Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
Cows can sleep standing up, but they can only dream lying down.
745
Lack of water is the #1 trigger of daytime fatigue.
148
Dieters who sleep more take off more fat that those who sleep less.
159
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13