An Ankylosaurus grazes at the river's edge when he is attacked by a Tyrannosaurus rex and must defend himself using his natural armor and powerful tail.

"Includes a read-along CD and a tear-out poster!"--Cover.

A dinosaur with an armored back chomps on plants. It swings its tail at a hungry meat eater. Was that a Stegosaurus? Or was it an Ankylosaurus? These dinosaurs

This series uses reconstruction artwork to show what these creatures looked like and how they lived. Maps, timelines, and fact files help explain how scientists