The leading theory about how early humans arrived on the American continents is that they walked from Asia to North America over a strip of land that has since been covered by the ocean. This is commonly known as the Bering Land Bridge theory or the Beringia theory. It suggests that during periods of glaciation, sea levels were lower, exposing a land bridge between present-day Siberia and Alaska, allowing early humans to travel across.
The leading theory about how early humans arrived on the American continents is that they walked from Asia to North America over a strip of land that has since been covered by the ocean. This theory is known as the Bering Land Bridge theory. It suggests that during the last Ice Age, sea levels were much lower, exposing a land bridge between Siberia and Alaska called Beringia. It is believed that humans migrated from Asia across this land bridge and eventually populated the Americas.