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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The reindeer is the only mammal that can see UV light.
17
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!)
11
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
Cows can sleep standing up, but they can only dream lying down.
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