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 first people who came to Alaska likely trekked on foot across a land bridge during the last ice age. It's always been a bit of a mystery how they survived the long, dark winters we still see today ...

Leslea Hlusko does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

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 ...