Argument: Mars will subject spacemen to high levels of radiation
"NASA outlines its strategy for manned mission to Mars in 2031." Thaindian News. November 29th, 2007: "NASA needs to come up with solutions for effectively protecting the astronauts from the high levels of cosmic radiation they will be exposed to in deep space and on the surface of Mars. They will also need medical equipment for the diagnosis and treatment of illnesses or injuries."