In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
The average cat sleeps about 2/3 of the day.
203
You forget 90% of your dreams.
256
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
You burn more calories sleeping than you do watching television.
348
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212