Y.DEROME,PUBLIPHOTO DIFFUSION / SCIENCE PHOTO LIBRARY Y.DEROME,PUBLIPHOTO DIFFUSION / SCIENCE PHOTO LIBRARY
Chasmosaurus dinosaur skeleton on display in a museum. This genus of dinosaur existed in the Upper Cretaceous Period (from around 145.5 million years ago to around 65.5 million years ago) of North America. Photographed at the Royal Tyrrell Museum, Alberta, Canada.
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