When Dinosaurs Conquered the Skies is an exquisitely illustrated exploration of how dinosaurs evolved flight and eventually became the birds we live with today.

What are birds, and where did they come from? Discover fascinating facts about bird evolution, including:
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 ...