The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
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The harder you concentrate on falling asleep, the less likely you are to fall asleep.
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Those who get out of bed by 7am are more likely to be thinner and happier.
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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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Sea otters hold hands while sleeping so they don’t drift away from each other.
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