Dr. Scott explains the difference between human teeth and T. Rex teeth.

How would Tyrannosaurus rex look with lips? Our view of T. Rex as a fearsome-looking dinosaur with razor-sharp fanged teeth may need to change.

How would Tyrannosaurus rex look with lips? Our view of T. Rex as a fearsome-looking dinosaur with razor-sharp fanged teeth may need to change.

Discover showtimes, read reviews, watch trailers, find streaming options, and see where to watch Dinosaur Train: T.rex Tales (2012). Explore cast details and learn more on Moviefone.

Dinosaur teeth discovered by a now retired quarryman have revealed a community of prehistoric predators that lived around 135 million years ago in an "exciting" discovery.

Scientists have discovered a previously unknown species of predatory dinosaur with shark-like teeth that would have been the T. rex of its day.