Tyrannosaurus, full name Tyrannosaurus Rex and abbreviated to T-Rex, is a theropod known in North America during the late-cretaceous period, around seventy-one-million-years ago. It is possibly the best-known dinosaur of all.
They are nicknamed "Big Jaw"/
Tyrannosaurus is well-known to have small-arms with two-fingers on each, a large head with bone-crushing-jaws, and forward facing eyes. Some believe newborns were feathered.