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.
Yunnanosaurus was a long-necked, four-legged plant-eater that lived in the Early Jurassic Period. The animal was about 18-25 feet in length and lived in what is now China. What do we know about this dinosaur's behavior?