With heavy continental glaciation (ice age), the sea levels would have been lower by as much as 300 ft. There is likely a wealth of fossil and archaeological material offshore.
Yep. Bet there’s a lot of neat stuff under the waters of the Bearing strait.
Most of the time (as the article sez) commonly given as the period of human origin, the continental shelves were exposed and the interior highlands covered in glaciers. So most evidence is probably down there, including (IMHO of course) submerged settlements, villages, towns, cities, etc.