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
You burn more calories sleeping than you do watching television.
348
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Sleeping on the job is acceptable in Japan. It is viewed as exhaustion from working hard. Some people fake it to look committed to their job.
57
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12