Includes index.

"The animal kingdom as you've never seen it before"--Front cover.

What is an animal? -- Evolution and extinction -- Animal history -- The animal kingdom -- Invertebrates -- Fish -- Amphibians -- Reptiles -- Birds -- Mammals -- Animal science.

Follow the timeline of evolution and extinction of animals throughout history and see how different animals have adapted to their environments to survive in Knowledge Encyclopedia: Animal! Covering all the major animal groups and how they fit into the tree of life, photorealistic computer-generated images, infographics, and cutaways that reveal the inner workings of the animals make sure that everything is easy to understand at a glance.