Iguanodon skull. Illustration of a cross-section through an Iguanodon skull and jaw bones, showing the distinctive appearance and angled meshing of the chisel-like teeth (white). This structure suggests that a characteristic chewing action (blue arrows) was used when eating its plant food. Iguanodon was one of the most widespread dinosaurs, and fossils have been found in many regions, including Europe and North America. It was a herbivorous dinosaur that grew to a length of around ten metres, and stood about five metres tall. It lived from around 140 to 110 million years ago, in the Early Cretaceous.
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