In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
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Dieters who sleep more take off more fat that those who sleep less.
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People who sleep late have more mental stamina and can outperform early risers.
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The human brain is more active during sleep than during the day.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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