The higher someone’s I.Q. the more likely they are to be sleep deprived.
29
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
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
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
Lack of water is the #1 trigger of daytime fatigue.
148
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
Cows can sleep standing up, but they can only dream lying down.
745