Dinosaurs came in all shapes and sizes and were the main animals on Earth for 150 million years. Learn all about these amazing prehistoric creatures in Incredible But True: Dinosaurs! Which dinosaur was the size of an airplane? Which giant of the sea had a head almost ten feet long? Who had the most powerful jaws? From the fast and fierce Velociraptor to the terrifying Tyrannosaurus, find out all about dinosaurs and other amazing reptiles who once...