Finally: Actual physical evidence that T-rex was a predator

It looks like the most badass predator to have ever roamed the Earth, but paleontologists have struggled to prove that Tyrannosaurus rex actually hunted its prey, leading some to believe that it was a scavenger. Now, the discovery of a T-rex tooth embedded in the tail of a hadrosaur offers the first direct evidence. » 7/16/13 8:00am 7/16/13 8:00am