Well, it’s a dinosaur, of course.  But which?  There aren’t very many of their fossils found, most of them being in North America where, you know, everything is paved over.  But!, of those which have been found, we conclude the pachycephalosaurus was over fifteen feet long, with large strong back legs and rather underdeveloped front arms.  Poor thing.  Imagine it trying to compete in the competitions on All Fours Day during Cretaceous Day celebrations with the family.  On the other hand, good heavens, those knobby knobs at the side of its face…theories abound that this species is behind the origin of the word “bone-headed”, and who are we to argue?