Tyrannosaurus Rex Facts

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Tyrannosaurus Rex Facts

Here are some facts about Tyrannosaurus Rex:
  1. Tyrannosaurus rex was a species of dinosaur (for more information see Tyrannosaurus Classification).

  2. Only one species of Tyrannosaurus is currently known: However a number of related types of dinosaurs, some of which probably lived similar lifestyles, are also known.

  3. Tyrannosaurus rex was a carnivore (ate meat). However it is not clear whether it was an active predator, hunting its prey itself, or a scavenger, feeding on carcasses killed by other dinosaurs.

    • Some scientists argue that is was an active predator. Among other things, they point to the largest areas of its brain devoted to smell and vision, both of which would have been useful for hunting. Additionally, these scientists note that Tyrannosaurus rex had forward-facing eyes, allowing it see things with both eyes together (known as "binocular vision"), and judge distances well - a common characteristic of active predators.

    • But other scientists argue that is was probably relatively slow-moving and therefore a scavenger.

  4. Tyrannosaurus rex lived in the late Cretaceous period, between about 67 million and 65 million years ago. It was one of the dinosaurs which died out during the K-T Extinction - the mass extinction which marked the end of the period in which dinosaurs lived.

  5. Tyrannosaurus rex lived in North America and Asia.

  6. Tyrannosaurus rex was huge. An average adult Tyrannosaurus rex was sized about 40 feet (12.3 meters) long, about 20 feet (6.1 meters) tall, and weighed around 7½ tons. Some adults were even larger - the largest currently known is 42 feet (12.8 meters) long.

  7. Despite its huge size, Tyrannosaurus rex was not the largest dinosaur - it was not even the largest carnivorous (meat-eating) dinosaur:

  8. Tyrannosaurus was discovered by Barnum Brown in 1902 who found its fossils in Montana.

  9. The name "Tyrannosaurus rex" was chosen Henry Fairfield Osborn in 1905. The name "Tyrannosaurus rex", like most scientific names, is derived from ancient Greek - it means "tyrant king lizard".

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