Studies show that the colder the room you sleep in, the more likely you are to have a bad dream.
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Those who get out of bed by 7am are more likely to be thinner and happier.
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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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In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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A new parent will lose about 1055.6 hours of sleep in the first year of their child's life - almost 44 days!
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The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
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