“First horned face”
Late Cretaceous, 75-71 million years ago
This early Triceratops relative was only about the size of a sheep, and had no horns. Its beak-like snout and trademark frill, however, mark it as a forerunner of the later horned dinosaurs. A famous fossil found in 1971 preserves a Protoceratops locked in combat with a Velociraptor, buried suddenly by a collapsing dune. The fossil is often touted as proof that standing up to bullies ends poorly.