which is located just off the coast of Chile on the Pacific Ocean, formerly inhabited by the Mapuche. Craniometric analysis of the skulls, according to Lisa Matisoo-Smith of the University of Otago and José Miguel Ramírez Aliaga of the Universidad de Valparaíso, suggests that the skulls have "Polynesian features" – such as a pentagonal shape when they are viewed from behind, and rocker jaws. +Rocker jaws have also been found at an excavation led José Miguel Ramírez in the coastal locality of Tunquén, Central Chile. The site of excavation corresponds to an area with pre-Hispanic tombs and shell middens (Spanish: conchal). A global review of rocker jaws among different populations show that while rocker jaws are not unique to Polynesians "[t]he rarity of rocker jaw in South American natives supports" the view of "Polynesian voyagers who ventured to the west coast of South America". + +=== Disputed evidence === + +==== Araucanian chickens ==== +In 2007, evidence emerged which suggested the possibility of pre-Columbian contact between the Mapuche people (Araucanians) of south-central Chile and Polynesians. Bones of Araucana chickens found at El Arenal site in the Arauco Peninsula, an area inhabited by Mapuche, support a pre-Columbian introduction of landraces from the South Pacific islands to South America. The bones found in Chile were radiocarbon-dated to between 1304 and 1424, before the arrival of the Spanish. Chicken DNA sequences were matched to those of chickens in American Samoa and Tonga, and found to be dissimilar to those of European chickens. +However, this finding was challenged by a 2008 study which questioned its methodology and concluded that its conclusion is flawed, although the theory it posits may still be possible. Another study in 2014 reinforced that dismissal, and posited the crucial flaw in the initial research: "The analysis of ancient and modern specimens reveals a unique Polynesian genetic signature" and that "a previously reported connection between pre-European South America and Polynesian chickens most likely resulted from contamination with modern DNA, and that this issue is likely to confound ancient DNA studies involving haplogroup E chicken sequences." +However, in a 2013 study, the original authors extended and elaborated their findings, concluding: + +This comprehensive approach demonstrates that the examination of modern chicken DNA sequences does not contribute to our understanding of the origins of Chile's earliest chickens. Interpretations based on poorly sourced and documented modern chicken populations, divorced from the archeological and historical evidence, do not withstand scrutiny. Instead, this expanded account will confirm the pre-Columbian age of the El Arenal remains and lend support to our original hypothesis that their appearance in South America is most likely due to Polynesian contact with the Americas in prehistory. +A 2019 study of South American chickens "revealed an unknown genetic component that is mostly present in the Easter Island population that is also present in local chicken populations from the South American Pacific fringe". The Easter Island chicken's "genetic proximity with the SA continental gamefowl can be explained by the fact that both populations were not crossed with cosmopolitan breeds and therefore remain closer to the ancestral population that originated them. " The genetic proximity might also "be indicative of a common origin of these two populations". + +==== California canoes ==== \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-10.md b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-10.md new file mode 100644 index 000000000..c057c9828 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-10.md @@ -0,0 +1,31 @@ +--- +title: "Pre-Columbian transoceanic contact theories" +chunk: 11/11 +source: "https://en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:31.175412+00:00" +instance: "kb-cron" +--- + +=== Claims of pre-Columbian contact with Christian voyagers === +During the period of Spanish colonization of the Americas, several indigenous myths and works of art led a number of Spanish chroniclers and authors to suggest that Christian preachers may have visited Mesoamerica well before the Age of Discovery. Bernal Díaz del Castillo, for example, was intrigued by the presence of cross symbols in Maya hieroglyphs, which according to him suggested that other Christians may have arrived in ancient Mexico before the Spanish conquistadors. Fray Diego Durán, for his part, linked the legend of the Pre-Columbian god Quetzalcoatl (whom he describes as being chaste, penitent, and a miracle-worker) to the Biblical accounts of Christian apostles. Bartolomé de las Casas describes Quetzalcoatl as being fair-skinned, tall, and bearded (therefore suggesting an Old World origin), while Fray Juan de Torquemada credits him with bringing agriculture to the Americas. Modern scholarship has cast serious doubts on several of these claims, since agriculture was practiced in the Americas well before the emergence of Christianity in the Old World, and Maya crosses have been found to have a very different symbolism from that present in Christian religious traditions. +According to Pre-Columbian myth, Quetzalcoatl departed Mexico in ancient times by travelling east across the ocean, promising he would return. Some scholars have argued that Aztec emperor Moctezuma Xocoyotzin believed Spanish conquistador Hernán Cortés (who arrived in what today is Mexico from the east) to be Quetzalcoatl, and his arrival to be a fulfilling of the myth's prophecy, though others have disputed this claim. Fringe theories suggest that Quetzalcoatl may have been a Christian preacher from the Old World who lived among indigenous peoples of ancient Mexico, and eventually attempted to return home by sailing eastwards. Carlos de Sigüenza y Góngora, for example, speculated that the Quetzalcoatl myth might have originated from a visit to the Americas by Thomas the Apostle in the 1st century CE. Later on, Fray Servando Teresa de Mier argued that the cloak with the image of the Virgin of Guadalupe, which the Catholic Church claims was worn by Juan Diego, was instead brought to the Americas much earlier by Thomas, who used it as an instrument for evangelization. +Mexican historian Manuel Orozco y Berra conjectured that both the cross hieroglyphs and the Quetzalcoatl myth might have originated on a visit to Mesoamerica by a Catholic Norse missionary in medieval times. However, there is no archaeological or historical evidence to suggest that the Norse explorations ever made it as far as ancient Mexico or Central America. Other proposed identities for Quetzalcoatl (attributed to their proponents pursuing religious agendas) include St. Brendan or even Jesus Christ. +A popular thread of conspiracy theory originating with Holy Blood, Holy Grail has it that the Templars used a fleet of 18 ships at La Rochelle to escape arrest in France. The fleet allegedly left laden with knights and treasures just before the issue of the warrant for the arrest of the Order in October 1307. This, in turn, was based on a single item of testimony from serving brother Jean de Châlon, who says he had "heard people talking that [Gerard de Villiers had] put to sea with 18 galleys, and the brother Hugues de Chalon fled with the whole treasury of the brother Hugues de Pairaud." However, aside from being the sole source for this statement, the transcript indicates that it is hearsay, and this serving brother seems to be prone to making some of the wildest and most damning of claims about the Order, which have led some to doubt his credibility. What destination, if any, was reached by this fleet is uncertain. A fringe theory suggests the fleet may have made its way to the Americas, where the Knights Templar interacted with the aboriginal population. Helen Nicholson of Cardiff University has cast doubt on the existence of this voyage, arguing that the Knights Templar did not have ships capable of navigating the Atlantic Ocean. + +=== Claims of ancient Jewish migration to the Americas === + +From the first centuries of European colonization of the Americas until the 19th century, several European intellectuals and theologians tried to account for the presence of the Amerindian aboriginal peoples by connecting them to the Ten Lost Tribes of Israel, who according to Biblical tradition were deported following the conquest of the Israelite kingdom by the Neo-Assyrian Empire. These efforts have been used to further the interests of religious groups, both Jewish and Christian, and they have also been used to justify European settlement of the Americas. + +One of the first people to claim that the indigenous peoples of the Americas were descendants of the Lost Tribes was the Portuguese rabbi and writer Menasseh Ben Israel (1604-1657), who argued in his book The Hope of Israel that the discovery of the alleged long-lost Jews heralded the imminent coming of the Biblical Messiah. In 1650, a Norfolk preacher, Thomas Thorowgood, published Jewes in America or Probabilities that the Americans are of that Race, for the New England missionary society. Tudor Parfitt writes:The society was active in trying to convert the Indians but suspected that they might be Jews and realized they better be prepared for an arduous task. Thorowgood's tract argued that the native population of North America were descendants of the Ten Lost Tribes. +In 1652, Sir Hamon L'Estrange, an English author writing on history and theology, published Americans no Jews, or improbabilities that the Americans are of that Race in response to the tract by Thorowgood. In response to L'Estrange, Thorowgood published a second edition of his book in 1660 with a revised title and included a foreword written by John Eliot, a Puritan missionary who had translated the Bible into an Indian language. +Elias Boudinot, a signatory to the U.S. Declaration of Independence, made similar claims in his 1816 book titled A Star in the West: A Humble Attempt to Discover the Long Lost Ten Tribes of Israel; Preparatory to Their Return to Their Beloved City, Jerusalem. + +=== Latter Day Saint movement's teachings === + +The Book of Mormon, a sacred text of the Latter Day Saint movement, states that some ancient inhabitants of the New World are descendants of Semitic peoples who sailed from the Old World. There is no support from genetic studies and archaeology for the historicity of the Book of Mormon or Middle Eastern origins for any Native American peoples. Since the 1850s Mormon leaders have identified Polynesian islands with the "islands of the sea" discussed in the Book of Mormon and taught that the people there were descendants of Israelite people. In a 1998 letter, the National Geographic Society stated it "does not know of anything found so far that has substantiated the Book of Mormon." Some LDS scholars hold the view that archaeological studies of the Book of Mormon's claims are not meant to vindicate the literary narrative. For example, Terryl Givens, professor of English at the University of Richmond, argues that there is a lack of historical accuracy in the Book of Mormon in relation to modern archaeological knowledge. + +== See also == + +== References == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-2.md b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-2.md new file mode 100644 index 000000000..cfcb9ad5a --- /dev/null +++ b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-2.md @@ -0,0 +1,28 @@ +--- +title: "Pre-Columbian transoceanic contact theories" +chunk: 3/11 +source: "https://en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:31.175412+00:00" +instance: "kb-cron" +--- + +Researchers including Kathryn Klar and Terry Jones have proposed a theory of contact between Hawaiians and the Chumash people of Southern California between 400 and 800 CE. The sewn-plank canoes crafted by the Chumash and neighboring Tongva are unique among the indigenous peoples of North America, but similar in design to larger canoes