Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Studies show that the colder the room you sleep in, the more likely you are to have a bad dream.
28
Honeybees never sleep.
276
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Dieters who sleep more take off more fat that those who sleep less.
159
47% of people have a nightmare at least once a month.
186