47% of people have a nightmare at least once a month.
186
People who sleep late have more mental stamina and can outperform early risers.
33
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
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