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

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

Billions of Tyrannosaurus rexes once roamed earth, study shows

Tyrannosaurus rex, Prehistoric Planet Wiki

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

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

How many T. rexes were there? Billions.

Teen angst? T-Rex, other large dinosaurs out-competed smaller rival species, study finds-Tech News , Firstpost

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

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

1.7 Billion T-Rexes Roamed the Earth Before Going Extinct

New Study Says T. rex Might've Been 70% Larger Than Existing Fossils Suggest

New Study Reveals Surprising Tyrannosaurus Rex Population and Lifespan

T-rex reigns as king of dinosaurs

An estimated 2.5 billion Tyrannosaurus rexes lived and died on Earth •