Details: This poster shows two Tyrannosaurus Rexes. At the bottom it says 'T. Rex'.
Tyrannosaurus (meaning 'tyrant lizard'), is a genus of theropod dinosaur. The species Tyrannosaurus rex ('rex' meaning 'king' in Latin), commonly abbreviated to T. rex, is a fixture in popular culture. Tyrannosaurus was a bipedal carnivore with a massive skull balanced by a long, heavy tail. By far the largest carnivore in its environment, Tyrannosaurus rex may have been an apex predator, preying upon hadrosaurs and ceratopsians, although some experts have suggested it was primarily a scavenger.