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

2.5 Billion T. Rex Once Existed

Absolute abundance and preservation rate of Tyrannosaurus rex

Two and a half billion T. rex dinosaurs once lived, study finds

Billions of T.rex dinosaurs roamed North America, study shows

T. REX TALLY Simanaitis Says

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

How many T. rex ever existed? Calculation of dinosaur's abundance offers an answer

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

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

2.5 billion: That's how many T. rexes may have roamed the Earth over their 3-million-year reign - Genetic Literacy Project

T-rex reigns as king of dinosaurs

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