In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
Dieters who sleep more take off more fat that those who sleep less.
159
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
Lack of water is the #1 trigger of daytime fatigue.
148
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29