One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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A 42-foot sperm whale has about 7 tons of oil in it.
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Cats recognise the voice of their owner, but never evolved to care.
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Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
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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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Ants tend to survive in a microwave because they find the coolest spot and wait!
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