In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
Termites work 24 hours per day and they do not sleep.
57
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
Bats sleep 18-20 hours per day.
5
You forget 90% of your dreams.
256