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That's 800 million fewer than a previous estimate suggested.
Paleontologists find ancestor of T.Rex
Unraveling the Feathered Mystery: Did T-Rex Have Feathers? - Gage Beasley Prehistoric
The Maximum Number Of T. Rex To Ever Walk The Earth Was 1.7 Billion, rex
About 1.7 Billion T. Rex Dinosaurs Stalked the Earth Before Their Extinction
Dinosaur world presentation
National geographic - T Rex (Tyrannosaurus Rex) - New Documentary HD 2018
The Maximum Number Of T. Rex To Ever Walk The Earth Was 1.7 Billion, t rex
The Maximum Number Of T. Rex To Ever Walk The Earth Was 1.7 Billion, rex
How big was a T-rex in relative size compared to other animals such as an elephant, hippopotamus, rhinoceros, etc.? - Quora
How many 'Tyrannosaurus rex' walked the Earth?