Parasaurolophus dinosaurs, illustration
Parasaurolophus dinosaurs, illustration. Parasaurolophus was a hadrosaurid or duck-billed dinosaur. It lived in North America during the Upper Cretaceous period, 75-65 million years ago. It was a herbivore that inhabited grassy plains. Parasaurolophus reached up to 10 metres in length and weighed up to two tonnes., by ROGER HARRIS/SCIENCE PHOTO LIBRARY
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