Ancient Skeletons In Brazil Carried A Genetic Signal Scientists Did Not Expect — And It Complicated The Story Of The First Americans
They do not explain each other.
The Population Y signal, which appears in populations from the interior of South America as well as from the Pacific coast, and which involves affinities to Australian and Andamanese populations rather than to Polynesian populations, cannot be explained by the Polynesian contact event.
Keeping these two distinct phenomena clear is important for the accurate communication of the science.
The Polynesian contact is documented and established.
The Population Y signal is documented and its explanation is debated.
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