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Researchers discover new tyrannosaur species in ‘duelling dinosaurs’ fossil

Analysis of Montana fossils shows the battling predator was a fully grown Nanotyrannus, not a young T rexThe fossilised remains of two dinosaurs locked in combat have unleashed a fresh drama, suggesting diminutive specimens thought to be Tyrannosaurus rex teenagers could instead be separate, smaller species.The “duelling dinosaurs” fossil, which reveals a triceratops in battle with a medium-sized tyrannosaur, was unearthed in Montana by commercial fossil hunters in 2006 and dates to shortly before the asteroid strike that ended the reign of the dinosaurs 66m years ago. Continue reading...

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