In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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"Dysania" is the state of finding it hard getting up out of bed in the morning.
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The harder you concentrate on falling asleep, the less likely you are to fall asleep.
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Cows can sleep standing up, but they can only dream lying down.
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People who sleep late have more mental stamina and can outperform early risers.
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Bats sleep 18-20 hours per day.
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Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
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If you hold farts in during the day, they'll just come out when you sleep.
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