> I’ve always been extremely sceptical of “its vestigial” or “that body part is bad for you”. I mean, surely if either were true, selection would have done away

> I’ve always been extremely sceptical of “its vestigial” or “that body part is bad for you”. I mean, surely if either were true, selection would have done away with it. That's not necessarily true - if something is vestigial it is no longer affected by positive selection pressures; it won't be selected against until it is harmful. [0] [0]: https://en.wikipedia.org/wiki/Vestigiality https://en.wikipedia.org/wiki/Vestigiality