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New research claims that the T. rex population was much lower than scientists previously estimated, claiming 1.7 billion roamed our planet.
Tyrannosaur, Size, Species, & Facts
Experts find remains of unknown T-Rex dinosaur relatives in Morocco
In All of Time, 2.5 Billion Tyrannosaurus Rexes Have Roamed Earth, Smart News
Walk, Dont Run
Tyrannosaurus rex, Prehistoric Planet Wiki
Tyrannosaurus rex, Prehistoric Planet Wiki
Why the Tyrannosaurus rex was too big to run •
New Study Finds T. Rex Walked at a Slow Pace of Three Miles Per Hour, Smart News
T. rex's short arms may have lowered risk of bites during feeding frenzies
2.5 Billion T. Rex Roamed Earth, but Not All at Once, Study Says