WASHINGTON, Aug 27 (Reuters) - Bipedal locomotion - walking upright on two legs - is a fundamental trait underpinning humankind's success. Scientists now have identified two innovations that occurred ...

The human brain has an extraordinary ability to take a fundamental biological need and develop it in ways completely unknown to other species. Many species build or inhabit shelters or nests: but only ...

The first time a computer beat a human chess champion, doomsayers proclaimed it was the beginning of the end. That was nearly three decades ago, and contrary to those dire predictions, humans haven't ...

The most luxurious human characteristic—and the one that preoccupies us the most—might be our hair. We curl it, dye it, cut it, braid it and straighten it. We style it to suit our self-image, spending ...