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

A total of some 2.5 billion T. rex roamed the Earth, study finds

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Paleontologists Stunning Conclusion: 2.5 Billion T. Rexes Roamed

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2.5 Billion T. Rex Roamed Earth, but Not All at Once, Study Says

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