The Triassic and Early Jurassic periods were the time periods in which dinosaurs first appeared. Learn more about the Triassic and Early Jurassic dinosaurs, such as the Lufengosaurus, Massospondylus, and Scutellosaurus.
Scelidosaurus was discovered in the 19th century. At the time, it was one of the most complete dinosaur skeletons ever found. It was a heavily built plant eating dinosaur that grew to around 13 feet in length.