The Beringian land bridge was a land connection that existed during the last Ice Age, approximately 20,000 years ago. It linked present-day Siberia in Russia to Alaska in the United States. This bridge allowed humans and animals to migrate between Asia and North America when sea levels were lower. As the climate warmed and ice melted, the land bridge submerged, creating the Bering Strait. This event played a crucial role in the migration of early humans, contributing to the peopling of the Americas. The land bridge is an important topic in studies of human history and prehistoric migration patterns.