The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
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The human brain is more active during sleep than during the day.
28
The average cat sleeps about 2/3 of the day.
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You burn more calories sleeping than you do watching television.
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Honeybees never sleep.
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Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
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