Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
You burn more calories sleeping than you do watching television.
348
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
Termites work 24 hours per day and they do not sleep.
57