WATCH: A rare glimpse of the dome-headed dinosaur fossil

A remarkably complete skull of Pachycephalosaurus, a dinosaur famed for its domed head, will be on display at the National Museum of Natural History.

​A remarkably complete skull of Pachycephalosaurus, a dinosaur famed for its domed head, will be on display at the National Museum of Natural History.   A remarkably complete skull of Pachycephalosaurus, a dinosaur famed for its domed head, will be on display at the National Museum of Natural History.