 But what if you live somewhere where there isn't a lot of oxygen or there's no oxygen available? Well, you have to turn to other elements, other chemicals that are also capable of accepting electrons. So rock and metal are alternatives and they'll work in a pinch. They're not as efficient or as, you know, great as oxygen, but they can work. So there are microbes that have learned to do this. Some of them will chew rock and metal and bring it into their cells and