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Max Planck, Harvard and Sao Paulo researchers deny their DNA models are suspect
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[QUOTE]Originally posted by Tukuler: [QB] https://www.sciencemag.org/news/2018/11/ancient-dna-confirms-native-americans-deep-roots-north-and-south-america [QUOTE]excerpts [caption The Suruí from the Brazilian Amazon carry traces of Australasian ancestry, now confirmed to have arrived in South America more than 10,400 years ago. Craig Stennett/Alamy Stock Photo ] . . . . the data decisively dispel suggestions, based on the distinctive skull shape of a few ancient remains, that early populations had a different ancestry from today's Native Americans. "Native Americans truly did originate in the Americas, as a genetically and culturally distinctive group. They are absolutely indigenous to this continent," Raff says. [IMG]https://science.sciencemag.org/content/sci/362/6415/627/F1.large.jpg[/IMG] (MAP) C. POSTH ET AL., CELL, 175 (2018) ADAPTED BY J. YOU/SCIENCE; (DATA) J. MORENO-MAYAR ET AL., SCIENCE 10.1126/SCIENCE.AAV2621 . . . . Just as mysterious is the trace of Australasian ancestry in some ancient South Americans. Reich and others had previously seen hints of it in living people in the Brazilian Amazon. Now, Willerslev has provided more evidence: telltale DNA in one person from Lagoa Santa in Brazil, who lived 10,400 years ago. "How did it get there? We have no idea," says geneticist José Víctor Moreno-Mayar of the University of Copenhagen, first author of the Willerslev paper. The signal doesn't appear in any other of the team's samples, "somehow leaping over all of North America in a single bound," says co-author and archaeologist David Meltzer of Southern Methodist University in Dallas, Texas. He wonders whether that Australasian ancestry was confined to a small population of Siberian migrants who remained isolated from other Native American ancestors throughout the journey through Beringia and the Americas. That suggests individual groups may have moved into the continents without mixing. [/QUOTE] [/QB][/QUOTE]
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