47% of people have a nightmare at least once a month.
186
Cows can sleep standing up, but they can only dream lying down.
745
The human brain is more active during sleep than during the day.
28
You burn more calories sleeping than you do watching television.
348
Studies show that the colder the room you sleep in, the more likely you are to have a bad dream.
28
Honeybees never sleep.
276