Hyoid bone

An Upper Cretaceous confrontation between an adult Nanutyrnus (left) and two juvenile Tyrannosaurus rex (T. rex), as a semi-adolescent T. rex watches from a distance. The scene resembles a sort of “overture” to the famous T. rex trio on display in the Jane G. Pisano Dinosaur Hall at NHMLAC. Credit: Jorge Gonzalez

Scientists confirm: Nanotyrannus was a fully grown adult — not a T. rex cub

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The study also sheds light on how large tyrannosaurs rapidly evolved into enormous apex predators at the top of the food web.
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