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Originally Posted by nohitters
i had a farely in depth conversation with my physics professor, and he told me that scientists currently believe that the earths magnetic field is weakening, and will soon shut down completely and flip so that the magnetic north pole will once again be in the north and vice versa for the south. being as the earths magnetic field protects the earth by reflecting dangerous cosmic rays from entering the earths atmosphere, the earths environment will be destroyed during the time in which the magnetic field is disabled. just another interesting possibility of the future to come
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Well the thing is that no one has any idea when the magnetic field will become too weak to support life. It could be 100 years, it could be a billion. While stuff like that really needs to be researched like mad (and it really is facinating stuff!!), for us non-scientists it's just another drop in the bucket. I'm filing it next to earth-killer asteroids, quantum phenomena resulting in massive inconsistencies in the laws of physics, and people cloning.