this initial migration of the ancestors of all present-day native americans happened no earlier than 23,000 years ago, the team says, and this represents the split date of native americans from east asian and siberian populations. it also confirms that the ancestors of all native americas arrived into the new world as part of the same migration. the researchers add that it is likely that after diverging from old world populations around 23,000 years ago, the ancestral native americans remained isolated in beringia (siberia and east asia) for about another 8,000 years, given that the earliest archaeological evidence for humans in the americas is around 15,000 years ago. the genetic evidence shows that the first native americans came from one population that arrived around 15,000 to 16,000 years ago and then split into two different branches around 13,000 years ago, waters explains.
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