The climate 25,000 years ago was cold, very cold. It was the height of the last ice age, and survival required desperate measures — especially from those in Eurasia, where food and wood fuel ran low. Some chose to migrate, but distances and directions among groups varied.

One faction ended up on the now-submerged Bering land bridge, a place where they would live in isolation for 10,000 years. They were the first Native Americans, according to a recent column in the journal Science.

Using genetic and pale ecological evidence, University of Utah anthropological geneticist Dennis O’Rourke, University of Colorado archaeologist John and University of London pale ecologist Scott Elias were able to bolster a long-standing theory known as the “Bering an Standstill.”

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