In 1990 a tiny tribe of Native Americans donated some blood samples to researchers at Arizona State University, to try and understand their soaring rates of diabetes.
The controversy that followed went on to shape Native American DNA research and modern bioethics.
In 2003 one of the tribe, the Havasupai, attended a doctoral presentation, and discovered that their previously donated blood had been used for purposes other than diabetes research.
All hell broke loose. A university investigation uncovered about 12 papers that had used the blood research data in some way over the last 10 years.
Two particularly egregious studies involved analysing the Havasupai blood for markers of schizophrenia, and claiming that their genetics proved the tribe migrated from elsewhere, contrary to their beliefs.
The tribe sued ASU and the lead geneticist, Dr Teri Markow. It's hard to know how many claims were filed and pursued, how many courts, private investigators and committees were involved, but the line was clear - the Havasupai did not consent to research beyond diabetes.
The outcome was a financial settlement, and the right for the Havasupai to reclaim their samples, which they did, with great solemnity and ritual.
The media ran multiple gleeful stories: the Phoenix New Times led with “Indian Givers, The Havasupai trusted the white man to help with a diabetes epidemic. Instead, ASU tricked them into bleeding for academia.” The narrative was too perfect to let up.
The story has entered the textbooks as a classic example of postcolonial exploitation, bioethical injustice and inequality.
The only trouble is - how much of this story is true?
In 2013 a piece appeared on PLOS blog entitled 'Is the Havasupai Indian Case a Fairy Tale?'
In it the author defends Markow, detailing how many of the claims against her are based on flimsy to non-existent evidence.
The first paper based on the blood samples back in 1993 had looked for variation in HLA genes across the group, as a way of producing some early evidence for genetic susceptibility to diabetes. Was this the evidence for research into schizophrenia?
Rather than ignoring diabetes, which was a central claim of the Havasupai, the infamous 2003 doctoral presentation was a look at DNA microsatellites and how they could reveal associations with diabetes. But an irate anthropologist had decided this was not acceptable.
Far from secretly studying schizophrenia, Markow claimed that she had denied permission for a student to use the samples for exactly that.
The Havasupai and other academics believed that Markow had been lying from the very beginning, that the original diabetes study in 1990 was a cover for schizophrenia research.
Well, was it? That 1993 paper was part funded by a grant from the National Alliance for Research on Schizophrenia and Depression.
The exact details of the grant appear to have been lost to time, or misplaced? Markow's defenders say grants are fairly flexible, her detractors point to letters of intention, letters which mention schizophrenia research on the Havasupai.
The controversy hasn't stopped Markow from pursuing a distinguished career, and few people are interested in digging up the details again. We'll likely never know the whole story...
What is clear is that the case has impacted early genetic studies involving Native Americans, which is a huge shame since modern genomics holds so much potential for health, fertility and longevity.
• • •
Missing some Tweet in this thread? You can try to
force a refresh
Around AD 1500 this six month old child was buried under a pile of flat stones and sealskins, in the shadow of a large cliff at Qilakitsoq, Greenland. Centuries later experts determined he was likely buried alive, on the body of his mother 🧵
Qilakitsoq is in eastern Greenland, and was occupied by the Thule Inuit, who arrived circa AD 1250. They pushed out the original Dorset Culture people, and named the site Qilakitsoq, meaning 'that which has little sky', a reference to the high cliffs.
In 1972 a pair of brothers out grouse hunting stumbled upon a burial site in the cliffs.
Somewhere between 500-800 million people rely on cassava root as their main source of carbohydrate. Incredibly it looks like many of them suffer from chronic cyanide poisoning as a result of improper preparation
The quantity of cyanide depends on the cultivar, growing conditions and differences between the root and leaves of the tuber. The amount ranges from 15-1000mg cyanide per kilo of root.
Turning raw cassava root into a safe and edible food requires careful processing to reduce the cyanogenic glycosides. A combination of crushing/fermenting, plus drying seems best - some simple methods like boiling do very little to detoxify the root.
A thread on the Pacific Dwarf mythology that accompanied the Austronesian expansion - the Primordial Little People Type-Tale
The dominant hypothesis as to why many Austronesian-Polynesian cultures have a foundational little-people story, is that when the proto-Austronesians arrived in Taiwan they found a short statured Palaeolithic people already living there.
This theory was recently strengthened by the discovery of 'negrito-like' human remains in Taiwan, dating back around 6000 years. The skull shows many similarities to other Negrito and African San peoples.
In 2016 the British Dental Journal identified a new child protection issue - the sub Saharan practice of gouging out the healthy tooth buds of children, euphemistically called 'Infant Oral Mutilation' (IOM) 🧵
IOM is the practice of removing erupting infant teeth in order to prevent ill physical and spiritual health - the buds are believed to be tooth worms or bad spirits which cause diarrhea and fevers. The cure is to remove the primary teeth.
The teeth are extracted in an extremely crude and painful manner, using bike spokes, penknives, hot nails, fingernails, razor blades etc, without anaesthetic and with the high risk of blood loss and subsequent infection, including passing on HIV or hepatitis B.
Thread of pictures from Australia, taken from the book Peoples Of All Nations (1922) Vol I.
The British authors survey both the European and Aboriginal inhabitants, considering the former to be a "sub-type of the British race... far more assertive, self-confident, ruthless"
"The Sturdy Stock They Raise On Australian Farms" - the authors mention the low birth rate in the cities, but praise the outdoor Australian lifestyle, as well as pointing to new technologies replacing older rural livelihoods.
Next up from the Peoples Of All Nations Vol I (1922), we have Annam.
Described as a 'long stretch of tropic seaboard, inland mountains and jungles' with a 'medley of races' - the Mongolian Annamese, Chinese traders, Malay Chams and jungle 'Moi savages'.