Stegosaurus

Classification: Reptiles, ornithischia

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Body length: 9 m

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Body weight: 3 t

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Epoch: Late Jurassic

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Locations: North America

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Stegosaurus had 17 broad, upright plates on its back. The purpose of these plates remains unclear. Stegosaurus also had spikes at the end of its flexible tail.

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These spikes were up to 1.5 m high, poking out of the sides of the tail, protecting stegosaurus from predators. This dinosaur was a herbivore, feeding only on plants.

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Of course, it had to eat lots of low calorie plants to maintain its body and did that using its toothless beak. Its small brain was of a size of a nut.