USA HISTORY

Detailed explanation-1: -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-2: -Scientists one theorized that the ancestors of today’s Native Americans reached North America by walking across this land bridge and made their way southward by following passages in the ice as they searched for food. New evidence shows that some may have arrived by boat, following ancient coastlines.

Detailed explanation-3: -"According to the Land Bridge Theory, Native Americans migrated from Asia to North America across a land bridge that formed during the Ice Age.” The First Americans Explanation for Kids. “They were hunter-gatherers, and they didn’t live in America.

Detailed explanation-4: -The Bering Land Bridge Theory-Bering Land Bridge National Preserve (U.S. National Park Service)

Detailed explanation-5: -The land beneath the Bering Strait became exposed and a flat grassy treeless plain emerged connecting Asia to North America. This exposed land stretched one thousand miles from north to south. As the ice age ended and the earth began to warm, glaciers melted and sea level rose.