5
You should never wake up a sleepwalker

Source: wikipedia, Image: wikipedia
According to the myth, if you wake a sleepwalker it can give them a heart attack or send them into shock. While that won’t happen, it is probably best just to guide them back to bed because if you wake them up they’ll probably be really, really groggy.
4
You become resistant to antibiotics

Source: wikipedia, Image: wikipedia
It is not you that becomes resistant to antibiotics, it is the bacteria.
3
Hair grows back thicker

Source: wikipedia, Image: wikipedia
It doesn’t. When it grows naturally, it grows tapered. When you shave it, it has a blunt tip. This blunt tip may make your hair appear to be thicker but it’s not. The thickness of your hair is determined beneath the skin by the root, over which your razor has no say.
2
Drowning people flail

Source: wikipedia, Image: wikipedia
Hollywood is wrong on this one. As every lifeguard will tell you, drowning people are hard to spot because they don’t make much of a racket. Drownings are usually extremely silent with not much going on at the surface of the water.
1
Vaccines cause autism

Source: wikipedia
Although the study that started this rumor has been debunked as a fraud, everybody still seems to believe. No, vaccines do not cause autism any more than driving cars cause diarrhea.
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