The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
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One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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The average cat sleeps about 2/3 of the day.
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The strangers in your dreams are actually people that you've seen in real life.
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The human brain is more active during sleep than during the day.
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Those who get out of bed by 7am are more likely to be thinner and happier.
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Cows can sleep standing up, but they can only dream lying down.
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The harder you concentrate on falling asleep, the less likely you are to fall asleep.
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