T. rex hunted live prey

Fossils yield tooth in healed wound of another dinosaur

In a healed wound in the tailbone fossil of a duck-billed dinosaur (left, site of wound in red), researchers found a Tyrannosaurus rex tooth crown lodged in a pair of fused bones (right, circle denotes location of the tooth). This discovery is direct evidence that T. rex hunted.

R.A. DePalma II et al/PNAS 2013

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