Tyrannosaurus Facts
Pronunciation: tie-RAN-oh-SORE-us
Name meaning: Tyrant Lizard
| Diet | Carnivore |
| Height | 4m |
| Length | 12m |
| Weight | 8 tonnes |
| Speed | 25 km/h |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Theropod |
| Location | North America |
Tyrannosaurus rex, often called T. rex, was one of the largest and most fearsome theropod dinosaurs ever to walk the Earth. This massive predator lived during the Late Cretaceous period, from 68 to 66 million years ago, making it one of the very last dinosaurs before the great extinction event that ended the age of dinosaurs.
Standing 4 metres tall at the hip and measuring up to 12 metres in length, Tyrannosaurus was built like the ultimate predator. Its enormous skull, which could reach 1.5 metres long, housed powerful jaw muscles and razor-sharp teeth up to 20 centimetres long. Despite its fearsome reputation, T. rex had surprisingly small arms with only two clawed fingers, though these were incredibly strong and muscular.
Tyrannosaurus roamed the forests and river plains of what is now western North America, which was then an island continent called Laramidia. As an apex predator, it hunted large herbivorous dinosaurs like Triceratops and Edmontosaurus, using its powerful bite force of over 12,800 pounds per square inch - stronger than any land animal that has ever lived.
Recent discoveries have revealed that Tyrannosaurus may have been more intelligent and social than previously thought, with some evidence suggesting they might have hunted in family groups and cared for their young in nests.
What made Tyrannosaurus distinctive?
Tyrannosaurus had an enormous skull with powerful jaws filled with banana-sized teeth, tiny but muscular two-fingered arms, and a long tail that balanced its massive body. Its legs were built like pillars to support its tremendous weight, and it had forward-facing eyes that gave it excellent depth perception for hunting.
Behaviour
Tyrannosaurus was likely both an active hunter and an opportunistic scavenger, using its excellent eyesight and sense of smell to locate prey. Evidence suggests it may have been more social than once believed, possibly living and hunting in family groups, and it definitely cared for its young in ground nests.
Tyrannosaurus in Popular Culture
Tyrannosaurus rex is arguably the most famous dinosaur in popular culture, starring as the main antagonist in Jurassic Park and appearing in countless films, documentaries, books, and video games as the ultimate prehistoric predator.
Discovery
Tyrannosaurus was first described by Henry Fairfield Osborn in 1905. The original fossils were discovered at Hell Creek Formation, Montana, USA.
Tyrannosaurus FAQ
What did Tyrannosaurus eat?
Tyrannosaurus was a carnivore that fed on large herbivorous dinosaurs like Triceratops, Edmontosaurus, and
Ankylosaurus. It was both an active hunter and a scavenger, using its powerful bite to crush bones and access nutritious bone marrow. Its teeth were designed for gripping and tearing flesh rather than slicing like a knife.
How big was Tyrannosaurus?
Tyrannosaurus stood about 4 metres tall at the hip, measured up to 12 metres in total length, and weighed around 8 tonnes. This made it one of the largest land predators ever to exist, though some individuals may have been even larger based on recent fossil discoveries.
When did Tyrannosaurus live?
Tyrannosaurus lived during the
Late Cretaceous period, from approximately 68 to 66 million years ago. This means it was one of the very last dinosaur species before the mass extinction event that ended the Mesozoic Era.
Where was Tyrannosaurus found?
Tyrannosaurus fossils have been found throughout western North America, particularly in the states of Montana, North Dakota, South Dakota, Wyoming, and the provinces of Saskatchewan and Alberta in Canada. During the Cretaceous period, this region was an island continent called Laramidia.
How do you pronounce Tyrannosaurus?
Tyrannosaurus is pronounced 'tie-RAN-oh-SORE-us'. Many people simply call it 'T. rex' (TEE-rex) which refers specifically to the species Tyrannosaurus rex, the most famous member of the genus.
What does Tyrannosaurus mean?
Tyrannosaurus means 'tyrant lizard' in Greek. The full species name Tyrannosaurus rex means 'tyrant lizard king', which perfectly captures this dinosaur's role as the ultimate apex predator of its time.
How fast could Tyrannosaurus run?
Scientists estimate that Tyrannosaurus could reach speeds of up to 25 km/h, though this is debated. While not as fast as smaller theropods, this was still impressive for such a massive animal and would have been fast enough to chase down many of its prey species.
What type of dinosaur was Tyrannosaurus?
Tyrannosaurus was a theropod dinosaur, belonging to the family Tyrannosauridae. Theropods were bipedal, mostly carnivorous dinosaurs that included all the major predators of the Mesozoic Era.
Was Tyrannosaurus related to birds?
Yes, like all theropod dinosaurs, Tyrannosaurus was closely related to modern birds. Birds are actually living dinosaurs that evolved from small theropods. Recent evidence suggests that young Tyrannosaurus may have even had feathers, especially as juveniles.
How many Tyrannosaurus fossils have been found?
More than 50 Tyrannosaurus specimens have been discovered, making it one of the best-known large theropod dinosaurs. Famous specimens include 'Sue', 'Stan', and 'Jane'. However, only a handful are nearly complete skeletons, with most finds consisting of partial remains.
