Does mars have a magnetosphere? If not, then any humans living there are going to end up just like that cosmonaut from 487 days on Mir. The russians know that humans can't survive without the magnetic field and electromagnetic radiation that is natural within the earth's atmosphere. Anyone who thinks humans can live outside of the earth's atmosphere just hasn't done any research into the effect of non-natural EMF especially on loss of bone, but more generally, into the effect of being unable to sense the natural ELF waves in our atmoshpere. We are making our own planet this way with so much radio frequency emissions flying around now too, and the disruption to circadian cycles is the primary reason for cancer, heart disease, psychiatric disturbances.