"Dysania" is the state of finding it hard getting up out of bed in the morning.
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47% of people have a nightmare at least once a month.
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Bats sleep 18-20 hours per day.
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Studies show that the colder the room you sleep in, the more likely you are to have a bad dream.
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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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Termites work 24 hours per day and they do not sleep.
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The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
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