The human brain is more active during sleep than during the day.
28
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
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
People who sleep late have more mental stamina and can outperform early risers.
33
Those who get out of bed by 7am are more likely to be thinner and happier.
20
44% of kids watch television before they go to sleep.
106
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
Dieters who sleep more take off more fat that those who sleep less.
159