Welcome to the exciting world of paleontology! This book is about the discovery of the Triceratops dinosaur, including information about the dinosaur's appearance, movement, and diet before it became extinct. A massive pair of animal horns is found near the Rocky Mountains. Is it a bison—or a Triceratops? --The North American Dinosaurs series introduces readers to some of the most fascinating beings in paleontology. Each book covers what scientists know and what they are still working to learn about these prehistoric beasts. Each book includes a glossary, comprehension questions, and an extension activity.