If NASA is really serious about people living on Mars, I would think that they should build a rotating space station with Mars level of pseudo-gravity. Two dece

If NASA is really serious about people living on Mars, I would think that they should build a rotating space station with Mars level of pseudo-gravity. Two decent sized chambers connected by a tether might be the easiest to build. If one really wants to see if something complicated will work on Mars, running it in Martian G, is the only way to be sure. Long term studies in the current space station seem to suggest that humans can't live years at zero G without serious health problems developing. It would useful to try out Mars gravity (38% of Earth's) somewhat closer to Earth than the surface of Mars.