Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
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Ants have tiny magnetic compasses in their antennae which help them navigate.
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The oldest creature ever found was Ming the clam at an admirable 507 years old.
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Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
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Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
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Jellyfish as a species are actually older than dinosaurs and sharks.
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