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Using the incredible wealth of fossil data and a modern ecological theory, researchers estimated population density for the extinct apex predator.
T Rex walked the earth slowly but was helped by its tail, Dutch
Discovery of closest relative of 'Tyrannosaurus rex' sheds light
8 Facts About the Fearsome T. Rex
A whopping 2.5 billion fully grown T. rexes walked the Earth in
Tyrannosaurs may have hunted together in packs like wolves
Dinosaur - Tyrannosaurus rex - The Australian Museum
Dinosaurs' walk the Earth in Anaheim – Orange County Register
Latest Research Shows That Around 2.5 Billion T. Rexes Once Roamed
Billions of T. rex likely roamed the Earth, paleontologists report