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‘Ghost population’ hints at long-lost migration to the Americas

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Present-day Amazonians share an unexpected genetic link with Asian islanders, hinting at an ancient trek.

A mysterious group of humans crossed the Bering land bridge from Siberia into the Americas thousands of years ago, genetic analyses reveal. Modern-day signatures of this ‘ghost population’ survive in people who live deep in the Brazilian Amazon, but the two research teams who have made the discovery have different ideas about when and how these migrants reached the Americas1, 2.

"This is an unexpected finding," says Jennifer Raff, an anthropological geneticist at the University of Texas at Austin who was not involved in either study. "It’s honestly one of the most exciting results we’ve seen in a while."

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http://www.nature.com/news/ghost-population-hints-at-long-lost-migration-to-the-americas-1.18029

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