The human brain is more active during sleep than during the day.
28
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
Cows can sleep standing up, but they can only dream lying down.
745
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
You forget 90% of your dreams.
256
Those who get out of bed by 7am are more likely to be thinner and happier.
20
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13