Bats sleep 18-20 hours per day.
5
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29
Honeybees never sleep.
276
Dieters who sleep more take off more fat that those who sleep less.
159
Cows can sleep standing up, but they can only dream lying down.
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