Despite the many differences between humans and other creatures, there are also plenty of similarities. Many creatures have hair, a heart, eyes, and a powerful brain just like ours. But there’s one feature we don’t share with any other species: our chins. “If you’re looking across all of the hominids (early forms of humanbeings), which is the family tree after the split with chimpanzees, there aren’t really that many features that we can say are exclusively human,” James Pampush, PhD, co-author of The Enduring Puzzle Of The Human Chin, told NPR. “The one thing that really sticks out is the chin.”