ZoomDinosaurs.com Tyrannosaurus rex

Introduction Fact Sheet Skeleton When T. rex Lived What T. rex Ate Hunting, Fighting

Discovery and Naming of T. rex Fossils T. rex vs. Giganotosaurus Intelligence, Care of Young Running Disease in T. rex Q. and A.

T. rex Myths Extinction Classroom Activities and Printouts Classification T. rex Web Links

T. rex vs. Giganotosaurus Tyrannosaurus rex and Giganotosaurus carolini were two enormous meat-eaters. These two fierce predators never met! They were separated by millions of years of time and a shallow sea.

A Comparison of Giganotosaurus and T. rex

	GIGANOTOSAURUS carolinii	TYRANNOSAURUS rex
Picture
Skull length	6 feet (1.8 m)	5 feet (1.5 m)
Hands	3 fingers	larger, with 2 fingers
Height at hips	12 feet (3.7 m)	10 feet (3 m)
Length	45-47 feet (14.5 m)	40 feet (12 m)
Weight	about 8 tons	about 5 tons
Teeth	long, knife-like, serrated - slicing action	conical, serrated - crushing action
Brain size, shape	small, banana shaped	larger and wider
When they lived	about 100-95 million years ago	about 65 million years ago
Where they lived	South America	North America

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