Cows can sleep standing up, but they can only dream lying down.
745
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
Dieters who sleep more take off more fat that those who sleep less.
159
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
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
The human brain is more active during sleep than during the day.
28