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
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
Those who get out of bed by 7am are more likely to be thinner and happier.
20
Termites work 24 hours per day and they do not sleep.
57
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
The average person falls asleep in seven minutes.
115
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34