Those who get out of bed by 7am are more likely to be thinner and happier.
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The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
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People who sleep late have more mental stamina and can outperform early risers.
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Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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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.
194
Sea otters hold hands while sleeping so they don’t drift away from each other.
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The human brain is more active during sleep than during the day.
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