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 Tyrannosaurus rexes once roamed earth, study shows

Tyrannosaurus rex, Prehistoric Planet Wiki

How many T. rexes were there? Billions.

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

Palaeontology: More than 2.5 BILLION T. Rexes roamed the Earth over their 2.5 million years

How many 'Tyrannosaurus rex' walked the Earth?

Study finds about 2.5 billion T. Rex roamed Earth but not at once: 'That's a lot of jaws

The Maximum Number Of T. Rex To Ever Walk The Earth Was 1.7 Billion

Why T. rex has tiny arms University of California

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

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

How Many T-Rexes Once Roamed the Earth? Maybe Billions

How many T. rex were there? Billions, it turns out

The Family Feud Behind a $32 Million T. Rex Named Stan - WSJ