![]() They probably hunted Hadrosaurs and Triceratops. When Tyrannosaurus rex hit around the age of 14 its body size would increase rapidly, putting on around 600kg (1300lb) a year over the next 4 years. ![]() Tyrannosaurus rex measured up to 13m (42ft) in length, 4m (13ft) at the hip and could weigh up to 7 tons! The skull of a Tyrannosaurus rex alone measured up to 1.5m (5ft) long.Even more terrifying was its mouth full of 8 inch (20cm) teeth - long and sharp, like knives. This would have helped it hunt better! Large parts of its brain helped its vision and smell - it may have even had telescopic vision. Rex had quite a large brain for a dinosaur. Tyrannosaurus rex lived in an area of the Earth that now makes up western North America. Tyrannosaurus rex is often abbreviated to T-Rex. ![]()
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