Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Termites work 24 hours per day and they do not sleep.
57
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
The strangers in your dreams are actually people that you've seen in real life.
50
The human brain is more active during sleep than during the day.
28
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240