T. rex's oldest known cousin: Lythronax argestes

A new species of tyrannosaur has been unearthed in Utah, with skull bones showing an 80 million-year-old beast that is the oldest known cousin of the legendary T. rex. The meat-eating Lythronax argestes, which means "king of gore," had wide-set eyes that helped it track prey and a load of teeth packed into a more slender snout than T. rex.