A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
If you hold farts in during the day, they'll just come out when you sleep.
16
Termites work 24 hours per day and they do not sleep.
57