The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
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One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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Honeybees never sleep.
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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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Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
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47% of people have a nightmare at least once a month.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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The average cat sleeps about 2/3 of the day.
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