The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
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The human brain is more active during sleep than during the day.
28
Cows can sleep standing up, but they can only dream lying down.
745
47% of people have a nightmare at least once a month.
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You forget 90% of your dreams.
256