a controversial new study has found that the dino bones belong not to a young Tyrannosaurus rex but to a separate species: Nanotyrannus lancensis. In the decades since the first skull was ...

At first paleontologists classified it as a new dinosaur, Nanotyrannus lancensis, but it was later reinterpreted as a young Tyrannosaurus rex. However, its long arms and small size helped prove it ...

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