Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Termites work 24 hours per day and they do not sleep.
57
Dieters who sleep more take off more fat that those who sleep less.
159
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Cows can sleep standing up, but they can only dream lying down.
745