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.
Dinosaurs: Billions of T-Rex once roamed the Earth, scientists say
The Family Feud Behind a $32 Million T. Rex Named Stan - WSJ
65 Million-Year-Old T-Rex From Wyoming To Be Auctioned, Could Fetch $9 Million
Bold theory' that Tyrannosaurus rex is 3 species gets stomped to pieces
Like Godzilla, but actually real': study shows T. rex numbered 2.5 billion - The Japan Times
Paleontologists Stunning Conclusion: 2.5 Billion T. Rexes Roamed North America Over the Cretaceous Period
What are some cool facts about the t-Rex : r/Dinosaurs
About 2.5 billion T. Rex roamed Earth but not at once
Researchers now have an estimate for just how many T. rex once roamed Earth
As many as 1.7 billion T-rexes once dominated the planet, finds new study - Interesting Engineering
Paleontologists Believe 2.5 Billion T. rex Roamed the Earth Over the Cretaceous Period
How many T. rexes were there? Billions., rex
Tyrannosaurus rex might be one species, not three, after all
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Like Godzilla, but actually real': study shows T. rex numbered 2.5 billion