Bats sleep 18-20 hours per day.
5
The strangers in your dreams are actually people that you've seen in real life.
50
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
You forget 90% of your dreams.
256
People who sleep late have more mental stamina and can outperform early risers.
33