Cows can sleep standing up, but they can only dream lying down.
745
Those who get out of bed by 7am are more likely to be thinner and happier.
20
Bats sleep 18-20 hours per day.
5
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
47% of people have a nightmare at least once a month.
186
Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15