What happened to all the dinosaurs that once roamed the earth? Roughly 65 million years ago, the last of the dinosaurs were wiped out, and science still isn't certain why. The Coelophysis of over 200 million years ago were fierce cannibals. The Quetzalcoatlus of 95 million years ago were like birds, but grew as large as some of today's airplanes! See pictures of these and many other dinosaurs and discover when they lived, what they ate, and how each kind was unique. A time line runs through the pages of this book to help you keep track of the dinosaurs' long history.