Neanderthals are the closest extinct human relative. With their large middle part of the face, huge nose, and angular cheekbones, they seem like completely different creatures to us—cavemen. However, they were not so different from us as their brains were as large as ours and there’s even some evidence that they buried their dead, occasionally marking graves with offerings such as flowers. And that’s something that no other primate or human species has ever practiced beside us.