Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
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47% of people have a nightmare at least once a month.
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The strangers in your dreams are actually people that you've seen in real life.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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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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