Bats sleep 18-20 hours per day.
5
The average person falls asleep in seven minutes.
115
The human brain is more active during sleep than during the day.
28
Dieters who sleep more take off more fat that those who sleep less.
159
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
Cows can sleep standing up, but they can only dream lying down.
745