> lack of sunlight, shouldn’t be a huge issue on mars. Mars only gets 43% as much sunlight as Earth (https://en.wikipedia.org/wiki/Mars https://en.wikipedia.or

> lack of sunlight, shouldn’t be a huge issue on mars. Mars only gets 43% as much sunlight as Earth (https://en.wikipedia.org/wiki/Mars https://en.wikipedia.org/wiki/Mars). On top of that, Mars's lack of a magnetic field like Earth's makes cosmic radiation there worse to the point that colonies will likely be underground, or behind heavy shielding aboveground: https://phys.org/news/2016-11-bad-mars.html https://phys.org/news/2016-11-bad-mars.html