Sea otters hold hands while sleeping so they don’t drift away from each other.
104
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
The strangers in your dreams are actually people that you've seen in real life.
50
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
If you hold farts in during the day, they'll just come out when you sleep.
16
Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15