Termites work 24 hours per day and they do not sleep.
57
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
The average person falls asleep in seven minutes.
115
Cows can sleep standing up, but they can only dream lying down.
745
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240