I think the most likely way to successfully land on Mars and stay there is to allow for frequent trips back and forth. Obviously I think Musk and SpaceX are taking this approach. Ensure complete and rapid rocket re-usability, make engines that take fuel that Mars mostly provides, and ensure a constant stream of supplies, growth, new people. If your colony is growing, and expanding, and there are frequently (every 2 y…
> But I doubt it would be much riskier than we're currently living our lives here on Earth. You're probably underestimating the risks associated with humans leaving Earth for any considerable period of time. Radiation is the first issue. NASA will not plan a mission that exposes astronauts to higher than a 3% risk of exposure-induced death. Their reports from 2010 based on all the studies done up to that point put th…
Unless we can develop drugs that trick the body into maintaining the correct muscle and bone density.