That's false. Because Mars has no magnetic field, and because its atmospheric pressure is only 0.06 that of Earth, the radiation level at the surface is occasio

That's false. Because Mars has no magnetic field, and because its atmospheric pressure is only 0.06 that of Earth, the radiation level at the surface is occasionally life-threatening. In the event of a solar storm, human astronauts would have to take shelter underground. And the cumulative radiation levels in normal circumstances pose a danger over time, even in the absence of a solar storm: http://www.mars-one.com/faq/health-and-ethics/how-much-radiation-will-the-settlers-be-exposed-to http://www.mars-one.com/faq/health-and-ethics/how-much-radia...