Crâne de stégosaure

Musée

You can't talk about Stegosaurus without talking about the distinctive diamond-shaped plates on its back. These plates, while made of bone, were not actually connected to the animal's skeleton! They simply grew out from the skin, remarkably enough, and were up to two feet tall and similarly wide. It's not clear exactly how the plates were arranged or what they were for. Yet more mysteries of the ancients!