How many T. rexes were there? Billions.

Over approximately 2.5 million years, North America likely hosted 2.5 billion Tyrannosaurus rexes, a minuscule proportion of which have been dug up and studied by paleontologists, according to a UC Berkeley study. (Image by Julius Csotonyi , courtesy

New study says 1.7 billion T-Rexes roamed the earth before going extinct

Did you know how many T. Rexes were there on Earth ?

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

1.7 Billion T. Rexes Lived on Earth. Where Are All the Bones?

Why is T. rex everyone's favorite dinosaur? Aren't there like a billion cooler dinosaurs? - Quora

Tyrannosaurs may have hunted in packs like wolves, new research has found, Dinosaurs

T. Rex Wasn't All Brawn. It Had a Brain Comparable to a Primate

One of the Most Complete T. Rex Skulls Ever Found May Fetch $20 Million at a Single-Lot Sale at Sotheby's

Absolute abundance and preservation rate of Tyrannosaurus rex

Research Reveals 2.5 Billion T. Rexes Once Inhabited Earth

Billions' of Tyrannosaurus rexes said to have walked the Earth in all of history - National