One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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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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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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Sea otters hold hands while sleeping so they don’t drift away from each other.
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In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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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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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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