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
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
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
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
You forget 90% of your dreams.
256