DEAGOSTINI / UIG / SCIENCE PHOTO LIBRARY DEAGOSTINI / UIG / SCIENCE PHOTO LIBRARY
Arrhinoceratops dinosaurs fighting. Computer illustration of two Arrhinoceratops sp. dinosaurs fighting. These herbivorous ceratopsid dinosaurs lived during the Late Cretaceous period (around 100 to 66 million years ago), in what is now Canada.
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