If you hold farts in during the day, they'll just come out when you sleep.
16
The human brain is more active during sleep than during the day.
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Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12