Study also reveals some groups in South America own closer genetic ties to indigenous peoples of Australia,New Guinea and the Andaman Islands than to present-day Native AmericansNative American ancestors reached the new world in a single, initial migration from Siberia at most 23000 years ago, and only later differentiating into today’s distinct groups,DNA research revealed Tuesday.
Most scientists agree the Americas were peopled by forefathers who crossed the Bering land and ice bridge which connected contemporary-day Russia and Alaska in Earth’s final glacial period.
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Source: theguardian.com