Scientists found a Tyrannosaurus Rex tooth embedded in the tailbone of a duckbilled dinosaur. Now, everybody wants to know: Does this mean T.Rex really was a predator, rather than a scavenger, as has been proposed in previous studies? The correct answer is "STFU." That's my paraphrase of John Hutchinson — who studies the biomechanics of large animals, including T.Rex. He says the "controversy" here doesn't really exist. That's because most carnivores are both predators and scavengers and most paleontologists would agree that T.Rex is no exception to that rule.