Twelve more dinosuars join everyone's favorites--such as Triceratops, Brachiosaurus, and T. rex--in a feast of more than eighty fascinating dinosaurs. Agustinia was a giant, four-footed plant eater with strange plates and spikes running down its back. Achelousaurus would have looked a lot like its relative Triceratops, if Triceratops's horns had been snapped off. Feathered Guanlong looked as fierce as its cousin T. rex--but Guanlong was only ten feet long. These three plus nine other new discoveries are here, walking, hunting, feeding, running, and raising their young. This popular book has been fully updated to match the latest scientific findings. Changes to the text and art have been made throughout, taking young readers into the science behind the beasts. The journey back to the Age of Dinosaurs has never been so strange or fascinating as it is today.