How do we know what dinosaurs ate? How do we know what they look like? How can we know T. rex bit other animals in the butt? These animals died out 65 million years ago, so it seems impossible that scientists can know any of this for sure. But, through fossils, many mysteries about dinosaurs have become clear. In this colorful, fun-filled set, readers find out all about dinosaurs and the fossils they left behind, as well as how these remains tell the story of these magnificent creatures. Full-color illustrations bring the dinosaurs back to life in astonishing cartoon detail.