The Stegosaurus Was An Ancient Relic To The T.Rex
It's a common misconception to lump together all non-avian dinosaurs into a single time period. The truth is, dinosaurs roamed the Earth for a long time, and they all most certainly did not exist together. For example, the stegosaurus roamed the Earth during the late Jurassic period, between 156 and 144 million years ago. On the other hand, the Tyrannosaurus rex lived during the late Cretaceous period, about 67-65 million years ago. The T.rex actually existed closer in history to humans than to the stegosaurus.