Jul 15, 2013 3:17 PM by Associated Press
NEW YORK (AP) - Scientists have found new evidence that T. rex hunted animals for food and wasn't just a scavenger.
A fossil from South Dakota shows part of a tooth from a Tryrannosaurus rex in the tail of a duckbill dinosaur. Some bone grew around the tooth, which indicates the duckbill survived. That means it was clearly alive and not just a carcass when the hungry T. rex bit the tail.
Scientists say that's strong evidence that T. rex ate live animals rather than just scavenge.
Outside experts say there was already ample evidence for that. But they said the fossil is the first to show a T. rex tooth embedded in another animal's bones.
The work was published Monday by the Proceedings of the National Academy of Sciences.
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