Only 1% of bacteria cause disease in humans!
2
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
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From the age of thirty, humans gradually begin to shrink in size.
1
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
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Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
A woman's sense of smell is most sensitive during ovulation.
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