TRICERATOPS and other horned herbivores. Included in the twelve dinosaurs featured are some of the most strangely shaped animals that ever roamed Earth. These massive herbivores had arrays of horns protruding from their skulls. Growing outwards from the backs of their heads were large, patterned frills used to scare their enemies and attract mates during courtship displays. Each title in the series, Dinosaurs! takes a close look at one particular type of dinosaur and reveals the facts about these incredible creatures.