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
If you hold farts in during the day, they'll just come out when you sleep.
16
Cows can sleep standing up, but they can only dream lying down.
745
Lack of water is the #1 trigger of daytime fatigue.
148
Dieters who sleep more take off more fat that those who sleep less.
159
You forget 90% of your dreams.
256
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15