Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
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 record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
47% of people have a nightmare at least once a month.
186
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
The strangers in your dreams are actually people that you've seen in real life.
50