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Scientists thought this fossil was a teen T. rex. Turns out it's a new tyrannosaur

Scientists thought this fossil was a teen T. rex. Turns out it's a new tyrannosaur
Update: 2025-10-30
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A new look at the "Dueling Dinosaurs" fossil reveals that Tyrannosaurus rex was not the only tyrannosaur roaming western North America during the late Cretaceous period.
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