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That's 800 million fewer than a previous estimate suggested.
Allosaurus - Wikipedia
Tyrannosaurus could have been 70% BIGGER THAN FOSSILS SUGGEST : r/Naturewasmetal
Was the T-Rex the ultimate apex predator or did it also have a predator? - Quora
New research bites into old Jurassic era T-rex population estimates
The Maximum Number Of T. Rex To Ever Walk The Earth Was 1.7 Billion, rex
Dinosaur Census! Estimated 1.7 Billion T. Rexes Walked the Earth
Tyrannosaurus rex, Prehistoric Planet Wiki
Tyrannosaurus, We're Back A Dinosaur's Story Wiki
The Maximum Number Of T. Rex To Ever Walk The Earth Was 1.7 Billion, rex