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09 December 2025 EN sciencedaily

This rare bone finally settles the Nanotyrannus mystery

bone growth museum fossil specimen Nanotyrannus Tyrannosaurus discovery

Scientists have confirmed that Nanotyrannus was a mature species, not a young T. rex. A microscopic look at its hyoid bone provided the key evidence, matching growth signals seen in known T. rex specimens. This discovery suggests a richer, more competitive tyrannosaur ecosystem than previously believed. It also highlights how museum fossils and cutting-edge analysis can rewrite prehistoric history.

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