The other subgroup moved south as the ice retreated, eventually spreading through North America and into South America with the rapid geographic expansion that the archaeological and genetic evidence documents.

What happened to the Ancient Beringian lineage — why USR1’s specific genetic profile is not clearly recognizable in modern populations — is one of the most interesting questions the discovery raised.

Beringia As Homeland, Not Just Highway

Much of the popular understanding of Beringia treats it as a transit zone — a land bridge that people crossed in order to reach the Americas.

This framing is geographically and intellectually limiting, because it treats the land connection itself as empty or unimportant except as a path between two more significant places.