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Tyrannosaurus ( / tɪˌrænəˈsɔːrəs, taɪ -/) [a] is a genus of large theropod dinosaur. The type species Tyrannosaurus rex ( rex meaning "king" in Latin ), often shortened to T. rex or colloquially T-Rex, is one of the best represented theropods.
Apr 1, 2014 · “Tyrannosaurus” is Greek for “tyrant lizard,” and “rex” means “king” in Latin. So, Tyrannosaurus rex was “King of the Tyrant Lizards.” When and where did T. rex live? T. rex lived about 66–68 million years ago during the Cretaceous Period in the western United States, including Montana and Wyoming. What was the world like when T. rex was alive?
- Strengths
- Weaknesses
- Growth Spurts and Extinction
Tyrannosaurus rex, whose name means “king of the tyrant lizards,” was built to rule. This dinosaur’s muscular body stretched as long as 40 feet—about the size of a school bus—from its snout to the tip of its powerful tail. Weighing up to eight tons, T. rex stomped headfirst across its territory on two strong legs. These dinosaurs likely preyed on l...
Not everything about Tyrannosaurus rex was fierce, however. This dinosaur had unexpectedly puny arms, and the function of these little limbs is a source of debate among scientists. Some believe the animal’s arms were an evolutionary leftover—like the pelvic bones of a snake—or served non-predatory purposes like helping it grip a mate. Others argue ...
Tyrannosaurus rex had a life expectancy of about 28 years. Previous studies have suggested that it went through a growth spurt in its teenage years, but until recently, scientists didn’t know much about how it grew from a hatchling to a powerful predator. In January 2020, a study of the fossils of Nanotyrannus—a smaller tyrannosaur that was believe...
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- Amy McKeever
May 16, 2024 · Tyrannosaurus rex is the best-known and largest member of a group of theropod dinosaurs called tyrannosaurs; its scientific name is Latin for “king of the tyrant lizards.”. Since 1902 paleontologists have recognized the T. rex as the only formal member of the genus Tyrannosaurus.
- John P. Rafferty
Apr 1, 2024 · Animals. Extinct Species. Dinosaurs. Tyrannosaurus rex: Facts and photos of the dinosaur king. References. By Laura Geggel. last updated 1 April 2024. Tyrannosaurus rex was one of the largest...
Part of Hall of Saurischian Dinosaurs. D. Finnin/© AMNH. More in Hall of Saurischian Dinosaurs. The 4-foot-long jaw. The 6-inch-long teeth. The tiny arms. Almost everything about Tyrannosaurus rex indicates the enormous power of one of the largest theropod dinosaurs that ever existed.
Tyrannosaur, any of a group of dinosaurs that lived from the late Jurassic Period to the late Cretaceous Period. Most were large predators, with very large skulls approaching or well exceeding a full meter (more than three feet) in length. The best-known and largest member of the group is Tyrannosaurus rex, or T. rex.
