In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
If you hold farts in during the day, they'll just come out when you sleep.
16
Studies show that the colder the room you sleep in, the more likely you are to have a bad dream.
28
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Cows can sleep standing up, but they can only dream lying down.
745