Dinosaurs, the ancient reptiles that once ruled the earth, mysteriously died out 65 million years ago. Scientists have discovered evidence of more than 800 unique species in sizes large and small, with every variation imaginable. Learn about all types of dinosaurs and how they evolved as the earth changed over millions of years. Discover which species lived where and when, and how the various species interacted. Find out who had all the brains and brawn among these beasts. Unearth all this and more with this fun book and puzzle set from Silver Dolphin. Recommended for ages five and up, kids can quench their curiosity about these historic beasts.