Biologists have been puzzled by the evolutionary adaptation behind a common tooth trait of northern Asians and Native Americans: shovel-shaped incisors. An analysis of archeological specimens shows ...
Decreased vitamin D levels in the Native American population during the last ice age led to increased breast milk flow and ‘shovel-shaped incisors.’ This story starts 28,000– 18,000 years ago as the ...
The critical role that breast feeding plays in infant survival may have led, during the last ice age, to a common genetic mutation in East Asians and Native Americans that also, surprisingly, affects ...
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