In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
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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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Sea otters hold hands while sleeping so they don’t drift away from each other.
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The strangers in your dreams are actually people that you've seen in real life.
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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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