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 estimates shocking number of T. rexes in Earth's history

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

Dinosaurs: Billions of T-Rex once roamed the Earth, scientists say

Paleontologists Stunning Conclusion: 2.5 Billion T. Rexes Roamed North America Over the Cretaceous Period

Tyrannosaurs may have hunted together in packs like wolves

Two-and-a-half billion T-Rex have roamed the earth - Scimex

Book Review: The Unleashing of Tyrannosaurus Rex

Tyrannosaurus Rex Likely Hunted in Packs - and There Were Billions of Them!

In All of Time, 2.5 Billion Tyrannosaurus Rexes Have Roamed Earth, Smart News

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

How many 'Tyrannosaurus rex' walked the Earth?

How many T. rexes were there? Billions.

T. rex skull fossil from South Dakota to be auctioned in NY for millions