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Let us to know more about Tyrannosaurus-REX-- KING of Dinosaurs, Who is it?

publisher: Echo
time: 2016-08-17
Summary: t rex facts

Aside from being one of the largest of the known carnivorous dinosaurs,Tyrannosaurus rex — T. rex, for short — is the dinosaur that has arguably received the most media exposure. It had a starring role in the "Jurassic Park" movies and has a renowned exhibit at the American Museum of Natural History in New York City.

The name Tyrannosaurus rexmeans "king of the tyrant lizards": "tyranno" means tyrant in Greek; "saurus" means lizard in Greek, and "rex" means "king" in Latin. In 1905, Henry Fairfield Osborn, president of the American Museum of Natural History at the time, named Tyrannosaurus rex.

T. rex was a member of the Tyrannosauroidea family of huge predatory dinosaurs with small arms and two-fingered hands. Aside fromTyrannosaurs, other Tyrannosaurid genera include Albertosaurus,AlectrosaurusAlioramusChingkankousaurusDaspletosaurus,EotyrannusGorgosaurusNanotyrannus (a controversial genus that might, in fact, be an adolescent T. rex), ProdeinodonTarbosaurus andZhuchengtyrannus.

The largest and most complete T. rex skeleton ever found was nicknamed Sue, after its discoverer, paleontologist Sue Hendrickson. Measurements of Sue suggest T. rex was one of the largest carnivorous dinosaurs to ever live, coming in at up to 13 feet (4 meters) tall at the hips (the beast's highest point since it did not stand erect) and 40 feet (12.3 m) long. A recent analysis of Sue, published in 2011 in the journalPLOS ONE, shows T. rex weighed as much as 9 tons (about 8,160 kilograms).

T. rex had strong thighs and a powerful tail, which counterbalanced its large head (Sue's skull is 5 feet, or 1.5 m, long) and allowed it to move quickly. The 2011 study, which also modeled T. rex's muscle distribution and center of mass, suggests the giant could run 10 to 25 mph (17 to 40 km/h), as previous studies had estimated.

Its two-fingered forearms were puny, making it unlikely that T. rex could use them to kill or even get a meal to its mouth. "We don't know what the tiny arms were used for," said University of Kansas paleontologist David Burnham.

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