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That's 800 million fewer than a previous estimate suggested.
The Maximum Number Of T. Rex To Ever Walk The Earth Was 1.7 Billion, t rex
Tyrannosaurus rex, Prehistoric Planet Wiki
Montana T. rex to arrive at Smithsonian in April
How large would a T. rex be if a person's height barely reached its ankle? - Quora
Lifelike dinosaurs now among the creatures at Wildlife Safari Park
Are scientists trying to bring back the T-Rex? - Quora
Allosaurus vs T-Rex: Who Would Win the Battle? - Gage Beasley Prehistoric
The Maximum Number Of T. Rex To Ever Walk The Earth Was 1.7 Billion, rex
The Maximum Number Of T. Rex To Ever Walk The Earth Was 1.7 Billion, rex
New study says 1.7 billion T-Rexes roamed the earth before going extinct
Study: 2.5 billion T. rex roamed Earth, but not all at once
Tyrannosaurus rex, Prehistoric Planet Wiki
1.7 billion Roaring T-Rex Titans Roamed Prehistoric Earth, Stunning Study Reveals - BPNRC
Tyrannosaurus, We're Back A Dinosaur's Story Wiki
The Total Number Of T-Rex That Ever Walked The Earth Is 2.5 Billion