Human evolution is often told as a tidy story of adaptation, yet some of our most familiar body parts still defy straightforward explanation. From the jut of the human chin to the curve of the outer ...

The human body is a machine whose many parts – from the microscopic details of our cells to our limbs, eyes, liver and brain – have been assembled in fits and starts over the four billion years of our ...

Food processing has been a part of human adaptation since deep in the past. The softening and breaking down of food left its testimony on the human body. For example, the massive teeth of our early ...

Hobbits of Flores evolved to be small by slowing down growth during childhood, new research on teeth and brain size suggests. When you purchase through links on our site, we may earn an affiliate ...

Humans are the only primates that run nearly naked under the sun. Here’s how this biological tradeoff reshaped how our ancestors hunted, cooled themselves and survived.

The real revelation, however, came from the men. Men considered a larger penis as an indicator of a rival with both greater ...

Since the Middle Ages, the size of wild and domestic animals has largely been shaped by human selection: domestic animals are increasingly larger; wild animals increasingly smaller. During the 7,000 ...