A new baby usually deprives each of it's parents around 350-400 hours of sleep in the first year. That is one entire nights sleep per week, per parent.
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People who sleep late have more mental stamina and can outperform early risers.
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Honeybees never sleep.
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Cows can sleep standing up, but they can only dream lying down.
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One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
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Studies show that the colder the room you sleep in, the more likely you are to have a bad dream.
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