Tyrannosaurus Rex
A new study has settled a long-standing debate by confirming that Nanotyrannus was a fully grown dinosaur species separate from Tyrannosaurus rex. Researchers analyzed the hyoid bone of the Nanotyrannus holotype, revealing maturity signals that distinguish it from juvenile T. rex specimens. This finding suggests a more diverse and competitive tyrannosaur ecosystem in Late Cretaceous North America.
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A new analysis of a fossil from Montana's Dueling Dinosaurs site has confirmed that Nanotyrannus lancensis was a mature species, not a juvenile Tyrannosaurus rex. This discovery challenges decades of paleontological assumptions about tyrannosaur growth and diversity. Published in Nature, the research reveals greater predator variety in the late Cretaceous period.