@ariadne It's such a stupid concept. There's no usable atmosphere on Mars and the conditions are far too harsh for long-term human occupation on it's own. For it to even hypothetically work you'd have to build tons of pressurized climate-controlled pods and domes for people to live in, which they can't possibly leave without putting on a bulky spacesuit. And since travelling to Mars is obviously going to be exorbitantly expensive, the only people that'll ever do it are billionaires.