Study: Native Americans Came to the New World in Three Waves

By Dan Vergano, USA TODAY 

Native Americans streamed into the New World in at least three waves of migration starting more than 15,000 years ago, a gene study released Wednesday suggests.

 North and South America were totally empty of people until the first arrivals from Siberia crossed a land bridge into Alaska, spreading in a few thousand years to the tip of South America. The genetic study may help settle a debate between a long-held view that the peopling of the continents came as one event instead of the more recently supported notion, backed by this study in the journal Nature, that the migration happened in three distinct waves.

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Note:  Much evidence of the story of the peopling of the Americas is almost surely waiting to be found under the waters of Pacific Ocean off the coasts of North and South America, sea level having risen considerably since the last Ice Age. Indeed, it is possible that one or more of the waves of settlement came from Asia by sea, following the coast as it was at that time, and did not use the celebrated Alaskan/Siberian land bridge at all.