used by Polynesians and Melanesians for deep-sea voyages. Tomolo'o, the Chumash word for such a craft, may derive from tumulaʻau/kumulaʻau, the Hawaiian term for the logs from which shipwrights carve planks to be sewn into canoes. The analogous Tongva term, tii'at, is unrelated. If it occurred, this contact left no genetic legacy in California or Hawaii. This theory has attracted limited media attention within California, but most archaeologists of the Tongva and Chumash cultures reject it on the grounds that the independent development of the sewn-plank canoe over several centuries is well-represented in the material record. + +==== Clava hand-club and words for axes ==== +Archaeological artefacts known as clava hand-clubs found in Araucanía and nearby areas of Argentina have a strong resemblance to the mere okewa found in New Zealand. The clava hand-clubs are also mentioned in the Spanish chronicles dating to the Conquest of Chile. According to Grete Mostny, clava hand-clubs "appear to have arrived to the west coast of South America from the Pacific". Polynesian clubs from Chatham Islands are reportedly the most similar to those of Chile. The clava hand-club is one of various Polynesian-like Mapuche artifacts known. +Possible linguistic evidence for Austronesian-American contact is found in words for axes. On Easter Island, the word for a stone axe is toki; among the New Zealand Maori, the word toki denotes an adze. Similar words are found in the Americas: In the Mapuche language of Chile and Argentina, the word for a stone axe is toki; and further afield in Colombia, the Yurumanguí word for an axe is totoki. +Stone adzes often had ceremonial value and were worn by Maori chiefs. The Mapuche word toki may also mean "chief" and thus may be related to the Quechua word toqe ("militia chief") and the Aymara word toqueni ("person of great judgement"). In the view of Moulian et al. (2015) the possible South American links complicate matters regarding the meaning of the word toki because they are suggestive of Polynesian contact. + +== Population Y == +A 2015 study found some Indigenous American groups, particularly those in the Amazon, carry a small admixture (around 1-2% of the genome) related to groups in Southeast Asia and Australasia like Andamanese peoples, Indigenous Australians, Papuans and the Mamanwa people of the Philippines. This ancestry component has been dubbed "Population Y". Some authors have suggested that this reflects a trans-Pacific migration, but scholars have suggested that this more likely reflects genetic heterogeneity in the initial founding population of Native Americans present in Beringia, only some of which carried the "Population Y" ancestry. It has also been noted that a 40,000 year old individual from Tianyuan Cave in northern China also carries this ancestry, making it more likely that this ancestry was the result of contact in Eurasia, prior to the arrival of the ancestors of Native Americans in Beringia. + +== Claims of East Asian contact == + +=== Claims of contact with Ecuador === +A 2013 genetic study suggested the possibility of contact between Ecuador and East Asia, that would have happened no earlier than 6,000 years ago (4000 BC) via either a trans-oceanic or a late-stage coastal migration that did not leave genetic imprints in North America. Further research did not support this but was rather "a case of a rare founding lineage that has been lost elsewhere by drift." + +=== Claims of Chinese contact === + +Some researchers have argued that the Olmec civilization came into existence with the help of Chinese refugees, particularly at the end of the Shang dynasty. In 1975, Betty Meggers of the Smithsonian Institution argued that the Olmec civilization originated around 1200 BCE due to Shang Chinese influences. In a 1996 book, Mike Xu, with the aid of Chen Hanping, claimed that celts from La Venta bear Chinese characters. These claims are unsupported by mainstream Mesoamerican researchers. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-3.md b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-3.md new file mode 100644 index 000000000..ee0e697ab --- /dev/null +++ b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-3.md @@ -0,0 +1,25 @@ +--- +title: "Pre-Columbian transoceanic contact theories" +chunk: 4/11 +source: "https://en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:31.175412+00:00" +instance: "kb-cron" +--- + +Other claims of early Chinese contact with North America have been made. In 1882, approximately 30 brass coins, perhaps strung together, were reportedly found in the area of the Cassiar Gold Rush, apparently near Dease Creek, an area which was dominated by Chinese gold miners. A contemporary account states:In the summer of 1882 a miner found on De Foe (Deorse?) creek, Cassiar district, Br. Columbia, thirty Chinese coins in the auriferous sand, twenty-five feet below the surface. They appeared to have been strung, but on taking them up the miner let them drop apart. The earth above and around them was as compact as any in the neighborhood. One of these coins I examined at the store of Chu Chong in Victoria. Neither in metal nor markings did it resemble the modern coins, but in its figures looked more like an Aztec calendar. So far as I can make out the markings, this is a Chinese chronological cycle of sixty years, invented by Emperor Huungti, 2637 BCE, and circulated in this form to make his people remember it. +Grant Keddie, curator of archeology at the Royal B.C. Museum, identified these as good luck temple tokens which were minted in the 19th century. He believed that claims that these were very old made them notorious and he wrote that "The temple coins were shown to many people and different versions of stories pertaining to their discovery and age spread around the province to be put into print and changed frequently by many authors in the last 100 years." +A group of Chinese Buddhist missionaries led by Hui Shen before 500 CE claimed to have visited a location called Fusang. Although Chinese mapmakers placed this territory on the Asian coast, others have suggested as early as the 1800s that Fusang might have been in North America, due to perceived similarities between portions of the California coast and Fusang as depicted by Asian sources. +In his debunked pseudohistorical book 1421: The Year China Discovered the World, British author Gavin Menzies claimed that the treasure fleets of Ming admiral Zheng He arrived in America in 1421. The consensus among professional historians is that Zheng He only reached the eastern coast of Africa, and they dismiss Menzies's claims as entirely without evidence. +In 1973 and 1975, doughnut-shaped stones that resembled stone anchors which were used by Chinese fishermen were discovered off the coast of California. These stones (sometimes called the Palos Verdes stones) were initially thought to be up to 1,500 years old and therefore, they were thought to be proof of pre-Columbian contact by Chinese sailors. Later geological investigations showed that they were made of a local rock which is known as Monterey shale, and it is currently believed that they were used by Chinese settlers who fished off the coast during the 19th century. + +=== Claims of Japanese contact === + +Archaeologist Emilio Estrada and co-workers wrote that pottery which was associated with the Valdivia culture of coastal Ecuador and dated to 3000–1500 BCE exhibited similarities to pottery which was produced during the Jōmon period in Japan, arguing that contact between the two cultures might explain the similarities. Chronological and other problems have led most archaeologists to dismiss this idea as implausible. The suggestion has been made that the resemblances (which are not complete) are simply due to the limited number of designs possible when incising clay. +Alaskan anthropologist Nancy Yaw Davis claims that the Zuni people of New Mexico exhibit linguistic and cultural similarities to the Japanese. The Zuni language is a linguistic isolate, and Davis contends that the culture appears to differ from that of the surrounding natives in terms of blood type, endemic disease, and religion. Davis speculates that Buddhist priests or restless peasants from Japan may have crossed the Pacific in the 13th century, traveled to the American Southwest, and influenced Zuni society. +In the 1890s, lawyer and politician James Wickersham argued that pre-Columbian contact between Japanese sailors and Native Americans was highly probable, given that from the early 17th century to the mid-19th century several dozen Japanese ships are known to have been carried from Asia to North America along the powerful Kuroshio Currents. Japanese ships landed at places between the Aleutian Islands in the north and Mexico in the south, carrying a total of 293 people in the 23 cases where head-counts were given in historical records. In most cases, the Japanese sailors gradually made their way home on merchant vessels. In 1834, a dismasted, rudderless Japanese ship was wrecked near Cape Flattery in the Pacific Northwest. Three survivors of the ship were enslaved by Makahs for a period before being rescued by members of the Hudson's Bay Company. Another Japanese ship went ashore in about 1850 near the mouth of the Columbia River, Wickersham writes, and the sailors were assimilated into the local Native American population. While admitting there is no definitive proof of pre-Columbian contact between Japanese and North Americans, Wickersham thought it implausible that such contacts as outlined above would have started only after Europeans arrived in North America and began documenting them. + +== Claims of Indian contact == + +In 1879, Alexander Cunningham wrote a description of the carvings on the Stupa of Bharhut in central India, dating from c. 200 BCE, among which he noted what appeared to be a depiction of a custard-apple (Annona squamosa). Cunningham was not initially aware that this plant, indigenous to the New World tropics, was introduced to India after Vasco da Gama's discovery of the sea route in 1498, and the problem was pointed out to him. A 2009 study claimed to have found carbonized remains that date to 2000 BCE and appear to be those of custard-apple seeds. