T. rex hunted live prey
Fossils yield tooth in healed wound of another dinosaur
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2013/07/ew_pnas.jpg?fit=860%2C460&ssl=1)
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