e-How: How to big was T-rex


T-rex or Tyrannosaurus was a large meat eating dinosaurs that lived during the late Cretaceous. Tyrannosaurus was amongst the largest meat eating dinosaurs that ever lived growing up to 39 ft (12 m) in length and up to 20 ft (6 m) in height and weighed between 5 to 7 tons (roughly the weight of an Elephant).

Tyrannosaurus walked heavily on its powerful hind legs. Tyrannosaurus had very short arms but were very strong and were tipped with very sharp two fingered claws. Tyrannosaurus main weapon were its immense powerful jaws armed with huge replaceable sharp teeth measuring anything up to 12 inches in length.

Tyrannosaurus belonged to a group of dinosaurs called the Tyrannosaurids. Other members of this family included Tarbosaurus, Nanotyrannus and Albetosaurus.

Tyrannosaurus would of probably preyed upon plant eating dinosaurs such as Triceratops favouring those who were too sick or too young to escape or defend themselves.


How big was a T-rex

Estimates suggest T-rex was was up to about 42 feet (12.8 m) long and about 15 to 20 feet (4.6 to 6 m) tall.

Tyrannosaurus image courtesy of science-resources.co.uk

Pronounced: tie-RAN-oh-SAW-rus

Name Means: "Tyrant Lizard"

Length: 39 feet (12 m)

Height: 13 feet (5 m)

Weight: 6 tons (6,000 kg)

Diet: Carnivore (Meat)

Time: Late Cretaceous - 65 million years ago

Habitat: Forests

Fossils Found: Asia, Western North America

Tyrannosaurus Size image courtesy of science-resources.co.uk


How fast was a T-rex

Scientist believe that a fully grown T-rex could reach speads of around 10-25 miles per hour (17-40 kph).

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