How many T rex were there? Billions, it turns out msn.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from msn.com Daily Mail and Mail on Sunday newspapers.
Tyrannosaurus rex. Their name means tyrant lizard king and as far as popular culture goes, they certainly ruled the dinosaurs. But just how many were there?
According to experts from California, the answer is a whopping 2.5 billion of the beasts over the 2.5 million years they roamed North America in the Late Cretaceous.
Around 20,000 adult T. rexes were probably alive at any given point during the species existence give or take a factor of ten, the researchers have estimated.
T. rex along with the rest of the dinosaurs went extinct in the wake of a devastating asteroid strike on the Earth some 66 million years ago.
Dinosaurs: Billions of T-Rex once roamed the Earth, scientists say azcentral.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from azcentral.com Daily Mail and Mail on Sunday newspapers.
Study: 2.5 billion T. rex roamed Earth, but not all at once
This study gives first-of-its-kind number
Seth Borenstein
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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.
Study: 2.5 billion T. rex roamed Earth, but not all at once
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SETH BORENSTEIN, AP Science Writer
April 15, 2021
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FILE - 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.Sven Kaestner/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.