Honeybees never sleep.
276
People who sleep late have more mental stamina and can outperform early risers.
33
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
47% of people have a nightmare at least once a month.
186
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
You burn more calories sleeping than you do watching television.
348