In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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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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If you hold farts in during the day, they'll just come out when you sleep.
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The strangers in your dreams are actually people that you've seen in real life.
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Sleeping on the job is acceptable in Japan. It is viewed as exhaustion from working hard. Some people fake it to look committed to their job.
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Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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47% of people have a nightmare at least once a month.
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