An introduction to different dinos--and the people who discover and study them--from beloved nonfiction picture book master Gail Gibbons, now updated to the minute! Who discovers dinosaurs? What happens to a dinosaur bone when it's found? What exactly were dinosaurs, anyway, and how many different kinds were there? In this simple-but-thorough book, Gail Gibbons covers the basics of paleontology, dinosaurs, dinosaur families and evolutions, and the K-T extinction. Newly revised, Dinosaur Discover ies also includes updates that address dinosaur biology and details of the extinction event.