The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
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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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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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A new parent will lose about 1055.6 hours of sleep in the first year of their child's life - almost 44 days!
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If you hold farts in during the day, they'll just come out when you sleep.
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Those who get out of bed by 7am are more likely to be thinner and happier.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
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