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Originally Posted by UnderseaLcpl
Well, that's enough thread-derailing for me for one day, so I'll just add that however I may feel about NASA, I'm glad their rovers survived and got all that data. Does anyone know if they got any samples that gave us much info about Mars' magnetic field?
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Well it wasn't the rovers that discovered this but one of NASA's orbiters. There are a number of magnetic fields on Mars, its thought that the planets magnetic field is in its last stages before it vanishes because the planets core is becoming solid rock again and thus has stopped spinning. This is though have been caused by a moon that was captured by Mars, the tital forces of the moon caused the planet to spin more until the core heated up much like Earth's until the moon crashed in to Mars and oblitrated the northern half of the planet.