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

Billions of T. rex existed on Earth – DW – 04/16/2021

Research Reveals 2.5 Billion T. Rexes Once Inhabited Earth

Rare T-Rex skeleton to go under the hammer in Switzerland

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

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

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

Why T. rex has tiny arms University of California

65 Million-Year-Old T-Rex From Wyoming To Be Auctioned, Could Fetch $9 Million

2.5 billion T. rex roamed Earth, but not all at once, study finds