A child with Ancient Beringian ancestry at approximately 9,000 years — 2,500 years after USR1 — was evidence that this population branch had not quickly disappeared from Alaska after the initial founding period.

It had persisted.

Ancient Beringian people were living in northwestern Alaska, on the Seward Peninsula, thousands of years into the Holocene.

This persistence had implications for how researchers modeled the early human population history of Alaska and Beringia.

The picture was not one of a brief episode of Ancient Beringian presence at the beginning of the record, followed by complete replacement.

It was one of a population branch that maintained itself — in at least parts of Alaska — across multiple millennia.