Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15
The strangers in your dreams are actually people that you've seen in real life.
50
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
Those who get out of bed by 7am are more likely to be thinner and happier.
20
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149