In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
The strangers in your dreams are actually people that you've seen in real life.
50
The average cat sleeps about 2/3 of the day.
203
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
You forget 90% of your dreams.
256
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
Honeybees never sleep.
276