In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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The strangers in your dreams are actually people that you've seen in real life.
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44% of kids watch television before they go to sleep.
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Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
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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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