Allosaurs hunted with sharp teeth, and Steogosaurs developed bones like armor to stay safe from fierce predators. It's no wonder dinos ruled Earth back in the Jurassic period. But what about creatures flying high in the sky or the predators lurking under the waves? Many of those animals were not dinos. Become a paleontologist of the Jurassic as you explore colorful illustrations and fabulous fossil photos to take a trip back in time and discover who was and was not a dino.