Ancient DNA from sites like Yana provides a different kind of window.

The genome of the Yana children does not tell us what was happening in the center of Beringia.

But it tells us what kinds of populations were present in the western margins of the region — the kinds of people whose descendants, in various admixed forms, might eventually have been part of the Beringian community that gave rise to the first Americans.

The Deeper Implications — Reconstructing A Crowded Pleistocene