2.5 billion T. rex roamed Earth, but not all at once, study finds
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The species roamed North America for about 1.2 million to 3.6 million years, meaning the T. rex population density was small at any one moment.
Earth was home to billions of T-rex over lakhs of generations
Tyrannosaurus rex population hit 2.5 billion, study finds
Billions of T.rex dinosaurs roamed North America, study shows
Earth was home to billions of T-rex over lakhs of generations
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There were 2.5 billion Tyrannosaurus rexes on Earth, study says
About 2.5 Billion T. Rex Dinosaurs Stomped Across The Earth's
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