Cows can sleep standing up, but they can only dream lying down.
745
Studies show that the colder the room you sleep in, the more likely you are to have a bad dream.
28
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
Termites work 24 hours per day and they do not sleep.
57
Honeybees never sleep.
276