In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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You can reschedule your sleeping pattern by not eating 12-16 hours before you want to be awake. Upon eating after this time period, your internal clock will reset to a new day, with the time of your first meal being interpreted as "morning".
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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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44% of kids watch television before they go to sleep.
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The average cat sleeps about 2/3 of the day.
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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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The strangers in your dreams are actually people that you've seen in real life.
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