This is not a random cave on a random coastline.

It is a specific location at the easternmost margin of the Beringian world — the edge of the landscape where the ancestral Native American population lived before it dispersed southward, and a place where people evidently continued to live after that dispersal had begun.

As sea levels rose after the Last Glacial Maximum — as the glaciers melted and the water they had locked up returned to the oceans — the Beringian landmass gradually submerged.

The connection between Asia and North America was severed.