DEAGOSTINI / UIG / SCIENCE PHOTO LIBRARY DEAGOSTINI / UIG / SCIENCE PHOTO LIBRARY
Cretaceous hadrosaurs. Computer illustration of the heads of Parasaurolophus sp. (top) and Edmontosaurus sp. (bottom left and right) dinosaurs. These ornithopod hadrosaurs lived during the Late Cretaceous period (around 100 to 66 million years ago), in what is now North America:.
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