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Study: About 2 5 billion T Rex roamed Earth but not at once

Study: 2.5 billion T. rex roamed Earth, but not all at once This study gives first-of-its-kind number Seth Borenstein Updated:  Tags:  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

Study: 2.5 billion T. rex roamed Earth, but not all at once Sign In SETH BORENSTEIN, AP Science Writer April 15, 2021 FacebookTwitterEmail 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.

How Many T Rexes Roamed Earth? Billions

Paleontologists relied on a new method of estimating extinct populations to peg the number of Tyrannosaurus rexes that terrorized Earth throughout the Cretaceous period at 2.5 billion. A cast of a T. rex skeleton on display outside the UC Museum of Paleontology at the University of California, Berkeley. The original, a nearly complete skeleton excavated in 1990 from the badlands of eastern Montana, is at the Museum of the Rockies in Bozeman, Montana. (Keegan Houser, UC Berkeley) (CN) A breakthrough new study has satisfied the long unanswered question of how many T. Rexes lived on Earth in their time, finding that approximately 2.5 billion roamed the Earth over the span of 2½ million years.

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