"Dysania" is the state of finding it hard getting up out of bed in the morning.
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In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
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47% of people have a nightmare at least once a month.
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Honeybees never sleep.
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Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
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You burn more calories sleeping than you do watching television.
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