Study: 2.5 billion T. rex used to roam the Earth, but not all at once



"That’s a lot of jaws," said study lead author Charles Marshall, director of the University of California Museum of Paleontology. "That’s a lot of teeth. That’s a lot of claws."


FILE - Mr. Rex, one of the two famous Cabazon Dinosaurs, wears a tuxedo as part of a transformation for Valentines Day in Cabazon on Wednesday, Jan. 27, 2021. (Watchara Phomicinda/MediaNews Group/The Press-Enterprise via Getty Images)

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"Probably like a lot of people, I literally did a double-take to make sure that my eyes hadn’t deceived me when I first read that 2.5 billion T. rexes have ever lived," said Macalester College paleobiologist Kristi Curry Rogers, who wasn’t part of the study.


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The science about the biggest land-living carnivores of all time is important, "but the truth, as I see it, is that this kind of thing is just very cool," said Purdue University geology professor James Farlow.

Storyful contributed to this report.