In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
People who sleep late have more mental stamina and can outperform early risers.
33
The average person falls asleep in seven minutes.
115
Cows can sleep standing up, but they can only dream lying down.
745
You burn more calories sleeping than you do watching television.
348