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
You forget 90% of your dreams.
256
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
Termites work 24 hours per day and they do not sleep.
57
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22