CIRCLE WITH A DOT

@MicroSFF In my Intro to Planetary Geology class 20 years ago (typically taught by a crusty old hand who had trained the Apollo crews), we had whole class one day by an old fashioned hard rock mining geologist on why mining the Moon is stupid, but here's how you would do it. There are no ore deposits, because there's no rivers, so to get anything remotely usable you have to process massive piles of bulk gravel through giant solar furnaces to get a bit of useful oxygen. Not a whole lot has changed since then, just a bit better knowledge of how little ice (and therefore hydrogen) there really is at the poles.