The strangers in your dreams are actually people that you've seen in real life.
50
Cows can sleep standing up, but they can only dream lying down.
745
The human brain is more active during sleep than during the day.
28
Those who get out of bed by 7am are more likely to be thinner and happier.
20
People who sleep late have more mental stamina and can outperform early risers.
33
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Dieters who sleep more take off more fat that those who sleep less.
159
Bats sleep 18-20 hours per day.
5