As I’ve gotten older, I mean.

  • AFK BRB Chocolate (CA version)@lemmy.ca
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    11 days ago

    I’m not a geneticist or anthropologist, but apparently that’s a debated, not proven mechanism. The theory being that natural selection works not just on individuals, but on societies. So if older members of a society are more inclined to help take care of the young, that society is more likely to survive, so that trait is more likely to get passed along and become more common in the population. That mechanism would only apply to social/pack animals (like humans), so wouldn’t apply to, say, turtles.

    But it’s hard to argue that ear hair in old men helps their society thrive. More likely, it’s just one more trait that is a result of aging and not selected for, like grey hair or wrinkles.