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
Dieters who sleep more take off more fat that those who sleep less.
159
The human brain is more active during sleep than during the day.
28
You forget 90% of your dreams.
256
If you hold farts in during the day, they'll just come out when you sleep.
16
You burn more calories sleeping than you do watching television.
348
People who sleep late have more mental stamina and can outperform early risers.
33