The strangers in your dreams are actually people that you've seen in real life.
50
Honeybees never sleep.
276
47% of people have a nightmare at least once a month.
186
People who sleep late have more mental stamina and can outperform early risers.
33
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212