Like North America's Native People, anthropologists and archaeologists also have creation stories which explain how America's native peoples came to be, though their stories differ markedly from those of most of the Native People. It's not a better story, just a different one. The short, and until a few years ago the standard textbook, version goes like this:
Humans first evolved in Africa some 4 to 5 million years ago. Over the next 4 million years, through the interplay of evolution and adaptation, survival and extinction, many species of humans evolved. By about 100,000 - 120,000 years ago, people physically like modern humans had evolved in Africa and sometime around 100,000 years ago some of them migrated out into the rest of the world, reaching central and eastern Asia by at least 40,000 to 50,000 years ago. And it was from these "out-of-Africa" populations that the first immigrants into the Americans came,reaching North America sometime before 12,000 years ago. Some of these immigrants walked into America via a land bridge that at one time linked northeast Asia with Alaska. Others came by boat, moving along the southern coast of the land bridge.