Did all the species of dinosaurs live together at the same time?
Both time and geography separated dinosaur communities. The “Age of Dinosaurs” (the Mesozoic Era) spanned three geologic time periods: the Triassic, Jurassic, and Cretaceous periods. Various dinosaur species existed during each of these. For example, the Jurassic dinosaur Stegosaurus had been extinct for around 80 million years before the Cretaceous Tyrannosaurus appeared.
Pangea, Earth’s supercontinent at the beginning of dinosaur history, had a diverse range of dinosaurs. However, as it disintegrated, dinosaurs were dispersed across the globe on separate continents, and new types of dinosaurs evolved independently in each.
