Packed with bite-size facts and exciting prehistoric puzzles, this book explains what the world looked like when dinosaurs existed and how it changed; which incredible creatures, plants, and animals lived then; who survived to live another day; and how scientists know all this. Each colorful double-page spread explores a different dinosaur subject, from a particular period of time or group of animals to dinosaur diets and the study of fossils. Readers will meet the world's first known bird and the deadly animal that may have terrified the terrible T. Rex; discover who lived when and who ate what in fun dinosaur quizzes and games; and find out why all the dinosaurs disappeared forever. With eye-catching illustrations and photographs of specimens from a natural history museum's palaeontological collections, this is a great first book about dinosaurs and the world in which they lived.