Fun article! Thanks for posting. Geoengineering is too narrow minded. We need star system engineering! As, by-the-by, how important are "habitable zones" to th

Fun article! Thanks for posting. Geoengineering is too narrow minded. We need star system engineering! As, by-the-by, how important are "habitable zones" to the Drake equation these days? We have an abundance of earth-life adapted to almost any temperature conditions commonly found on earth. Doesn't this imply that the total viable is wider than what we find here? How cold could a planet be and still have chemosynthesis?