survive, we'll be long gone from this world before that happens. February 6, 2012 at 9:07 pm | Aaron Yes that will happen one day, but the sun will destroy this solar system well before that happens. The reason primarily Mars couldn't keep its magnetic field was due to the fact that it is not large or dense enough to a maintain molten core like the earth can and so cooled much faster. Once it cooled there wasn't enough electromagnetic energy easily swirling around to generate or maintain a field large enough to combat the solar wind. Once the magnetic shield was down the solar wind slowly eroded away its atmosphere to what it is today which is quite thin. As long as you don't ask us what a 'magnetic field' is then we all know what it is. But if you ask us, then we don't have a clue. February 6, 2012 at 9:12 pm | ?CHE? Hey, know your Basic Physics. Looks like you didn't take your 1st. Grade class Physics lessons seriously. When an object losses it magnetism or magnetic forces; there's ONLY one-degree of freedom (DOF) of its directional travel. And that is South Bound to disaster imaginable. Make sure you have an updated life insurance for your next of kin. Ooooops! You will collect it though? This sounds like old news to me..I though everyone had already agreed Mars had oceans and an atmosphere...and a small spinning liquid metal core..like earth..but Mar's core was smaller,