240M BCE – 66M BCE
 
Trace the theoretical evolution of the major groups of dinosaurs from the Triassic, Jurassic and Cretaceous periods. View when specific dinosaurs roamed the Earth. Did you know Stegosaurus and Tyrannosaurus rex lived over 70 million years apart? T. rex lived closer to modern humans than they did to Stegosaurus!
 
Geologic time scale included for reference:  Era, Period, Epoch, Age.