title text: "You legs may have a comparative advantage at running, but we arms have a competitive advantage at swinging hammers, so unless you accept that we're the dominant limbs and stop hogging the oxygen, that running advantage won't be around for long."

desktop link: https://xkcd.com/3290
mobile link: https://m.xkcd.com/3290
explainxkcd: https://www.explainxkcd.com/wiki/index.php/3290