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That's 800 million fewer than a previous estimate suggested.
About 1.7 Billion T. Rex Dinosaurs Stalked the Earth Before Their Extinction
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
The Maximum Number Of T. Rex To Ever Walk The Earth Was 1.7 Billion, t rex
How Many Tyrannosaurus Rex Walked the Earth?
Footprints show some two-legged dinosaurs were agile
Tyrannosaurus rex, Prehistoric Planet Wiki
How many T. rexes ever lived? If you think a billion, go higher
Allosaurus vs T-Rex: Who Would Win the Battle? - Gage Beasley Prehistoric
Tyrannosaurus rex, Prehistoric Planet Wiki
