There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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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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Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
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People who sleep late have more mental stamina and can outperform early risers.
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Termites work 24 hours per day and they do not sleep.
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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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Cows can sleep standing up, but they can only dream lying down.
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