Stegosaurus means "roofed lizard," and everyone knows about the bony plates on its back. Scientists know a lot about these animals and their special plates, and now readers will learn how the plates kept Stegosaurus safe and even kept it warm when the weather outside was colder. From its spiky tail used to fight off other dinosaurs to the eggs it laid to have babies, Stegosaurus is an incredible animal readers will love learning about with the help of color illustrations showing what it likely looked like millions of years ago.