iguanodon

Classification: Reptiles, ornithischia, ornithopoda

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Body length: 10 m

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Body weight: 3 t

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Epoch: Early Cretaceous

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Locations: England, Belgium, Germany, North Africa, USA

Iguanodon was a dinosaur with a horny, toothless beak and tightly arranged maxillary teeth. Each of its arm had four fingers and a single spike in place of a thumb, which was perpendicular to other fingers.

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These spikes could have been used for defence or food extraction. Iguanodon had a flat, robust tail and three-fingered back legs with hoof-like nails.

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It was a herbivore, eating prehistorical plants with its strong, toothless beak.