Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
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
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The average cat sleeps about 2/3 of the day.
203
The average person falls asleep in seven minutes.
115
Termites work 24 hours per day and they do not sleep.
57