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horned dinosaur

Reconstruction of a Lokiceratops rangiformis being surprised by a crocodilian in the 78-million-year-old swamps that would have existed in what is now northern Montana. Andrey Atuchin/Museum of Evolution hide caption

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Andrey Atuchin/Museum of Evolution

Scientists have identified a fossil of an herbivorous dinosaur, Psittacosaurus, being bitten by a mammal, Repenomamus. Gang Han hide caption

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Gang Han

This fossil of a mammal biting a dinosaur captures a death battle's final moments

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Scientists in Canada have diagnosed malignant cancer for the first time in a dinosaur, a Centrosaurus apertus from 76 to 77 million years ago. Sergey Krasovskiy/Stocktrek Images/Getty Images hide caption

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Sergey Krasovskiy/Stocktrek Images/Getty Images

New Research Shows Dinosaurs Suffered From Malignant Cancer, Too

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Life reconstruction of Wendiceratops pinhorn. Danielle Dufault/PLOS ONE hide caption

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Danielle Dufault/PLOS ONE

Scientists Discover One Of The Oldest Horned Dinosaurs

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