The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
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People who sleep late have more mental stamina and can outperform early risers.
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Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
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Cows can sleep standing up, but they can only dream lying down.
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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 average cat sleeps about 2/3 of the day.
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