Tyrannosaurus rex, or T-Rex, is one of the most well-known dinosaurs of all time. And with good reason! It's one of the largest carnivorous dinosaurs ever found, growing to over 40 feet long, with teeth that could measure over a foot in length! This Tyrannosaurus Rex toy figure is much smaller than the real thing, but still full of excellent details (and teeth)! History: This theropod dinosaur was one of the last non-bird dinosaurs, dying out at the end of the Cretaceous Period around 66 million years ago. Throughout time T-Rex has been thought of as both a predator and a scavenger, though today most scientists believe it was a hunter who preyed on other dinosaurs, such as ceratopsians and ornithopods. Scientific name: Tyrannosaurus rex meaning tyrant lizard and king Characteristics: This Tyrannosaurus figure is rearing up with its mouth wide open, showing off its renowned chompers.