How many 'Tyrannosaurus rex' walked the Earth?

Using the incredible wealth of fossil data and a modern ecological theory, researchers estimated population density for the extinct apex predator.

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National Geographic Kids™: T. Rex by Andrea Silen (Paperback

These dinosaurs had shorter arms than the T. rex

Billions of T. rex likely roamed the Earth, paleontologists report

A whopping 2.5 billion fully grown T. rexes walked the Earth in

WE NEED MORE TEETH – Sedgwick Museum of Earth Sciences Online

1.7 billion Tyrannosaurus rexes walked the Earth before going

Fewer T. rex walked the Earth than previous estimated, new study

10 Facts About Tyrannosaurus Rex, King of the Dinosaurs

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Why Dinosaurs Like T. Rex Evolved Tiny Little Arms - Science

Find the Safari Ltd® Wild Safari® Prehistoric World Tyrannosaurus