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
The human brain is more active during sleep than during the day.
28
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
You can reschedule your sleeping pattern by not eating 12-16 hours before you want to be awake. Upon eating after this time period, your internal clock will reset to a new day, with the time of your first meal being interpreted as "morning".
11
Dieters who sleep more take off more fat that those who sleep less.
159
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
47% of people have a nightmare at least once a month.
186
If you hold farts in during the day, they'll just come out when you sleep.
16