What allowed the land bridge over what is now Bering strait to for?

The land bridge over what is now the Bering Strait, known as Beringia, formed during the last Ice Age when sea levels dropped significantly due to the vast amounts of water trapped in glaciers. This drop exposed the continental shelf between Asia and North America, creating a pathway for migration. The cold, dry climate of the region also allowed for the development of a tundra ecosystem, supporting various species and enabling human and animal movement across the land bridge.