Dinosaur Bones (Let'S-Read-And-Find-Out Science 2)Read and find out about how we know what dinosaurs looked like in this colorfully illustrated nonfiction picture book. Dinosaurs roamed the earth millions of years ago. Then suddenly they all died out. How do we know now what they looked like? How do we know that they really existed at all? Read and find out how scientists have proven the existence of dinosaurs by studying fossil remains. Each new fossil find helps them to piece together a picture of