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Tyrannosaurus rex

Fun Facts

NAME: Tyrannosaurus rex

Meaning: Tyrant Lizard

Pronounced: TIE-ran-oh-SORE-us

First Described by: Henry Fairfield Osborn in 1905

DIET: Carnivore, was probably both an active predator and a scavenger

Length: up to about 40 feet (12.3 meters) long

Height: 12 feet (3.66 meters) at the hips

Weight: 9.3 tons

WHEN IT LIVED: Late Cretaceous, 68 to 66 million years ago

WHERE IT LIVED: Western North America, which at the time was an island called Laramidia. Fossils found in from Wyoming to Mexico.


              Genus Tyrannosaurus

                Species: Tyrannosaurus rex

FUN FACTS: Tyrannosaurus rex was one of the last non-avian dinosaurs, dying out when the Cretaceous ended 66 million years ago. In Arizona, they live alongside Alamosaurus, Torosaurus, Bravoceratops, Ojoceratops, Edmontosaurus, Kritosaurus, Gryposaurus, Glypotodntopelta, Ojoraptosaurus, Troӧdon, and Richardoestesia. Also living alongside them was the pterosaur Quetzalcoatlus.

Feathers? Some dinosaurs related to Tyrannosaurus are known to have had feathers, and some have speculated that Tyrannosaurus did too. Most paleontologists now seem to agree that they probably had feathers as young, but adults would probably have had few if any. Skin impressions thought to be from the belly of an adult Tyrannosaurus, that apparently stopped on mud to rest, did not show any signs of feathers.

 Installing our Tyrannosaurus rex skull on the outside wall.