Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
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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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Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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Sharks, like other fish, have their reproductive organs in their chests.
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Lurch, a Watusi bull, had the largest horns in the world.
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