Navigate: (use the links to quickly navigate your virtual bookstore)

Realistic illustrations and charming cartoons combine to reveal the mysteries behind such inquires as when did life on earth begin and what killed the dinosaurs, in an innovative reference that satisfies any child's curiosity about the prehistoric world. Reprint.

---

"What were the ice ages?," "When did reptiles appear?," and "Where did birds come from?" are questions that children will be able to answer after reading this fascinating book about the beginning of life on Earth.

Jackie Gaff has over 20 years' experience in illustrated books for children. Previously a nonfiction editor, she is now a full-time author with a real commitment to, and enthusiasm for, creating books that children both want and are able to read. Gaff is also the author of three other I Wonder Why books: I Wonder Why Fish Grew Legs, I Wonder Why Mountains Have Snow on Top, and I Wonder Why the Sahara Is Cold at Night