How many T. rexes were there? Billions.

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.

New dinosaur was more dangerous than Tyrannosaurus Rex - Deseret News

Total T. Rex Population During Species' Existence Was 2.5 Billion

New Study Reveals Surprising Tyrannosaurus Rex Population and Lifespan

Researchers now have an estimate for just how many T. rex once roamed Earth

Like Godzilla, but actually real': study shows T. rex numbered 2.5 billion

About 2.5 billion T. Rex roamed Earth but not at once

A total of some 2.5 billion T. rex roamed the Earth, study finds

Billions of T. rex existed on Earth – DW – 04/16/2021

Bold theory' that Tyrannosaurus rex is 3 species gets stomped to pieces