47% of people have a nightmare at least once a month.
186
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
People who sleep late have more mental stamina and can outperform early risers.
33
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
The strangers in your dreams are actually people that you've seen in real life.
50
Lack of water is the #1 trigger of daytime fatigue.
148
You forget 90% of your dreams.
256
Termites work 24 hours per day and they do not sleep.
57