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Tyrannosaurus rex (T. rex)
Meet the King of the Dinosaurs!
Pronounced: tie-RAN-oh-SORE-us recks
Meaning: “tyrant lizard king”
Time Period: Late Cretaceous (about 68–66 million years ago)
Diet: Carnivore (meat-eater)
Where Found: Western North America
Length: about 40 feet (12 meters)
Weight: up to 9 tons
Tyrannosaurus rex, often called T. rex, is one of the most famous dinosaurs of all time and one of the largest meat-eating dinosaur species ever discovered. With its huge head, powerful jaws, and tiny arms, this predator ruled the land at the end of the Age of Dinosaurs.
Among all dinosaurs, T. rex is known for its enormous bite force and sharp, banana-shaped teeth that could crush bone.
What Made Triceratops Special Among Dinosaurs?
A Massive Biting Machine
T. rex had one of the strongest bites of any land animal in history. This dinosaur could crack bones to reach nutritious marrow inside, making it one of the most powerful predators among the dinosaurs.
Small Arms, Big Power
Even though its arms were short, they were strong and muscular. Scientists think these arms helped this dinosaur hold onto prey or help it stand up after resting.
Great Eyesight and Smell
T. rex had forward-facing eyes, giving it excellent depth perception. Its strong sense of smell helped this dinosaur find food from far away.
T. rex Fun Facts
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Tyrannosaurus rex means “tyrant lizard king,” and it truly lived up to its name among the dinosaurs.
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A T. rex tooth could be over 12 inches long, about the size of a banana.
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Young T. rex dinosaurs were slimmer and faster than adults and changed shape as they grew.
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T. rex is one of the last non-avian dinosaurs known before the mass extinction
T. rex FAQ (Frequently Asked Questions)
Was T. rex really the biggest meat-eating dinosaur?
T. rex was one of the largest carnivorous dinosaurs, though some other meat-eating dinosaurs may have been similar in size.
Did T. rex hunt or scavenge?
Most scientists think T. rex did both. This dinosaur could hunt live prey and also eat animals that were already dead.
What did T. rex eat?
T. rex ate plant-eating dinosaurs such as Triceratops and Edmontosaurus.
How fast could T. rex run?
This heavy dinosaur probably moved at a steady pace rather than sprinting fast like smaller dinosaurs.
Did T. rex have feathers?
Some relatives of T. rex had feathers, but adult T. rex likely had mostly scaly skin, possibly with a few simple feathers.
Why T. rex Matters in Dinosaur Science
Tyrannosaurus rex is one of the most important dinosaurs for understanding how giant meat-eating dinosaurs lived and hunted. Because scientists have found many T. rex fossils, this dinosaur helps researchers study growth, senses, and behavior in large predators.
Among all dinosaurs, T. rex remains one of the most popular and recognizable. It represents the power and mystery of the Age of Dinosaurs and continues to be one of the most exciting dinosaurs to learn about in museums, books, and classrooms.