Sea otters hold hands while sleeping so they don’t drift away from each other.
104
The human brain is more active during sleep than during the day.
28
The strangers in your dreams are actually people that you've seen in real life.
50
Dieters who sleep more take off more fat that those who sleep less.
159
People who sleep late have more mental stamina and can outperform early risers.
33
47% of people have a nightmare at least once a month.
186
Cows can sleep standing up, but they can only dream lying down.
745