The Ancient Beringians were not lost.

They were simply unsampled until USR1’s genome was analyzed.

They were not a separate population that preceded the first Americans — they were part of the founding population of the Americas, which is the same thing as the first Americans.

They were not forgotten, because they were never remembered: they lived and died before any written historical record, before any oral tradition that has been transmitted to the present in an identifiable form.

They were a branch of the founding population — a branch that diverged early, that maintained its distinctiveness for thousands of years, and that was eventually absorbed into or replaced by other populations as the demographic patterns of the early Americas continued to evolve.