In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
Bats sleep 18-20 hours per day.
5
Honeybees never sleep.
276
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33
Cows can sleep standing up, but they can only dream lying down.
745
You forget 90% of your dreams.
256
Dieters who sleep more take off more fat that those who sleep less.
159
You burn more calories sleeping than you do watching television.
348