Tyrannosaurus rex

Name Tyrannosaurus rex
(tuh-RAN-uh-SOR-us)
Tyrannosaurus rex
Means King of the tyrant lizards
Period Late Cretaceous
Where North America: Colorado, Montana, New Mexico, Wyoming, Alberta
Size Length: over 40 feet
Height: 13 feet (at the hips)
Weight: 14,000 lbs
  As the last great carnivore of the Cretaceous Period, Tyrannosaurus rex was an efficient killing machine stalking the North American landscape. With a specially strengthened nose structure that enabled it to deliver bone splintering, crushing bites to both captured prey and during combat with others of its species, a Tyrannosaurus rex lower jaw could deliver 10,000 newtons of force – the equivalent of being able to lift a semi-trailer.