A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
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Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
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The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
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The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
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Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
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