Bats sleep 18-20 hours per day.
5
The average person falls asleep in seven minutes.
115
Dieters who sleep more take off more fat that those who sleep less.
159
Honeybees never sleep.
276
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22