Have you ever wondered why Stegosaurus had giant plates down its back, or how big a T. rex's brain was? Find out in this mind-blowing guide to some of the fiercest dinosaurs around!Travel back in time and use your special micro-scanner to reveal the secrets of the mighty dinosaurs, and discover why these famously fearsome beasts were the perfect prehistoric predators. From the amazing survival skills of the tiny Compsognathus, to the sheer power of a T. rex's jaws, there's tons for dino-fans to discover!