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
If you hold farts in during the day, they'll just come out when you sleep.
16
Dieters who sleep more take off more fat that those who sleep less.
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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.
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