In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Studies show that the colder the room you sleep in, the more likely you are to have a bad dream.
28
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
If you hold farts in during the day, they'll just come out when you sleep.
16
The average cat sleeps about 2/3 of the day.
203