• OldWoodFrame@lemm.ee
    link
    fedilink
    English
    arrow-up
    24
    ·
    4 months ago

    The “spandrel hypothesis” is the front runner explanation. Essentially we didn’t evolve to have chins but rather evolved other things that are helpful, and the chin is a byproduct of that other evolution. Not harmful so it didn’t get selected away, but not helpful.