How did lower sea levels create the Bering land bridge during the Ice Age?

During the Pleistocene Epoch, the formation of the Bering land bridge—often referred to as Beringia—was driven by global climate shifts. As massive continental glaciers grew, they sequestered vast amounts of Earth’s water, which caused worldwide sea levels to drop by as much as 400 to 426 feet (120 to 130 meters).12

This significant reduction in sea level exposed large areas of the shallow seafloor between northeastern Asia and northwestern North America. Specifically, the region now occupied by the Bering Strait and the northern half of the Bering Sea became a vast, dry land bridge. This connection allowed for the migration of plants, animals, and humans between the continents until the glaciers eventually melted, causing sea levels to rise and submerging the land bridge once again.132