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Iguanodon is now known to be a plant-eating dinosaur that lived during the early Cretaceous period, about 135 to 125 million years ago. It was around 30 feet (9.1 meters) long, and lived around the world: fossils have been found in many countries including Belgium, England, Germany, Mongolia, North Africa, and the USA.
When Gideon Mantell first attempted a restoration in the 1820s, he only had very limited information and partial skeletons to work from, and incorrectly thought that Iguanodon's spiked horn was on the animal's snout. However, we now know that a conical horn was in fact attached to the thumb on each hand, and perpendicular to the other fingers. This spike may have been used for defense or for obtaining food.
Footprints of Iguanodon have been found preserved in the rocks of southern England, and from these were know the Iguanadon walked upright and travelled in herds. Footprints, but no skeletons as yet (as of the time of writing), have also been found in South America, and in Spitzbergen Island (in the Arctic Circle) which show that Iguanodon must have been very widespread.
Iguanodon was a herbivore (plant-eater) that lived from 135 to 125 million years ago
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