Long ago in the Jurassic age, 150 million years before the present day, a strange and wonderful assortment of dinosaurs lived on Earth. This was tens of millions of years before the time of dinosaur "superstars" like triceratops and tyrannosaurus, but there were plenty of famous, interesting animals alive at that time, too. Stegosaurus was one of these - a bus sized creature with two rows of plates sticking up along its back like the frill on the...