By floating on a raft of downed trees and broken branches, according to a study published Monday in the journal PNAS. The ...

Some may have come through the back door. And even the first Americans (named by an Italian) likely migrated over the Bering Strait land bridge. Bet they wish they could make America great again ...

The team estimates that those two groups split about 34 million years ago, a timeline that doesn't quite add up with the land-bridge idea, as clear routes from the Americas via the Bering Strait ...