March 5, 2014

Not Lambeau Field

Filed under: Pre-Clovis — acagle @ 8:18 pm

10,000 years on the Bering land bridge

O’Rourke and colleagues point to a study of mitochondrial DNA – genetic information passed by mothers – sampled from Native Americans throughout the Americas. The study found that the unique genome or genetic blueprint of Native Americans arose sometime before 25,000 years ago but didn’t spread through the Americas until about 15,000 years ago.

“This result indicated that a substantial population existed somewhere, in isolation from the rest of Asia, while its genome differentiated from the parental Asian genome,” O’Rourke says. “The researchers suggested Beringia as the location for this isolated population, and suggested it existed there for several thousand years before members of the population migrated southward into the rest of North and, ultimately, South America as retreating glaciers provided routes for southern migration.”

You really have to think of it not as a “land bridge” but more of almost a continent in and of itself, such that people living there wouldn’t even think of themselves as “crossing over to” anywhere. Then it makes more sense.

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