Tyrannosaur Fossil Indicates Dinosaur Got Smart First, Then Grew Big

March 14, 2016 7:13 PM

42 0

Tyrannosaur Fossil Indicates Dinosaur Got Smart First, Then Grew Big

At the end of the dinosaur age, Tyrannosaurus rex was a behemoth killer animal, up to 40 feet long and weighing several tons — the top carnivore in the food chain.

The very first tyrannosaurs, which arose about 100 million years earlier, were small, about the size of a person.

Also watch: Alshon Jeffery reportedly won't get Bears' franchise tag, is about to get huge payday

Read more

To category page

Loading...