Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
Those who get out of bed by 7am are more likely to be thinner and happier.
20
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
Drinking watermelon juice before a workout helps reduce muscle soreness.
21
God is the only Simpsons character to have five fingers on each hand.
10
Sloths take two weeks to digest their food.
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