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World map of human migrations, with the North Pole at center. Africa, harboring the start of the migration, is at the top left and South America at the far right. Migration patterns are based on studies of mitochondrial (matrilinear) DNA.Numbers represent thousand years before present.The blue line represents area covered in ice or tundra during the last great ice age.

World map of human migrations, with the North Pole at center. Africa, harboring the start of the migration, is at the top left and South America at the far right. Migration patterns are based on studies of mitochondrial (matrilinear) DNA.

Numbers represent thousand years before present.

The blue line represents area covered in ice or tundra during the last great ice age.

 
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