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-4.md b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-4.md new file mode 100644 index 000000000..c7e5b66f0 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-4.md @@ -0,0 +1,35 @@ +--- +title: "Pre-Columbian transoceanic contact theories" +chunk: 5/11 +source: "https://en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:31.175412+00:00" +instance: "kb-cron" +--- + +Grafton Elliot Smith claimed that certain motifs present in the carvings on the Mayan stelae at Copán represented the Asian elephant, and wrote a book on the topic entitled Elephants and Ethnologists in 1924. Contemporary archaeologists suggested that the depictions were almost certainly based on the (indigenous) tapir, with the result that Smith's suggestions have generally been dismissed by subsequent research. +Some objects depicted in carvings from Karnataka, dating from the 12th century, that resemble ears of maize (Zea mays—a crop native to the New World), were interpreted by Carl Johannessen and Ann Parker in 1989 as evidence of pre-Columbian contact. These suggestions were dismissed by multiple Indian researchers based on several lines of evidence. The object has been claimed by some to instead represent a "Muktaphala", an imaginary fruit bedecked with pearls. +Ethnobotanist and Indologist Shakti M. Gupta concurs with Johannessen and Parker that the objects in question are maize ears: + +Different varieties of the corn cob [Zea mays Linn.] are extensively sculpted [...] on the Hindu and Jain temples of Karnataka. [...] The straight rows of the corn grains can easily be identified. [...] Temples where the corn cobs are found are dated 12-13th century A.D. [...] By the time these temples were constructed, maize would have been fairly common in India. +Gupta also identifies custard apple, sunflower, pineapple, cashew, and monstera, all New World plants, in Indian temple art. + +== Claims of African and West Asian contact == + +=== Claims of African contact === + +Proposed claims for an African presence in Mesoamerica stem from attributes of the Olmec culture, the claimed transfer of African plants to the Americas, and interpretations of European and Arabic historical accounts. +In 1922, Leo Wiener attested in Africa and the Discovery of America that there are similarities between the Mandinka people of West Africa and native Mesoamerican religious symbols such as the winged serpent and the sun disk, or Quetzalcoatl, and words that have Mandé roots and share similar meanings across both cultures, such as "kore", "gadwal", and "qubila" (in Arabic) or "kofila" (in Mandinka). +The Olmec culture existed in what is now southern Mexico from roughly 1200 BCE to 400 BCE. The idea that the Olmecs are related to Africans was first suggested by José Melgar, who discovered the first colossal head at Hueyapan (now Tres Zapotes) in 1862. More recently, Ivan Van Sertima speculated an African influence on Mesoamerican culture in his book They Came Before Columbus (1976). His claims included the attribution of Mesoamerican pyramids, calendar technology, mummification, and mythology to the arrival of Africans by boat on currents running from Western Africa to the Americas. Heavily inspired by Leo Wiener (see above), Van Sertima suggested that the Aztec god Quetzalcoatl represented an African visitor. His conclusions have been severely criticized by mainstream academics and considered pseudoarchaeology. +Malian sources describe what some consider to be visits to the New World by a fleet from the Mali Empire in 1311, led by Abu Bakr II. According to the only known primary-source-based copy of Christopher Columbus's journal (transcribed by Bartolomé de las Casas), the purpose of Columbus's third voyage was to test both (1) the claims of King John II of Portugal that "canoes had been found which set out from the coast of Guinea [West Africa] and sailed to the west with merchandise" and (2) the claims of the native inhabitants of the Caribbean island of Hispaniola that "there had come to Española from the south and south-east, a black people who have the tops of their spears made of a metal which they call guanin, of which he had sent samples to the Sovereigns to have them assayed, when it was found that of 32 parts, 18 were of gold, 6 of silver and 8 of copper". +Brazilian researcher Niede Guidon, who led the excavations of the Pedra Furada sites, "said she believed that humans...might have come not overland from Asia but by boat from Africa", with the journey taking place 100,000 years ago, well before the accepted dates for the earliest human migrations that led to the prehistoric settlement of the Americas. Michael R. Waters, a geoarchaeologist at Texas A&M University, noted the absence of genetic evidence in modern populations to support Guidon's claim. + +=== Claims of Arab contact === +Early Chinese accounts of Muslim expeditions state that Muslim sailors reached a region called Mulan Pi ("magnolia skin") (Chinese: 木蘭皮; pinyin: Mùlán Pí; Wade–Giles: Mu-lan-p'i). Mulan Pi is mentioned in Lingwai Daida (1178) by Zhou Qufei and Zhufan Zhi (1225) by Chao Jukua, together referred to as the "Sung Document". Mulan Pi is normally identified as Spain and Morocco of the Almoravid dynasty (Al-Murabitun), though some fringe theories hold that it is instead some part of the Americas. +One supporter of the interpretation of Mulan Pi as part of the Americas was historian Hui-lin Li in 1961, and while Joseph Needham was also open to the possibility, he doubted that Arab ships at the time would have been able to withstand a return journey over such a long distance across the Atlantic Ocean, pointing out that a return journey would have been impossible without knowledge of prevailing winds and currents. + +According to Muslim historian Abu al-Hasan Ali al-Mas'udi (871–957), Khashkhash Ibn Saeed Ibn Aswad sailed over the Atlantic Ocean and discovered a previously unknown land (Arḍ Majhūlah, Arabic: أرض مجهولة) in 889 and returned with a shipload of valuable treasures. The passage has been alternatively interpreted to imply that Ali al-Masudi regarded the story of Khashkhash to be a fanciful tale. +Professor Fuat Sezgin authored a paper titled "The Pre-Columbian Discovery of the American Continent by Muslim Sea-Farers". In it, he examines several maps and travel accounts, and concludes that it is quite possible that Muslim sailors reached the eastern shores of South America. + +=== Claims of ancient Phoenician contact === \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-5.md b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-5.md new file mode 100644 index 000000000..e55f845be --- /dev/null +++ b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-5.md @@ -0,0 +1,37 @@ +--- +title: "Pre-Columbian transoceanic contact theories" +chunk: 6/11 +source: "https://en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:31.175412+00:00" +instance: "kb-cron" +--- + +In 1996, Mark McMenamin proposed that Phoenician sailors discovered the New World c. 350 BC. The Phoenician state of Carthage minted gold staters in 350 BC bearing a pattern in the reverse exergue of the coins, which McMenamin initially interpreted as a map of the Mediterranean with the Americas shown to the west across the Atlantic. McMenamin later demonstrated that these coins found in America were modern forgeries. + +=== Claims of ancient Judaic contact === + +The Bat Creek inscription and Los Lunas Decalogue Stone have led some to suggest the possibility that Jewish seafarers may have traveled to America after they fled from the Roman Empire at the time of the Jewish–Roman Wars in the 1st and 2nd centuries CE. +However, American archaeologists Robert C. Mainfort Jr. and Mary L. Kwas argued in American Antiquity (2004) that the Bat Creek inscription was copied from an illustration in an 1870 Masonic reference book and introduced by the Smithsonian field assistant who found it during excavation activities. +As for the Decalogue Stone, there are mistakes which suggest that it was carved by one or more novices who either overlooked or misunderstood some details on a source Decalogue from which they copied it. Since there is no other evidence or archaeological context in the vicinity, it is most likely that the legend at the nearby university is true—that the stone was carved by two anthropology students whose signatures can be seen inscribed in the rock below the Decalogue, "Eva and Hobe 3-13-30." +Scholar Cyrus H. Gordon believed that Phoenicians and other Semitic-speaking groups had crossed the Atlantic in antiquity, ultimately arriving in both North and South America. This opinion was based on his own work on the Bat Creek inscription. Similar ideas were also held by John Philip Cohane; Cohane even claimed that many geographical placenames in the United States have a Semitic origin. + +== Claims of European contact == + +=== Solutrean hypothesis === + +The Solutrean hypothesis argues that Europeans migrated to the New World during the Paleolithic era, circa 16,000 to 13,000 BCE. This hypothesis proposes contact partly on the basis of perceived similarities between the flint tools of the Solutrean culture in modern-day France, Spain, and Portugal (which thrived circa 20,000 to 15,000 BCE), and the Clovis culture of North America, which developed circa 9,000 BCE. +The Solutrean hypothesis was proposed in the mid-1990s. It has little support amongst the scientific community, and genetic markers are inconsistent with the idea. + +=== Claims of contact in antiquity === + +Claims have been made for contact in Classical Antiquity, primarily with the Roman Empire, but sometimes also with other contemporaneous cultures. Lucio Russo proposed that the classical idea of the inhabited world, from the Isles of the Blessed to the capital of the Seres, spanning 180° of longitude was based on the Isles of the Blessed being the Lesser Antilles. +Claims of contacts with the civilizations of antiquity have been based on isolated archaeological finds in American sites that originated in the Old World. For example, the Bay of Jars in Brazil has been yielding ancient clay storage jars that resemble Roman amphorae for over 150 years. It has been proposed that the origin of these jars is a Roman shipwreck, although it has also been suggested that they could be 15th- or 16th-century Spanish olive oil jars. +Archaeologist Romeo Hristov argues that a Roman ship, or the drifting of such a shipwreck to American shores, is a possible explanation for the alleged discovery of artifacts that are apparently ancient Roman in origin (such as the Tecaxic-Calixtlahuaca bearded head) in America. Hristov claims that the possibility of such an event has been made more likely by the discovery of evidence of travels by Romans to Tenerife and Lanzarote in the Canary Islands, and of a Roman settlement (from the 1st century BCE to the 4th century CE) on Lanzarote. + +In 1950, an Italian botanist, Domenico Casella, suggested that a depiction of a pineapple (a fruit native to the New World tropics) was represented among wall paintings of Mediterranean fruits at Pompeii. According to Wilhelmina Feemster Jashemski, this interpretation has been challenged by other botanists, who identify it as a pine cone from the umbrella pine tree, which is native to the Mediterranean area. The leaves shown in the depiction (as with stone carvings from Nineveh) make the pine cone identification problematic. +Roman and other European coins have been found in the United States. Jeremiah Epstein, an American anthropologist, rejected the suggestion that these coins can be cited as evidence of Pre-Columbian contact between Europe and the Americas, pointing out the lack of any pre-Columbian archaeological contexts relating to these finds, the lack of detail concerning the discoveries, and the possibility of forgery (at least two were clearly forgeries). +A possible explanation for many of the ancient European coins found in the Americas is that they were carried over by modern ships, mixed in with solid ballast. Ships leaving European harbors would often take aboard sand and gravel dug from the shoreline in order to add weight and stability in the absence of cargo. Upon arrival at New World ports, these ships would dump the ballast and load up on trade goods. It is likely that this ballast, dug from the shores of ancient centers of commerce, contained small artifacts such as coins. + +==== Tecaxic-Calixtlahuaca head ==== \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-6.md b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-6.md new file mode 100644 index 000000000..e8909549f --- /dev/null +++ b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-6.md @@ -0,0 +1,18 @@ +--- +title: "Pre-Columbian transoceanic contact theories" +chunk: 7/11 +source: "https://en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:31.175412+00:00" +instance: "kb-cron" +--- + +A small terracotta sculpture of a head, with a beard and European-like features, was found in 1933 in the Toluca Valley, 72 kilometres (45 mi) southwest of Mexico City, in a burial offering under three intact floors of a pre-colonial building dated to between 1476 and 1510. The artifact has been studied by Roman art authority Bernard Andreae, director emeritus of the German Institute of Archaeology in Rome, Italy, and Austrian anthropologist Robert von Heine-Geldern, both of whom stated that the style of the artifact was compatible with small Roman sculptures of the 2nd century. If genuine and if not placed there after 1492 (the pottery found with it dates to between 1476 and 1510), the find provides evidence for at least a one-time contact between the Old and New Worlds. +According to Arizona State University's Michael E. Smith, a leading Mesoamerican scholar named John