- How the oldest bird fossils are about 150 million years old.
- That birds evolved from a group of meat-eating dinosaurs called theropods. That's the same group that Tyrannosaurus Rex belonged to, although birds evolved from small theropods.
- How these ancient birds looked quite a lot like small, feathered dinosaurs and they had much in common. Their mouths still contained sharp teeth.
- That over time, birds lost their teeth and evolved beaks.
This book is from the Incredible Evolution series, a fascinating, informative collection of books which examine the development of life on earth. Other titles available include: When Plants Took Over the Planet, When We Became Humans, and When the Whales Walked.