The land bridge across the Bering Strait that lasted ... creating an enormous region known as Beringia. Or at least it was assumed the land was dry. Most of Alaska and the eastern tip of Siberia ...

Before cities and politics, North America was a vast, untouched wilderness, ruled by strange megafauna. Around 30,000 years ago, the Paleo-Indians, ancestors of Native Americans, crossed the Beringia ...