Tyrannosaurus rex

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Tyrannosaurus rex
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Saurischia
Family:	Tyrannosauridae

Tyrannosaurus rex, commonly abbreviated as T. rex, is one of the most well-known and iconic dinosaurs. It lived during the late Cretaceous period, approximately 68 to 66 million years ago, just before the Cretaceous–Paleogene extinction event that led to the extinction of most dinosaur species. The name Tyrannosaurus rex comes from Greek and Latin words meaning "tyrant lizard king."

Description

Tyrannosaurus rex was one of the largest land carnivores of all time, measuring up to 12.3 meters (40 feet) in length, up to 3.66 meters (12 feet) tall at the hips, and weighing up to 6.8 metric tons (7.5 short tons). The dinosaur's massive skull, which could reach up to 1.5 meters (5 feet) in length, was balanced by a long, heavy tail.

Distinctive features of T. rex include its large, powerful jaws with sharp, serrated teeth that could measure over 30 cm (12 in) in length. Its forelimbs were small and bore two clawed fingers.

Paleobiology

Diet and Feeding

Tyrannosaurus rex was a fierce predator, with evidence suggesting it was capable of killing and eating large herbivorous dinosaurs. Some paleontologists suggest that it also scavenged as a part of its diet.

Senses

Studies suggest that T. rex had highly developed senses, including excellent vision, hearing, and a strong sense of smell, which would have been beneficial for both hunting and scavenging.

Growth and Development

Research indicates that Tyrannosaurus rex grew rapidly during its juvenile years, a growth pattern similar to other theropod dinosaurs. The full adult size could be reached in just 20 years.

Discovery and Research

The first Tyrannosaurus rex fossils were discovered in 1902 by Barnum Brown, a paleontologist working for the American Museum of Natural History. Since then, numerous specimens of T. rex have been found in North American rock formations.

Cultural Impact

Tyrannosaurus rex has become a fixture in popular culture, appearing in numerous films, television shows, and books, most famously in the Jurassic Park series. Its status as a top predator and its distinctive appearance have cemented its reputation as a king of the dinosaurs.

See Also

• Dinosaur
• Cretaceous–Paleogene extinction event
• Paleontology
• Theropoda