USA HISTORY

Detailed explanation-1: -The settlement of the Americas began when Paleolithic hunter-gatherers entered North America from the North Asian Mammoth steppe via the Beringia land bridge, which had formed between northeastern Siberia and western Alaska due to the lowering of sea level during the Last Glacial Maximum (26, 000 to 19, 000 years ago).

Detailed explanation-2: -As of 2008, genetic findings suggest that a single population of modern humans migrated from southern Siberia toward the land mass known as the Bering Land Bridge as early as 30, 000 years ago, and crossed over to the Americas by 16, 500 years ago.

Detailed explanation-3: -The water level dropped so much that the ocean floor under the shallow Bering and Chukchi seas was exposed, forming a land bridge that both animals and people could traverse. The land bridge measured about 1, 000 miles north-to-south at its maximum extent.

Detailed explanation-4: -Beringia, also called Bering Land Bridge, any in a series of landforms that once existed periodically and in various configurations between northeastern Asia and northwestern North America and that were associated with periods of worldwide glaciation and subsequent lowering of sea levels.

Detailed explanation-5: -What was the Bering Land Bridge made of? The Bering Land Bridge was made of land. During the Ice Age, sea levels dropped, exposing land in some areas. The Bering Land Bridge was located where the Bering Strait is now, a shallow area whose water levels dropped and exposed the land bridge during the Ice Age.