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

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That's 800 million fewer than a previous estimate suggested.

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1.7 Billion T-Rexes Roamed the Earth Before Going Extinct

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Dinosaurs: Billions of T-Rex once roamed the Earth, scientists say

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Up to 1.7 billion T. rex dinosaurs lived on Earth, a new study found. But scientists aren't sure where all the bones went.

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New research bites into old Jurassic era T-rex population estimates