Paddock used to tell his classes in the years before he died that the artifact was planted as a joke by Hugo Moedano, a student who originally worked on the site. Despite speaking with individuals who knew the original discoverer (García Payón), and Moedano, Smith says he has been unable to confirm or reject this claim. Though he remains skeptical, Smith concedes he cannot rule out the possibility that the head was a genuinely buried post-Classic offering at Calixtlahuaca. + +=== 14th- and 15th-century European contact === + +Henry I Sinclair, Earl of Orkney and feudal baron of Roslin (c. 1345 – c. 1400), was a Scottish nobleman who is best known today from a modern legend which claims that he took part in explorations of Greenland and North America almost 100 years before Christopher Columbus's voyages to the Americas. In 1784, he was identified by Johann Reinhold Forster as possibly being the Prince Zichmni who is described in letters which were allegedly written around 1400 by the Zeno brothers of Venice, in which they describe a voyage which they made throughout the North Atlantic under the command of Zichmni. According to The Dictionary of Canadian Biography Online, "the Zeno affair remains one of the most preposterous and at the same time one of the most successful fabrications in the history of exploration." +Henry was the grandfather of William Sinclair, 1st Earl of Caithness, the builder of Rosslyn Chapel near Edinburgh, Scotland. The authors Robert Lomas and Christopher Knight believe some carvings in the chapel were intended to represent ears of New World corn or maize, a crop unknown in Europe at the time of the chapel's construction. Knight and Lomas view these carvings as evidence supporting the idea that Henry Sinclair traveled to the Americas well before Columbus. In their book, they discuss meeting with the wife of the botanist Adrian Dyer and state that Dyer's wife told them that Dyer agreed that the image thought to be maize was accurate. In fact, Dyer found only one identifiable plant among the botanical carvings and instead suggested that the "maize" and "aloe" were stylized wooden patterns, only coincidentally looking like real plants. Specialists in medieval architecture have variously interpreted the carvings as stylised depictions of wheat, strawberries, or lilies. +Henry Yule Oldham suggested that the Bianco world map depicted part of the coast of Brazil before 1448. This was immediately opposed by members of the Royal Geographical Society but later repeated by American and European historians. This was later refuted by Abel Fontoura da Costa, who proved that it actually depicted Santiago, the largest island of the Cape Verde archipelago. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-7.md b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-7.md new file mode 100644 index 000000000..0c9ee1fbd --- /dev/null +++ b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-7.md @@ -0,0 +1,26 @@ +--- +title: "Pre-Columbian transoceanic contact theories" +chunk: 8/11 +source: "https://en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:31.175412+00:00" +instance: "kb-cron" +--- + +Some have conjectured that Columbus was able to persuade the Catholic Monarchs of Castile and Aragon to support his planned voyage only because they were aware of some recent earlier voyage across the Atlantic. Some suggest that Columbus himself visited Canada or Greenland before 1492, because, according to Bartolomé de las Casas, he wrote he had sailed 100 leagues past an island that he called Thule in 1477. Whether Columbus actually did this and what island he visited, if any, is uncertain. Columbus is thought to have visited Bristol in 1476. Bristol was also the port from which John Cabot sailed in 1497, crewed mostly by Bristol sailors. In a letter of late 1497 or early 1498, the English merchant John Day wrote to Columbus about Cabot's discoveries, saying that land found by Cabot was "discovered in the past by the men from Bristol who found 'Brasil' as your lordship knows". There may be records of expeditions from Bristol to find the "isle of Brazil" in 1480 and 1481. Trade between Bristol and Iceland is well documented from the mid-15th century. +Gonzalo Fernández de Oviedo y Valdés records several such legends in his Historia general de las Indias of 1526, which includes biographical information on Columbus. He discusses the then-current story of a Spanish caravel that was swept off its course while on its way to England, and wound up in a foreign land populated by naked tribesmen. The crew gathered supplies and made its way back to Europe, but the trip took several months and the captain and most of the men died before reaching land. The caravel's ship pilot, a man called Alonso Sánchez, and a few others made it to Portugal, but all were very ill. Columbus was a good friend of the pilot, and took him to be treated in his own house, and the pilot described the land they had seen and marked it on a map before dying. People in Oviedo's time knew this story in several versions, though Oviedo himself regarded it as a myth. +In 1925, Soren Larsen wrote a book claiming that a joint Danish-Portuguese expedition landed in Newfoundland or Labrador in 1473 and again in 1476. Larsen claimed that Didrik Pining and Hans Pothorst served as captains, while João Vaz Corte-Real and the possibly mythical John Scolvus served as navigators, accompanied by Álvaro Martins. Nothing beyond circumstantial evidence has been found to support Larsen's claims. +The historical record shows that Basque fishermen were present in Newfoundland and Labrador from at least 1517 onward (therefore predating all recorded European settlements in the region except those of the Norse). The Basques' fishing expeditions led to significant trade and cultural exchanges with Native Americans. A fringe theory suggests that Basque sailors first arrived in North America prior to Columbus' voyages to the New World (some sources suggest the late 14th century as a tentative date) but kept the destination a secret in order to avoid competition over the fishing resources of the North American coasts. There is no historical or archaeological evidence to support this claim. + +=== Irish and Welsh legends === + +The legend of Saint Brendan, an Irish monk from what is now County Kerry, involves a fantastical journey into the Atlantic Ocean in search of Paradise in the 6th century. Since the discovery of the New World, various authors have tried to link the Brendan legend with an early discovery of America. In 1977, the voyage was successfully recreated by Tim Severin using a replica of an ancient Irish currach. +According to a British myth, Madoc was a prince from Wales who explored the Americas as early as 1170. While most scholars consider this legend to be untrue, it was used to bolster British claims in the Americas vis-à-vis those of Spain. +The "Madoc story" remained popular in later centuries, and a later development asserted that Madoc's voyagers had intermarried with local Native Americans, and that their Welsh-speaking descendants still live somewhere in the United States. These "Welsh Indians" were credited with the construction of a number of landmarks throughout the Midwestern United States, and a number of white travelers were inspired to go look for them. The "Madoc story" has been the subject of much speculation in the context of possible pre-Columbian trans-oceanic contact. No conclusive archaeological proof of such a man or his voyages has been found in the New or Old World; however, speculation abounds connecting him with certain sites, such as Devil's Backbone, located on the Ohio River at Fourteen Mile Creek near Louisville, Kentucky. +At Fort Mountain State Park in Georgia, a plaque formerly mentioned a 19th-century interpretation of the ancient stone wall that gives the site its name. The plaque repeated a claim by Tennessee governor John Sevier that Cherokees believed "a people called Welsh" had built a fort on the mountain long ago to repel Indian attacks. The plaque has been changed, leaving no reference to Madoc or the Welsh. +Biologist and controversial amateur epigrapher Barry Fell claims that Irish Ogham writing has been found carved into stones in the Virginias. Linguist David H. Kelley has criticized some of Fell's work but nonetheless argued that genuine Celtic Ogham inscriptions have in fact been discovered in America. However, others have raised serious doubts about these claims. + +== Claims of transoceanic travel originating in the New World == + +=== Claims of Egyptian coca and tobacco === \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-8.md b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-8.md new file mode 100644 index 000000000..c1f098872 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-8.md @@ -0,0 +1,21 @@ +--- +title: "Pre-Columbian transoceanic contact theories" +chunk: 9/11 +source: "https://en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:31.175412+00:00" +instance: "kb-cron" +--- + +Traces of coca and nicotine which are found in some Egyptian mummies have led to speculation that Ancient Egyptians may have had contact with the New World. The initial discovery was made by a German toxicologist Svetlana Balabanova after examining the mummy of a priestess named Henut Taui. Follow-up tests on the hair shaft, which were performed in order to rule out the possibility of contamination, revealed the same results. +A television show reported that examinations of numerous Sudanese mummies which were also undertaken by Balabanova mirrored what was found in the mummy of Henut Taui. Balabanova suggested that the tobacco may be accounted for since it may have also been known in China and Europe, as indicated by analyses run on human remains from those respective regions. Balabanova proposed that such plants native to the general area may have developed independently, but have since gone extinct. Other explanations include fraud, though curator Alfred Grimm of the Egyptian Museum in Munich disputes this. Skeptical of Balabanova's findings, Rosalie David, Keeper of Egyptology at the Manchester Museum, had similar tests performed on samples which were taken from the Manchester mummy collection and she reported that two of the tissue samples and one hair sample tested positive for the presence of nicotine. +However, mainstream scholars remain skeptical, and they do not see the results of these tests as proof of ancient contact between Africa and the Americas, especially because there could be Old World sources of cocaine and nicotine. Two attempts to replicate Balabanova's findings of cocaine failed, suggesting "that either Balabanova and her associates are misinterpreting their results or that the samples of mummies tested by them have been mysteriously exposed to cocaine". +A re-examination of the mummy of Ramesses II in the 1970s revealed the presence of fragments of tobacco leaves in its abdomen. This finding became a popular topic in fringe literature and the media and it was seen as proof of contact between Ancient Egypt and the New World. The investigator Maurice Bucaille noted that when the mummy was unwrapped in 1886 the abdomen was left open and "it was no longer possible to attach any importance to the presence inside the abdominal cavity of whatever material was found there, since the material could have come from the surrounding environment." Following the renewed discussion of tobacco sparked by Balabanova's research and its mention in a 2000 publication by Rosalie David, a study in the journal Antiquity suggested that reports of both tobacco and cocaine in mummies "ignored their post-excavation histories" and pointed out that the mummy of Ramesses II had been moved five times between 1883 and 1975. + +=== Claims of travel in Roman times === +Pomponius Mela writes, and is copied by Pliny the Elder, that Quintus Caecilius Metellus Celer (died 59 BCE), proconsul in Gaul, received "several Indians" (Indi) who had been driven by a storm to the coasts of