Some older men’s enormous eyebrows, extensive ear hair and substantial sniffer strands seem like they never stop growing. While many men lose the hair atop their heads, others’ eyebrow, ear and nose hairs may look as if they’ve been dipped in a magical growing elixir.

In contrast, women’s hair, including their eyebrows, tend to thin as they age. So why do men’s various facial hairs often get bushier in old age, while women’s don’t?



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