How many Tyrannosaurus rexes roamed North America during the Cretaceous period? That’s a question Charles Marshall pestered his paleontologist colleagues with for years until he finally teamed up with his students to find an answer.
How many T. rexes were there? Billions.
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Like Godzilla, but actually real': study shows T. rex numbered 2.5 billion
1.7 billion Tyrannosaurus rexes walked the Earth before going extinct, new study estimates
How Many Tyrannosaurus Rexes Ever Lived on Earth? Here's a New Clue. - The New York Times
A whopping 2.5 billion fully grown T. rexes walked the Earth in the course of the species' existence, paleontologists found
Absolute abundance and preservation rate of Tyrannosaurus rex
Tyrannosaurus rex, Jurassic Park Wiki
Prehistoric Planet on Instagram: Life finds a way. 🦖 It's estimate around 20,000 T. rex were alive at any given time during their existence as a species. Image credit: Orla/Shutterstock.com A new
How many T. rex ever existed? Calculation of dinosaur's abundance offers an answer
How many T. rexes were there? Billions.
An estimated 2.5 billion Tyrannosaurus rexes lived and died on Earth •
Billions of T. rexes walked on North America during the Age of the Dinosaurs
Almost 2 Billion T. Rexes Once Stomped the Earth