Germania as a present from a foreign king, listed by Mela, in different manuscripts, as rege Boorum/Boiorum/Botorum and usually identified in recent scholarship as king of the Boii, though Tausend (1999) argued that it might be corrupted name of the Goths; Pliny identifies the king as the ruler of the Suebi instead: + +Ultra Caspium sinum quidnam esset, ambiguum aliquamdiu fuit, idemne Oceanus an tellus infesta frigoribus sine ambitu ac sine fine proiecta. Sed praeter physicos Homerumque qui universum orbem mari circumfusum esse dixerunt, Cornelius Nepos ut recentior, auctoritate sic certior; testem autem rei Quintum Metellum Celerem adicit, eumque ita rettulisse commemorat: cum Galliae pro consule praeesset, Indos quosdam a rege Boiorum dono sibi datos; unde in eas terras devenissent requirendo cognosse, vi tempestatium ex Indicis aequoribus abreptos, emensosque quae intererant, tandem in Germaniae litora exisse. Restat ergo pelagus, sed reliqua lateris eiusdem adsiduo gelu durantur et ideo deserta sunt. + +For a long time it was doubtful what there was beyond the Caspian bay: whether the same Ocean, or a land infested with cold, spreading out without circumference and boundless. But, in addition to the natural Philosophers and Homer, who have said that the whole universe was surrounded by sea, Cornelius Nepos, as more recent in authority and hence more certain, is available. Moreover he adds Quintus Metellus Celer as a witness to the fact, and asserts that he related this account: that while he was in charge of the Gauls as proconsul, certain Indians were given to him by a king of the Boii as a gift; and that in inquiring whence they had arrived into these regions, he learned that, driven from Indian waters by the violence of tempests, they had passed over the seas which intervened and finally had come through onto the shores of Germany. Therefore, there remains the sea, but the remaining places of this same side are held in the grip of continual cold and hence are deserted. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-9.md b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-9.md new file mode 100644 index 000000000..379e0e62a --- /dev/null +++ b/data/en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories-9.md @@ -0,0 +1,32 @@ +--- +title: "Pre-Columbian transoceanic contact theories" +chunk: 10/11 +source: "https://en.wikipedia.org/wiki/Pre-Columbian_transoceanic_contact_theories" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:31.175412+00:00" +instance: "kb-cron" +--- + +Both Mela and Pliny listed this incident as evidence supporting the notion that all lands of the world, including northern parts of Europe and Asia, are surrounded by Oceanus, and that it is theoretically possible to sail from India to Europe through a northern passage. +Since Metellus Celer died just after his consulship, before he ever got to Transalpine Gaul (in the area of present-day southern France), the authors accepting the historicity of the incident either date it to 62 BCE, when Celer was governing Cisalpine Gaul (in the area of present-day northern Italy), or interpret texts of Mela and Pliny as garbled accounts of Celer's encounter with some Indians at an earlier date, when he served as Pompey's legate in Asia. +Richard Hennig suggested that the castaways mentioned by Mela and Pliny were possibly American Indians. Other interpretations of the incident were also proposed. Bengtson (1954), McLaughlin (2016) and Lerner (2020) argued that Celer might have encountered actual merchants from India, who reached Europe from Phasis on the Black Sea coast. Other authors interpret supposed Indians as misidentified speakers of Finno-Ugric languages originating from the areas east of the Bothnian Bay or Baltic Veneti. An article in the Journal of the American Geographical Society of New York published in 1891 suggests that the word "Indos" is so indefinite as to be subject to speculation, and that copyist errors may have changed "Jernos" (Irish) or "Iberos" (Spaniards) to Indos. + +=== Icelander DNA finding === +In 2010, Sigríður Sunna Ebenesersdóttir published a genetic study showing that over 350 living Icelanders carried mitochondrial DNA of a new type, C1e, belonging to the C1 clade which was until then known only from Native American and East Asian populations. Using the deCODE genetics database, Sigríður Sunna determined that the DNA entered the Icelandic population not later than 1700, and likely several centuries earlier. However Sigríður Sunna also states that "while a Native American origin seems most likely for [this new haplogroup], an Asian or European origin cannot be ruled out". +In 2014, a study discovered a new mtDNA subclade C1f from the remains of three people found in north-western Russia and dated to 7,500 years ago. It has not been detected in modern populations. The study proposed the hypothesis that the sister C1e and C1f subclades had split early from the most recent common ancestor of the C1 clade and had evolved independently, and that subclade C1e had a northern European origin. Iceland was settled by the Vikings in the 9th century and they had raided heavily into western Russia, where the sister subclade C1f is now known to have resided. They proposed that both subclades were brought to Iceland through the Vikings, and that C1e went extinct on mainland northern Europe due to population turnover and its small representation, and subclade C1f went extinct completely. + +=== Norse legends and sagas === + +In 1009, legends report that Norse explorer Thorfinn Karlsefni abducted two children from Markland, an area on the North American mainland where Norse explorers visited but did not settle. The two children were then taken to Greenland, where they were baptized and taught to speak Norse. +In 1420, Danish geographer Claudius Clavus Swart wrote that he personally had seen "pygmies" from Greenland who were caught by Norsemen in a small skin boat. Their boat was hung in Nidaros Cathedral in Trondheim along with another, longer boat also taken from "pygmies". Clavus Swart's description fits the Inuit and two of their types of boats, the kayak and the umiak. Similarly, the Swedish clergyman Olaus Magnus wrote in 1505 that he saw in Oslo Cathedral two leather boats taken decades earlier. According to Olaus, the boats were captured from Greenland pirates by one of the Haakons, which would place the event in the 14th century. + +=== Claims of Inuit travel to the Old World === +It has been suggested that the Norse took other indigenous peoples to Europe as slaves over the following centuries, because they are known to have taken Scottish and Irish slaves. +In Ferdinand Columbus's biography of his father Christopher, he says that in 1477 his father saw in Galway, Ireland, two dead bodies which had washed ashore in their boat. The bodies and boat were of exotic appearance, and have been suggested to have been Inuit who had drifted off course. +There is also evidence of Inuit coming to Europe under their own power or as captives after 1492. In Scotland, they were known as the Finn-men. A substantial body of Greenland Inuit folklore first collected in the 19th century told of journeys by boat to Akilineq, depicted as a rich country across the ocean. + +=== Claims of Inca travel to Oceania === +Peruvian historian José Antonio del Busto Duthurburu popularized the theory that Inca ruler Topa Inca Yupanqui may have led a maritime exploration voyage across the Pacific Ocean around 1465, eventually reaching French Polynesia and Rapa Nui (Easter Island). Different Spanish chroniclers of the 16th century recount stories told to them by Inca peoples, in which Yupanqui embarked on a sea voyage, eventually reaching two islands referred to as Nina Chumpi ("fire belt") and Hawa Chumpi ("outer belt", also spelled Avachumpi, Hahua chumpi). According to the stories, Yupanqui returned from the expedition bringing back with him black-skinned people, gold, a chair made of brass, and the skin of a horse or an animal similar to a horse. Del Busto speculated the "black-skinned people" may have been Melanesians, while the animal skin may have belonged to a Polynesian wild boar that was misidentified. Critics have pointed out that Yupanqui's expedition—assuming it ever took place—could have reached the Galápagos Islands or some other part of the Americas instead of Oceania. + +== Claims based on religious traditions or symbols == \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Quantum_mind-0.md b/data/en.wikipedia.org/wiki/Quantum_mind-0.md new file mode 100644 index 000000000..c54dfe947 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Quantum_mind-0.md @@ -0,0 +1,27 @@ +--- +title: "Quantum mind" +chunk: 1/6 +source: "https://en.wikipedia.org/wiki/Quantum_mind" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:33.091099+00:00" +instance: "kb-cron" +--- + +The quantum mind or quantum consciousness is a group of hypotheses proposing that local physical laws and interactions from classical mechanics or connections between neurons alone cannot explain consciousness. These hypotheses posit instead that quantum-mechanical phenomena, such as entanglement and superposition that cause nonlocalized quantum effects, interacting in smaller features of the brain than cells, may play an important part in the brain's function and could explain critical aspects of consciousness. These scientific hypotheses are as yet unvalidated, and they can overlap with quantum mysticism. + +== History == +Eugene Wigner developed the idea that quantum mechanics has something to do with the workings of the mind. He proposed that the wave function collapses due to its interaction with consciousness. Freeman Dyson argued that "mind, as manifested by the capacity to make choices, is to some extent inherent in every electron". +Other contemporary physicists and philosophers considered these arguments unconvincing. Victor Stenger characterized quantum consciousness as a "myth" having "no scientific basis" that "should take its place along with gods, unicorns and dragons". +David Chalmers argues against quantum consciousness. He instead discusses how quantum mechanics may relate to dualistic consciousness. Chalmers is skeptical that any new physics can resolve the hard problem of consciousness. He argues that quantum theories of consciousness suffer from the same weakness as more conventional theories. Just as he argues that there is no particular reason why specific macroscopic physical features in the brain should give rise to consciousness, he also thinks that there is no specific reason why a particular quantum feature, such as the EM field in the brain, should give rise to consciousness either. + +== Approaches == + +=== Bohm and Hiley === + +David Bohm viewed quantum theory and relativity as contradictory, which implied a more fundamental level in the universe. He claimed that both quantum theory and relativity pointed to this deeper theory, a quantum field theory. This more fundamental level was proposed to represent an undivided wholeness and an implicate order, from which arises the explicate order of the universe as we experience it. +Bohm's proposed order applies both to matter and consciousness. He suggested that it could explain the relationship between them. He saw mind and matter as projections into our explicate order from the underlying implicate order. Bohm claimed that when we look at matter, we see nothing that helps us to understand consciousness. +Bohm never proposed a specific means by which his proposal could be falsified, nor a neural mechanism through which his "implicate order" could emerge in a way relevant to consciousness. He later collaborated on Karl Pribram's holonomic brain theory as a model of quantum consciousness. +David Bohm also collaborated with Basil Hiley on work that claimed mind and matter both emerge from an "implicate order". Hiley in turn worked with philosopher Paavo Pylkkänen. According to Pylkkänen, Bohm's suggestion "leads naturally to the assumption that the