Of all the Dinosaurs that Palaeontologists have discovered, the variants of the genus, Iguanodon, were probably the most successful and widespread ever to have lived. The first Igaunodon evolved around 140 MYA - the last finally becoming extinct 70-65 MYA. Though some say earlier, around 90-80 MYA, it is widely held that Iguandon diversified on a global scale, with a range of habitats, as well as sizes and quite possibly skin colour patterns. Iguandon, could well have witnessed the events that overcame the whole family of the Dinosaurs, 65 MYA. For what was probably over 75 Million Years, Iguandon, in some form or other, lived on Earth, feeding on the gradually changing vegetation across almost the entire span of the Cretaceous Period.