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    16 Myths About The Human Body That You've Seen Over And Over Again, Even Though They're Not True

    MSG, swimming after eating, and going outside in the winter without a hat: all way less dangerous than you've been led to believe.

    1. That "tongue map" with specific regions for tasting sweet, salty, sour, and bitter is bogus.

    A tongue map

    2. Here's a fun fact to break the ice at parties: Urine is not sterile.

    3. Shaving your body hair won't make it grow back thicker or darker.

    A woman shaves her legs

    4. Fingernails and hair don't continue to grow after death.

    A woman's manicure

    5. Swallowed chewing gum doesn't stick around in your digestive system for seven years.

    6. Cracking your knuckles won't increase your chances of developing arthritis.

    7. Detox teas don't actually flush toxins out of your body (and detox outside of the context of "medical treatment of people with life-threatening drug addictions" is pretty much a myth).

    Tea with ginger, lemon, and honey

    8. Humans have more than five senses.

    The classical five senses

    9. Monosodium glutamate (aka MSG) isn't tied to negative health effects, and the so-called "Chinese restaurant syndrome" it supposedly causes is based on nothing more than an unscientific letter written to the New England Journal of Medicine in 1968.

    A spoonful of the white crystals of MSG

    10. You can't get warts by touching a toad or a frog (or any other type of amphibian, for that matter).

    a toad with warty looking skin

    11. The idea that humans only use 10% of their brain is "so wrong it is almost laughable."

    12. Not waiting 30 minutes or an hour after eating to go swimming doesn't mean you're going to get a cramp and drown.

    A bunch of people swimming in a pool

    13. Humans don't lose a disproportionate amount of body heat through their heads.

    14. Every medical show on TV has been lying to you, because shocking someone in asystole (aka flatline) will not get their heart beating again.

    15. Waking a sleepwalker won't kill them.

    16. And finally, rust doesn't give you tetanus.

    rusty nails