physical correlate of the logical thinking process is at the classically describable level of the brain, while the basic thinking process is at the quantum-theoretically describable level". + +=== Penrose and Hameroff === \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Quantum_mind-1.md b/data/en.wikipedia.org/wiki/Quantum_mind-1.md new file mode 100644 index 000000000..b1b14559b --- /dev/null +++ b/data/en.wikipedia.org/wiki/Quantum_mind-1.md @@ -0,0 +1,23 @@ +--- +title: "Quantum mind" +chunk: 2/6 +source: "https://en.wikipedia.org/wiki/Quantum_mind" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:33.091099+00:00" +instance: "kb-cron" +--- + +Theoretical physicist Roger Penrose and anaesthesiologist Stuart Hameroff collaborated to produce the theory known as "orchestrated objective reduction" (Orch-OR). Penrose and Hameroff initially developed their ideas separately and later collaborated to produce Orch-OR in the early 1990s. They reviewed and updated their theory in 2013. +Penrose's argument stemmed from Gödel's incompleteness theorems. In his first book on consciousness, The Emperor's New Mind (1989), he argued that while a formal system cannot prove its own consistency, Gödel's unprovable results are provable by human mathematicians. Penrose took this to mean that human mathematicians are not formal proof systems and not running a computable algorithm. According to Bringsjord and Xiao, this line of reasoning is based on fallacious equivocation on the meaning of computation. In the same book, Penrose wrote: "One might speculate, however, that somewhere deep in the brain, cells are to be found of single quantum sensitivity. If this proves to be the case, then quantum mechanics will be significantly involved in brain activity." +Penrose determined that wave function collapse was the only possible physical basis for a non-computable process. Dissatisfied with its randomness, he proposed a new form of wave function collapse that occurs in isolation and called it objective reduction. He suggested each quantum superposition has its own piece of spacetime curvature and that when these become separated by more than one Planck length, they become unstable and collapse. Penrose suggested that objective reduction represents neither randomness nor algorithmic processing but instead a non-computable influence in spacetime geometry from which mathematical understanding and, by later extension, consciousness derives. +Hameroff provided a hypothesis that microtubules would be suitable hosts for quantum behavior. Microtubules are composed of tubulin protein dimer subunits. The dimers each have hydrophobic pockets that are 8 nm apart and may contain delocalized π electrons. Tubulins have other smaller non-polar regions that contain π-electron-rich indole rings separated by about 2 nm. Hameroff proposed that these electrons are close enough to become entangled. He originally suggested that the tubulin-subunit electrons would form a Bose–Einstein condensate, but this was discredited. He then proposed a Frohlich condensate, a hypothetical coherent oscillation of dipolar molecules, but this too was experimentally discredited. +For instance, the proposed predominance of A-lattice microtubules, more suitable for information processing, was falsified by Kikkawa et al., who showed that all in vivo microtubules have a B lattice and a seam. Orch-OR predicted that microtubule coherence reaches the synapses through dendritic lamellar bodies (DLBs), but De Zeeuw et al. proved this impossible by showing that DLBs are micrometers away from gap junctions. +In 2014, Hameroff and Penrose claimed that the discovery of quantum vibrations in microtubules by Anirban Bandyopadhyay of the National Institute for Materials Science in Japan in March 2013 corroborates Orch-OR theory. Experiments that showed that anaesthetic drugs reduce how long microtubules can sustain suspected quantum excitations appear to support the quantum theory of consciousness. +In April 2022, the results of two related experiments at the University of Alberta and Princeton University were announced at The Science of Consciousness conference, providing further evidence to support quantum processes operating within microtubules. In a study Stuart Hameroff was part of, Jack Tuszyński of the University of Alberta demonstrated that anesthetics hasten the duration of a process called delayed luminescence, in which microtubules and tubulins re-emit trapped light. Tuszyński suspects that the phenomenon has a quantum origin, with superradiance being investigated as one possibility. In the second experiment, Gregory D. Scholes and Aarat Kalra of Princeton University used lasers to excite molecules within tubulins, causing a prolonged excitation to diffuse through microtubules further than expected, which did not occur when repeated under anesthesia. However, diffusion results have to be interpreted carefully, since even classical diffusion can be very complex due to the wide range of length scales in the fluid filled extracellular space. Nevertheless, University of Oxford quantum physicist Vlatko Vedral told that this connection with consciousness is a really long shot. +Also in 2022, a group of Italian physicists conducted several experiments that failed to provide evidence in support of a gravity-related quantum collapse model of consciousness, weakening the possibility of a quantum explanation for consciousness. +Although these theories are stated in a scientific framework, it is difficult to separate them from scientists' personal opinions. The opinions are often based on intuition or subjective ideas about the nature of consciousness. For example, Penrose wrote: + +[M]y own point of view asserts that you can't even simulate conscious activity. What's going on in conscious thinking is something you couldn't properly imitate at all by computer.... If something behaves as though it's conscious, do you say it is conscious? People argue endlessly about that. Some people would say, "Well, you've got to take the operational viewpoint; we don't know what consciousness is. How do you judge whether a person is conscious or not? Only by the way they act. You apply the same criterion to a computer or a computer-controlled robot." Other people would say, "No, you can't say it feels something merely because it behaves as though it feels something." My view is different from both those views. The robot wouldn't even behave convincingly as though it was conscious unless it really was—which I say it couldn't be, if it's entirely computationally controlled. + +Penrose continues: \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Quantum_mind-2.md b/data/en.wikipedia.org/wiki/Quantum_mind-2.md new file mode 100644 index 000000000..e1158832f --- /dev/null +++ b/data/en.wikipedia.org/wiki/Quantum_mind-2.md @@ -0,0 +1,27 @@ +--- +title: "Quantum mind" +chunk: 3/6 +source: "https://en.wikipedia.org/wiki/Quantum_mind" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:33.091099+00:00" +instance: "kb-cron" +--- + +A lot of what the brain does you could do on a computer. I'm not saying that all the brain's action is completely different from what you do on a computer. I am claiming that the actions of consciousness are something different. I'm not saying that consciousness is beyond physics, either—although I'm saying that it's beyond the physics we know now.... My claim is that there has to be something in physics that we don't yet understand, which is very important, and which is of a noncomputational character. It's not specific to our brains; it's out there, in the physical world. But it usually plays a totally insignificant role. It would have to be in the bridge between quantum and classical levels of behavior—that is, where quantum measurement comes in. + +=== Umezawa, Vitiello, Freeman === +Hiroomi Umezawa and collaborators proposed a quantum field theory of memory storage. Giuseppe Vitiello and Walter Freeman proposed a dialog model of the mind. This dialog takes place between the classical and the quantum parts of the brain. Their quantum field theory models of brain dynamics are fundamentally different from the Penrose–Hameroff theory. + +==== Quantum brain dynamics ==== +As described by Harald Atmanspacher, "Since quantum theory is the most fundamental theory of matter that is currently available, it is a legitimate question to ask whether quantum theory can help us to understand consciousness." + +The original motivation in the early 20th century for relating quantum theory to consciousness was essentially philosophical. It is fairly plausible that conscious free decisions ("free will") are problematic in a perfectly deterministic world, so quantum randomness might indeed open up novel possibilities for free will. (On the other hand, randomness is problematic for goal-directed volition!) +Ricciardi and Umezawa proposed in 1967 a general theory of quanta of long-range coherent waves within and between brain cells, and showed a possible mechanism of memory storage and retrieval in terms of Nambu–Goldstone bosons. +Mari Jibu and Kunio Yasue later popularized these results under the name "quantum brain dynamics" (QBD) as the hypothesis to explain the function of the brain within the framework of quantum field theory with implications on consciousness. + +=== Pribram === +Karl Pribram's holonomic brain theory (quantum holography) invoked quantum field theory to explain higher-order processing of memory in the brain. He argued that his holonomic model solved the binding problem. Pribram collaborated with Bohm in his work on quantum approaches to the thought process. Pribram suggested much of the processing in the brain was done in distributed fashion. He proposed that the fine fibered, felt-like dendritic fields might follow the principles of quantum field theory when storing and retrieving long term memory. + +=== Stapp === +Henry Stapp proposed that quantum waves are reduced only when they interact with consciousness. He argues from the orthodox quantum mechanics of John von Neumann that the quantum state collapses when the observer selects one among the alternative quantum possibilities as a basis for future action. The collapse, therefore, takes place in the expectation that the observer associated with the state. Stapp's work drew criticism from scientists such as David Bourget and Danko Georgiev. