Paleontologist David Burnham and others at the Kansas University Biodiversity Institute have found what they believe is conclusive proof that the Tyrannosaurus rex was indeed a predator and not just a scavenger. Burnham is holding a cast of a fossil from a section of a hadrosaur backbone, which has a TRex tooth embedded within it. The fossil was found in the Hell Creek formation in South Dakota by a student of Burnham's.

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