Protoceratops andrewsi

This Protoceratops andrewsi skull, roughly the size of that of a sheep, was found in Mongolia and dates back 75 to 71 million years, in the Late Cretaceous Period. The first palaeontologists to work in Mongolia's Gobi Desert were from the American Museum of Natural History in the 1920s. They were looking for human remains, but found many examples of Protoceratops skulls, with specially adapted jaws. At the front of its mouth, a sharp, narrow beak sliced leaves from plants. Further back, scissor-like teeth chopped food, but without grinding it before swallowing. This system was well-suited to dealing with tough, low-growing and fibrous plants, such as palms and cycads.