Bøger af P.K. Blair

Step back in time to the geologic era of Jurassic dinosaurs. Meet the ten dinosaurs of the Dinosaur National Monument in Utah. These huge creatures lived between 201.2-145 million years ago. They lived long before the T-Rex and Triceratops of the Cretaceous era. These dinosaurs either ate meat or plants and their teeth evolved to suit their needs. After all their teeth helped them eat!