I can't believe there hasn't been I sci-fi movie about this already. Is some way that mars could have once been like earth, but something happened. I'm still working on my degree in BS , so the only explanation I could come up with is Martians somehow used heat from the core of Mars to power their civilization, but in their bureaucratic greed cooled the core so much that it no longer created a magnetic field around Mars. Death fallowed shortly after....