Thursday, July 23, 2009

Why won't hair on our heads stop growing? (not everyone though) How is it different from other

I don't see other mammals' hair to grow indefinitely. Is it something special only seen on humans?



Why won't hair on our heads stop growing? (not everyone though) How is it different from other kinds of hair?

Human hair doesn't grow indefinitely either. Everyone has a limit on hair length that is determined by genetics. For some people it's very long, others it's no more than shoulder length.

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