The dinosaur’s teeth were designed for crushing bone, indicating a diet that included large herbivorous dinosaurs. Tyrannosaurus rex lived during the Late Cretaceous period, about 68 to 66 ...

Scientists say this animal was likely one of the smartest dinosaurs to ever walk the Earth—and it may be a critical link in prehistoric evolution.

As one of the smartest dinosaurs, it had the largest brain-to-body ratio of any of the other dinosaurs. And we also know that this small theropod could likely run fast, though we don’t know how fast.