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

In this illustration, a pack of <!-- raw HTML omitted -->Nanotyrannus<!-- raw HTML omitted --> attacks a juvenile <!-- raw HTML omitted -->T. rex. <!-- raw HTML omitted -->Scientists say a well-known fossil shows that there was more than one tyrannosaur species roaming the Earth. <!-- raw HTML omitted -->

A new look at the "Dueling Dinosaurs" fossil reveals that Tyrannosaurus rex was not the only tyrannosaur roaming the land.

(Image credit: Anthony Hutchings)

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