| Today's bullies of the Serengeti plains, lions and spotted hyenas, were paralleled by tyrannosaurs in Jurassic and Cretaceous ecosystems. |
| Birds did not evolve from massive sauropods or antediluvian, tanklike ankylosaurs or even from the large tyrannosaurs. |
| Throughout the Late Cretaceous, tyrannosaurs diversified into several species, all with large heads, powerful bodies, and two-fingered hands. |
| In fact, he's headed to Montana this August to excavate tyrannosaurs and triceratops. |
| Because feathers are a unique feature, they are thought to be characteristic of many theropod dinosaurs, including tyrannosaurs. |
| The large carnosaurs and tyrannosaurs also appear to have shorter teeth than would be expected for a mammalian carnivore of their body size. |
