When gazing at the vast spectrum of the animal kingdom, it is easy to focus on the similarities we share with other creatures. From the basic structure of our skeletons to the complex workings of our ...

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 ...

Humans are the only primates with a chin, leaving biologists to wonder why we acquired this unique feature. According to a new analysis of head anatomy in apes, it probably didn’t evolve for a ...