At West Hunter, Greg Cochran mentions one of the weirder recent findings in race genomics: some Amerindians, from roughly Panama to Brazil have a moderate amount of ancestry that is most similar to that of the pygmy negritos of the Andaman Islands in the Indian Ocean:
One very important point, naturally mentioned in none of the press accounts, is is what they didn’t see: the Alaskan kid didn’t have any of the Australo-Melanesian, Andamanese-like component that exists in Amazonian Indians today.
The Andamanese appear representative of an early wave of anatomically modern humans that settled the coastline of the Indian Ocean, getting to New Guinea and Australia. This early wave may even have gone up the coast of East Asia.
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