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Intrigued, Dr. Willerslev decided to contact living Aboriginals to see if they would participate in a new genetic study. He joined David W. Lambert, a geneticist at Griffith University in Australia, who was already meeting with Aboriginal communities about participating in this kind of research. In collaboration with scientists at the University of Oxford, the researchers also obtained DNA from people in Papua New Guinea. All told, the team was able to sequence 83 genomes from Aboriginal Australians and 25 from people in Papua New Guinea, all with far greater accuracy than in Dr. Willerslev’s 2011 study. Meanwhile, Mait Metspalu of the Estonian Biocentre was leading a team of 98 scientists on another genome-gathering project. They picked out 148 populations to sample, mostly in Europe and Asia, with a few genomes from Africa and Australia. They, too, sequenced 483 genomes at high resolution. David Reich, a geneticist at Harvard Medical School, and his colleagues assembled a third database of genomes from all six inhabited continents.
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