'Hogwarts' Dragon Unveiled By Larry O'Hanlon, Animal Planet News May 24 — A dragon-like dinosaur named after Harry Potter's alma mater has performed a bit of black magic on its own family tree, say paleontologists who unveiled the "Dragon King of Hogwarts" on Monday in Albuquerque. The newly described horny-headed dinosaur Dracorex hogwartsia lived about 66 million years ago in South Dakota, just a million years short of the extinction of all dinosaurs. But its flat, almost storybook-style dragon head has overturned everything paleontologists thought they knew about the dome-head dinos called pachycephalosaurs. "What you knew about pachycephalosaurs — you...