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Quantum_mind-3.md b/data/en.wikipedia.org/wiki/Quantum_mind-3.md new file mode 100644 index 000000000..94817f860 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Quantum_mind-3.md @@ -0,0 +1,19 @@ +--- +title: "Quantum mind" +chunk: 4/6 +source: "https://en.wikipedia.org/wiki/Quantum_mind" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:33.091099+00:00" +instance: "kb-cron" +--- + +=== Catecholaminergic neuron electron transport (CNET) === +CNET is a hypothesized neural signaling mechanism in catecholaminergic neurons that would use quantum mechanical electron transport. The hypothesis is based in part on the observation by many independent researchers that electron tunneling occurs in ferritin, an iron storage protein that is prevalent in those neurons, at room temperature and ambient conditions. The hypothesized function of this mechanism is to assist in action selection, but the mechanism itself would be capable of integrating millions of cognitive and sensory neural signals using a physical mechanism associated with strong electron-electron interactions. Each tunneling event would involve a collapse of an electron wave function, but the collapse would be incidental to the physical effect created by strong electron-electron interactions. +CNET predicted a number of physical properties of these neurons that have been subsequently observed experimentally, such as electron tunneling in substantia nigra pars compacta (SNc) tissue and the presence of disordered arrays of ferritin in SNc tissue. The hypothesis also predicted that disordered ferritin arrays like those found in SNc tissue should be capable of supporting long-range electron transport and providing a switching or routing function, both of which have also been subsequently observed. +Another prediction of CNET was that the largest SNc neurons should mediate action selection. This prediction was contrary to earlier proposals about the function of those neurons at that time, which were based on predictive reward dopamine signaling. A team led by Dr. Pascal Kaeser of Harvard Medical School subsequently demonstrated that those neurons do in fact code movement, consistent with the earlier predictions of CNET. While the CNET mechanism has not yet been directly observed, it may be possible to do so using quantum dot fluorophores tagged to ferritin or other methods for detecting electron tunneling. +CNET is applicable to a number of different consciousness models as a binding or action selection mechanism, such as Integrated Information Theory (IIT) and Sensorimotor Theory (SMT). It is noted that many existing models of consciousness fail to specifically address action selection or binding. For example, O'Regan and Noë call binding a "pseudo problem," but also state that "the fact that object attributes seem perceptually to be part of a single object does not require them to be 'represented' in any unified kind of way, for example, at a single location in the brain, or by a single process. They may be so represented, but there is no logical necessity for this." Simply because there is no "logical necessity" for a physical phenomenon does not mean that it does not exist, or that once it is identified that it can be ignored. Likewise, global workspace theory (GWT) models appear to treat dopamine as modulatory, based on the prior understanding of those neurons from predictive reward dopamine signaling research, but GWT models could be adapted to include modeling of moment-by-moment activity in the striatum to mediate action selection, as observed by Kaiser. CNET is applicable to those neurons as a selection mechanism for that function, as otherwise that function could result in seizures from simultaneous actuation of competing sets of neurons. While CNET by itself is not a model of consciousness, it is able to integrate different models of consciousness through neural binding and action selection. However, a more complete understanding of how CNET might relate to consciousness would require a better understanding of strong electron-electron interactions in ferritin arrays, which implicates the many-body problem. + +== Criticism == +These hypotheses of the quantum mind remain hypothetical speculation, as Penrose admits in his discussions. Until they make a prediction that is tested by experimentation, the hypotheses are not based on empirical evidence. In 2010, Lawrence Krauss was guarded in criticising Penrose's ideas. He said: "Roger Penrose has given lots of new-age crackpots ammunition... Many people are dubious that Penrose's suggestions are reasonable, because the brain is not an isolated quantum-mechanical system. To some extent it could be, because memories are stored at the molecular level, and at a molecular level quantum mechanics is significant." According to Krauss, "It is true that quantum mechanics is extremely strange, and on extremely small scales for short times, all sorts of weird things happen. And in fact, we can make weird quantum phenomena happen. But what quantum mechanics doesn't change about the universe is, if you want to change things, you still have to do something. You can't change the world by thinking about it." +The process of testing the hypotheses with experiments is fraught with conceptual/theoretical, practical, and ethical problems. \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Quantum_mind-4.md b/data/en.wikipedia.org/wiki/Quantum_mind-4.md new file mode 100644 index 000000000..501934764 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Quantum_mind-4.md @@ -0,0 +1,19 @@ +--- +title: "Quantum mind" +chunk: 5/6 +source: "https://en.wikipedia.org/wiki/Quantum_mind" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:33.091099+00:00" +instance: "kb-cron" +--- + +=== Conceptual problems === +The idea that a quantum effect is necessary for consciousness to function is still in the realm of philosophy. Penrose proposes that it is necessary, but other theories of consciousness do not indicate that it is needed. For example, Daniel Dennett proposed a theory called multiple drafts model, which doesn't indicate that quantum effects are needed, in his 1991 book Consciousness Explained. A philosophical argument on either side is not a scientific proof, although philosophical analysis can indicate key differences in the types of models and show what type of experimental differences might be observed. But since there is no clear consensus among philosophers, there is no conceptual support that a quantum mind theory is needed. +A possible conceptual approach is to use quantum mechanics as an analogy to understand a different field of study like consciousness, without expecting that the laws of quantum physics will apply. An example of this approach is the idea of Schrödinger's cat. Erwin Schrödinger described how one could, in principle, create entanglement of a large-scale system by making it dependent on an elementary particle in a superposition. He proposed a scenario with a cat in a locked steel chamber, wherein the cat's survival depended on the state of a radioactive atom—whether it had decayed and emitted radiation. According to Schrödinger, the Copenhagen interpretation implies that the cat is both alive and dead until the state has been observed. Schrödinger did not wish to promote the idea of dead-and-alive cats as a serious possibility; he intended the example to illustrate the absurdity of the existing view of quantum mechanics. But since Schrödinger's time, physicists have given other interpretations of the mathematics of quantum mechanics, some of which regard the "alive and dead" cat superposition as quite real. Schrödinger's famous thought experiment poses the question of when a system stops existing as a quantum superposition of states. In the same way, one can ask whether the act of making a decision is analogous to having a superposition of states of two decision outcomes, so that making a decision means "opening the box" to reduce the brain from a combination of states to one state. This analogy of decision-making uses a formalism derived from quantum mechanics, but does not indicate the actual mechanism by which the decision is made. +In this way, the idea is similar to quantum cognition. This field clearly distinguishes itself from the quantum mind, as it is not reliant on the hypothesis that there is something micro-physical quantum-mechanical about the brain. Quantum cognition is based on the quantum-like paradigm, generalized quantum paradigm, or quantum structure paradigm that information processing by complex systems such as the brain can be mathematically described in the framework of quantum information and quantum probability theory. This model uses quantum mechanics only as an analogy and does not propose that quantum mechanics is the physical mechanism by which it operates. For example, quantum cognition proposes that some decisions can be analyzed as if there is interference between two alternatives, but it is not a physical quantum interference effect. + +=== Practical problems === +The main theoretical argument against the quantum-mind hypothesis is the assertion that quantum states in the brain would lose coherency before they reached a scale where they could be useful for neural processing. This supposition was elaborated by Max Tegmark. His calculations indicate that quantum systems in the brain decohere at sub-picosecond timescales. No response by a brain has shown computational results or reactions on this fast of a timescale. Typical reactions are on the order of milliseconds, trillions of times longer than sub-picosecond timescales. +Daniel Dennett uses an experimental result in support of his multiple drafts model of an optical illusion that happens on a timescale of less than a second or so. In this experiment, two different-colored lights, with an angular separation of a few degrees at the eye, are flashed in succession. If the interval between the flashes is less than a second or so, the first light that is flashed appears to move across to the position of the second light. Furthermore, the light seems to change color as it moves across the visual field. A green light will appear to turn red as it seems to move across to the position of a red light. Dennett asks how we could see the light change color before the second light is observed. Velmans argues that the cutaneous rabbit illusion, another illusion that happens in about a second, demonstrates that there is a delay while modelling occurs in the brain and that this delay was discovered by Libet. These slow illusions that happen at times of less than a second do not support a proposal that the brain functions on the picosecond timescale. +Penrose says: \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Quantum_mind-5.md b/data/en.wikipedia.org/wiki/Quantum_mind-5.md new file mode 100644 index 000000000..0ffe5aacc --- /dev/null +++ b/data/en.wikipedia.org/wiki/Quantum_mind-5.md @@ -0,0 +1,35 @@ +--- +title: "Quantum mind" +chunk: 6/6 +source: "https://en.wikipedia.org/wiki/Quantum_mind" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:33.091099+00:00" +instance: "kb-cron" +--- + +The problem with trying to use quantum mechanics in the action of the brain is that if it were a matter of quantum nerve signals, these nerve signals would disturb the rest of the material in the brain, to the extent that the quantum coherence would get lost very quickly. You couldn't even attempt to build a quantum computer out of ordinary nerve signals, because they're just too big and in an environment that's too disorganized. Ordinary nerve signals have to be treated classically. But if you go down to the level of the microtubules, then there's an extremely good chance that you can get quantum-level activity inside them. +For my picture, I need this quantum-level activity in the microtubules; the activity has to be a large-scale thing that goes not just from one microtubule to the next but from one nerve cell to the next, across large areas of the brain. We need some kind of coherent activity of a quantum nature which is weakly coupled to the computational activity that Hameroff argues is taking place along the microtubules. +There are various avenues of attack. One is directly on the physics, on quantum theory, and there are certain experiments that people are beginning to perform, and various schemes for a modification of quantum mechanics. I don't think the experiments are sensitive enough yet to test many of these specific ideas. One could imagine experiments that might test these things, but they'd be very hard to perform. + +Penrose also said in an interview: + +...whatever consciousness is, it must be beyond computable physics.... It's not that consciousness depends on quantum mechanics, it's that it depends on where our current theories of quantum mechanics go wrong. It's to do with a theory that we don't know yet. + +A demonstration of a quantum effect in the brain has to explain this problem or explain why it is not relevant, or that the brain somehow circumvents the problem of the loss of quantum coherency at body temperature. As Penrose proposes, it may require a new type of physical theory, something "we don't know yet." + +=== Ethical problems === +Deepak Chopra has referred a "quantum soul" existing "apart from the body", human "access to a field of infinite possibilities", and other quantum mysticism topics such as quantum healing or quantum effects of consciousness. Seeing the human body as being undergirded by a "quantum-mechanical body" composed not of matter but of energy and information, he believes that "human aging is fluid and changeable; it can speed up, slow