In our A-Z hardcover format children can explore details of prehistoric life including theories about extinction and the biggest meat-eater ever known! Paleontologists aren't the only ones who have made contributions to the study of dinosaurs. Some important discoveries were found by children including 12-year-old Mary Anning! Dramatic, action-filled paintings let readers of all ages roam the prehistoric world. From the ferocious Giganotosaurus to the most famous dinosaur that never lived (Ultrasaurus), budding scientists will discover new facts and explore challenging new theories in D is for Dinosaur.