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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People who sleep late have more mental stamina and can outperform early risers.
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The average person falls asleep in seven minutes.
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A new baby usually deprives each of it's parents around 350-400 hours of sleep in the first year. That is one entire nights sleep per week, per parent.
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Lack of water is the #1 trigger of daytime fatigue.
148
Sea otters hold hands while sleeping so they don’t drift away from each other.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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