The hair follicles on your body come in different types with different programming, and those on your head are the most productive, up to a point. Believe it or not, these follicles can be transplanted to a different body part! But everyone's follicles are different. Some women never cut their hair, and they still have different lengths because their hair follicles are programmed differently. This TED-Ed lesson explains what's going on inside those follicles to give you the hair you have. (via Damn Interesting)
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