Paleontologists Stunning Conclusion: 2.5 Billion T. Rexes Roamed North America Over the Cretaceous Period

Analysis of what's known about the dinosaur leads to conclusion there were 2.5 billion over time. How many Tyrannosaurus rexes roamed North America during the Cretaceous period? That's a question Charles Marshall pestered his paleontologist colleagues with for years until he finally teamed up

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More than 2.5BILLION T-Rexes walked Earth before dinosaurs died

Study: 2.5 billion T. rex roamed Earth, but not all at once

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Study finds about 2.5 billion T. Rex roamed Earth but not at once

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Number of T-rexes that lived in North America could have been in

Billions of T. rexes walked on North America during the Age of the

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Billions of T.rexes roamed North America in the Cretaceous, study

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