Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
The strangers in your dreams are actually people that you've seen in real life.
50
You forget 90% of your dreams.
256
You burn more calories sleeping than you do watching television.
348
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15