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.

Billions of Tyrannosaurus rexes once roamed earth, study shows

Tyrannosaurus rex, Jurassic Park Wiki

A whopping 2.5 billion fully grown T. rexes walked the Earth in the course of the species' existence, paleontologists found

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

Research Reveals 2.5 Billion T. Rexes Once Inhabited Earth

How many T. rexes were there? Billions.

That's a lot of teeth': 2.5 billion T rex walked the earth, researchers find, Dinosaurs

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

Tyrannosaurus rex might be one species, not three, after all

T. rex may have had lips like a modern lizard's

Horse-size T. rex probably not real, says dream-crushing study - CNET

SUE the T. rex - Field Museum

T. rex fossil sells for more than $5M at Zurich auction

Jurassic World: Dominion Extreme Damage T Rex Dinosaur Figure for