How many 'Tyrannosaurus rex' walked the Earth?

Using the incredible wealth of fossil data and a modern ecological theory, researchers estimated population density for the extinct apex predator.

T. Rex Discoveries Reveal How the Dinosaurs Hunted, Walked, and Grew

Two and a half billion T. rex dinosaurs once lived, study finds

Monster dinosaur T-rex may have actually been 70% bigger than we think - Mirror Online

Here's how scientists calculated how many T. Rexes lived on Earth

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

A bunch of T. rex walked the earth

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

Tyrannosaurs may have hunted together in packs like wolves

Posterazzi Tyrannosaurus Rex dinosaur observes a meteorite crashing into Earth Poster Print, (32 x 24): Posters & Prints

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