One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
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
The strangers in your dreams are actually people that you've seen in real life.
50
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240