THE REX FACTOR
More than 2.5BILLION T-Rexes walked Earth before dinosaurs died out – and 20,000 lived at any one time
Chris Pollard
Updated: 15 Apr 2021, 19:42
BILLIONS of T-Rexes roamed the earth, new research has shown.
The giant meat-eating dinosaur - made famous in Jurassic Park - dominated the world during the Cretaceous period.
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Billions of T-Rexes roamed the Earth before the dinosaurs died outCredit: SWNS
Now scientists have calculated that 2.5billion T-Rexes lived and died during their reign, in a new study published in the journal Science.
Palaeontologist Steve Brusatte, author of bestselling The Rise and Fall of the Dinosaurs, said: If one bus-sized T-Rex biting down on you with the force of pickup truck isn’t terrifying enough, imagine that about 20,000 of them were probably out there stalking at any given time.
That s a lot of teeth : 2 5 billion T rex walked the earth, researchers find | Dinosaurs
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In this Tuesday, March 7, 2006 file photo, life-sized Tyrannosaurus rex models are unloaded for a dinosaur exhibition in Potsdam, Germany. A study released on Thursday, April 15, 2021 calculates that 2.5 billion Tyrannosaurus rex prowled North America over a couple million years or so, with maybe 20,000 at any given time.
AP
One Tyrannosaurus rex seems scary enough. Now picture 2.5 billion of them. That’s how many of the fierce dinosaur king probably roamed Earth over the course of a couple million years, a new study finds.
Using calculations based on body size, sexual maturity and the creatures’ energy needs, a team at the University of California, Berkeley figured out just how many T. rex lived over 127,000 generations, according to a study in Thursday’s journal Science. It’s a first-of-its-kind number, but just an estimate with a margin of error that is the size of a T. rex.