In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
Cows can sleep standing up, but they can only dream lying down.
745
47% of people have a nightmare at least once a month.
186
Lack of water is the #1 trigger of daytime fatigue.
148
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
You burn more calories sleeping than you do watching television.
348