Dinosaur Bones (Let's-Read-and-Find-Out Science 2)

How do we know what dinosaurs were like?

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 ice together a picture of what the world was like millions of years ago.