Diplodocus is one of the longest dinosaurs ever to have lived and one of the best-known, as several skeletons have been discovered. Its long, whip-like tail was a wicked weapon! Discover how fast it could move with the Speed-o-Meter, how terrifying it was on the Scary Scale, and which of today's animals it most resembles. With a name meaning 'double beam,' the Diplodocus stood on four legs and lived during the late Jurassic period. This dinosaur was known for having a long neck, and each of the photographs and diagrams in this volume allow for readers to explore the Diplodocus and learn about its behaviors, strength, and ways of living"