down, stop for a time, and even reverse itself", as determined by one's state of mind. Robert Carroll states that Chopra attempts to integrate Ayurveda with quantum mechanics to justify his teachings. Chopra argues that what he calls "quantum healing" cures any manner of ailments, including cancer, through effects that he claims are based on the same principles as quantum mechanics. This has led physicists to object to his use of the term quantum in reference to medical conditions and the human body. Chopra said: "I think quantum theory has a lot of things to say about the observer effect, about non-locality, about correlations. So I think there's a school of physicists who believe that consciousness has to be equated, or at least brought into the equation, in understanding quantum mechanics." On the other hand, he also claims that quantum effects are "just a metaphor. Just like an electron or a photon is an indivisible unit of information and energy, a thought is an indivisible unit of consciousness." In his book Quantum Healing, Chopra stated the conclusion that quantum entanglement links everything in the Universe, and therefore it must create consciousness. +According to Daniel Dennett, "On this topic, Everybody's an expert... but they think that they have a particular personal authority about the nature of their own conscious experiences that can trump any hypothesis they find unacceptable." +While quantum effects are significant in the physiology of the brain, critics of quantum mind hypotheses challenge whether the effects of known or speculated quantum phenomena in biology scale up to have significance in neuronal computation, much less the emergence of consciousness as phenomenon. Daniel Dennett said, "Quantum effects are there in your car, your watch, and your computer. But most things—most macroscopic objects—are, as it were, oblivious to quantum effects. They don't amplify them; they don't hinge on them." + +== See also == + +== References == + +== Further reading == + +== External links == +Center for Consciousness Studies, directed by Stuart Hameroff +PhilPapers on Philosophy of Mind, edited by David Bourget and David Chalmers +Quantum Approaches to Consciousness, entry in Stanford Encyclopedia of Philosophy \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Ruggero_Santilli-0.md b/data/en.wikipedia.org/wiki/Ruggero_Santilli-0.md new file mode 100644 index 000000000..82e589d96 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Ruggero_Santilli-0.md @@ -0,0 +1,26 @@ +--- +title: "Ruggero Santilli" +chunk: 1/2 +source: "https://en.wikipedia.org/wiki/Ruggero_Santilli" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:34.215660+00:00" +instance: "kb-cron" +--- + +Ruggero Maria Santilli (born September 8, 1935) is an Italo-American nuclear physicist. Mainstream scientists dismiss his theories as fringe science. + +== Biography == +Ruggero Maria Santilli was born September 8, 1935) in Capracotta. He studied physics at the University of Naples and earned his PhD in physics from the University of Turin, graduating in 1965. He held various academic positions in Italy until 1967, when he took a position at University of Miami; a year later he moved to Boston University, and subsequently held visiting scientist positions at Massachusetts Institute of Technology and Harvard University. +In September 1981, Santilli established a one-man organization, the Institute for Basic Research in Boston; he told a reporter from St. Petersburg Times in 2007 that he left Harvard because scientists there viewed his work as "heresy". +In 1982 Austrian-British philosopher Karl Popper wrote that Santilli's calls for tests on the validity of quantum mechanics within nuclear and hadronic structures, represented a return to scientific sanity. +In 1985 he published a book, Il Grande Grido: Ethical Probe on Einstein's Followers in the U.S.A, an Insider's View, in which he said that in many institutions there is an effective conspiracy to suppress or not investigate novel theories which may conflict with established scientific theories, such as Einstein's theory of relativity. According to Santilli, institutions receive funding and have established entire departments dedicated to long established theories, and so he argues that these same institutions are ill-equipped to challenge their own scientific paradigms with new theories. Santilli claimed that a number of scientists, including Nobel Laureates Sheldon Glashow and Steven Weinberg, conspired to stop him from conducting research which might have led to the inapplicability of part of Einstein's theory of relativity while he was at Harvard. He has complained that papers he has submitted to peer-reviewed American Physical Society journals were rejected because they were controlled by a group of Jewish physicists led by Weinberg. Santilli has filed a number of lawsuits alleging the suppression of his scientific ideas, including a lawsuit against the magazine Infinite Energy. +Santilli worked on new mathematics and new understandings of physics, to address what he saw as unsolved problems in quantum chemistry; he has published papers and books describing new chemical species called "magnecules" that he says are explained by his mathematics and theories. He told the reporter from St. Petersburg Times that the scientific establishment has not accepted this work. +Around 1990 he moved with the institute back to Florida. +In Florida he worked as a consultant and started companies to support the development and commercialization of his work. In 1990 his publishing company, Hadronic Press, Inc, was registered in Florida under the names of Santilli and his wife. It publishes two journals, Hadronic Journal and Algebras, Groups and Geometries, as well as proceedings, monographs, and textbooks. +Santilli consulted for a company called EarthFirst from 1998 to 2001, and after the relationship ended he sent letters to several of EarthFirst's clients saying they were infringing patents he owned on MagneGas. This led to five years of litigation. In 2007 he founded MagneGas Corporation which went public through a reverse merger in early 2008; the reconstituted company acquired a license to Santilli's inventions in the territory of the western hemisphere from a company called Hyfuels, Inc. of which Santilli was the CEO, and later that year directly acquired other patents and trademarks related to MagneGas from Santilli. According to MagneGas' annual report for the financial year ending December 31, 2017, Santilli's son, Ermanno, was the President and CEO, and due to their holdings of preferred stock, "the Santilli Family has the ability to significantly influence all matters requiring approval by stockholders of our company." His wife Carla is a director. Their daughter and Ermanno's sister, Luisa Ingargiola, is a director and was formerly the CFO. Ruggero had no executive or director role, but the licenses with Hyfuels remain in place and he "personally contributed a small refinery" for the company's use. +As of Nov 2nd, 2018, Carla Santilli and Luisa Ingargiola had both resigned from their roles as directors with the company and Ermanno Santilli had stepped down as CEO. +After an explosion at its facility in 2016, the company changed its raw material from organic waste to soybean oil. As of 2018, the company was not profitable; it had revenue from selling its gas to metalworking companies as an alternative to acetylene, and aspired to compete more broadly with natural gas. As of 2018 two people had been killed and one person injured by MagneGas canisters; as of July 2018 the company was under investigation by OSHA as well as the US gas transport regulator. +In 2013, Santilli became involved with another publicly traded company called Thunder Fusion Corporation, formed when a publicly traded shell company acquired intellectual property generated by Santilli around fusion power that had been owned by Hyfuels. The company changed its name to Thunder Energies Corporation in 2014. Thunder Energies said that it developed a telescope that could detect galaxies, asteroids and other objects in space that were made of antimatter, and in early 2016 Santilli announced that the company had taken pictures of otherwise invisible antimatter objects on Earth. Santilli claimed he was able to use the telescope—a standard, commercial telescope re-fitted with concave lenses, to view antimatter galaxies and images that he interpreted as invisible beings. He planned to sell the telescopes to amateur astronomers in America. +In 2016, Santilli sued Dutch mathematician and skeptic Pepijn van Erp, his webhost, and the chairman of Skepsis Foundation over blog postings in which van Erp had criticized Santelli's work as pseudoscience and ridiculous. The suit against the foundation's chairman was dismissed in August 2018 and shortly thereafter the suit against van Erp was settled. +In 2017 an article in Perspectives on Science described Santilli's Institute for Basic Research as follows: "The substance of the IBR's program is more directed at a Kuhnian rather than an institutional revolution but the readiness with which its supporters endorse the idea of a Jewish conspiracy could class it as having revolutionary intent and being norm violating. Its strong leadership style suggests pathological individualism and an emphasis on opposition to mainstream science." It also noted, describing tendencies of advocates for fringe science: "...there is a surprising readiness to discuss the possibility that the resistance of the mainstream to fringe ideas is the consequence of mainstream cabals, particularly, a Jewish conspiracy. The website scientificethics.org, makes allegations of Jewish corruption and scientific gangsterism as a cause of the 'persecut[ion] of the Italian American scientist R. M. Santilli,' leading to the suppression of unorthodox scientific ideas, particularly those that conflict with 'organized Jewish interests on Einstein.'" \ No newline at end of file diff --git a/data/en.wikipedia.org/wiki/Ruggero_Santilli-1.md b/data/en.wikipedia.org/wiki/Ruggero_Santilli-1.md new file mode 100644 index 000000000..a4f746fc2 --- /dev/null +++ b/data/en.wikipedia.org/wiki/Ruggero_Santilli-1.md @@ -0,0 +1,23 @@ +--- +title: "Ruggero Santilli" +chunk: 2/2 +source: "https://en.wikipedia.org/wiki/Ruggero_Santilli" +category: "reference" +tags: "science, encyclopedia" +date_saved: "2026-05-05T03:09:34.215660+00:00" +instance: "kb-cron" +--- + +== Selected publications == +Santilli, Ruggero (1978). Foundations of Theoretical Mechanics: The inverse problem in Newtonian mechanics (PDF). New York: Springer-Verlag. OCLC 9020170. +Santilli, Ruggero (1983). Foundations of Theoretical Mechanics: Birkhoffian Generalization of Hamiltonian Mechanics (PDF). Berlin: Springer-Verlag. ISBN 978-0-387-09482-3. +Santilli, Ruggero (1984). Il Grande Grido: Ethical Probe on Einstein's Followers in the U.S.A.: An Insider's View. Louisville: Alpha Pub. ISBN 978-0-931753-00-8. +Santilli, Ruggero Maria (1997). "Relativistic hadronic mechanics: Nonunitary, axiom-preserving completion of relativistic quantum mechanics". Foundations of Physics. 27 (5): 625–729. Bibcode:1997FoPh...27..625S. doi:10.1007/BF02550172. S2CID 121113126. +Santilli, Ruggero (2001). Foundations of Hadronic Chemistry: with Applications to New Clean Energies and Fuels. Berlin: Springer. ISBN 978-1-4020-0087-4. +Santilli, R. M.; Aringazin, A. K. (2004). "Structure and Combustion of Magnegases". Hadronic Journal. 27 (2004): 299–330. arXiv:physics/0112066. Bibcode:2001physics..12066S. +Santilli, Ruggero (2006). Isodual Theory of Antimatter with Applications to Antigravity, Grand Unification and Cosmology (PDF). Fundamental Theories of Physics. Vol. 151. Springer. Bibcode:2006itaa.book.....S. doi:10.1007/1-4020-4518-2 (inactive 31 July 2025). ISBN 1-4020-4518-2.{{cite book}}: CS1 maint: DOI inactive as of July 2025 (link) + +== References == + +== External links == +"Video:From trash to gas". CNN. September 22, 2010. \ No newline at end of file