The average cat sleeps about 2/3 of the day.
203
The human brain is more active during sleep than during the day.
28
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
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