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We just watched a documentary about the magnetic fields and how they are changing- gradually switching places with each other. The outward magnatism and the inward magnatism (one of them is in the north, the other in south- I can't remember which) but that how scientists who have been studied this have seen significant changes and the breakup of the fields and how someday it will again switch on us- causing another 'Ice Age' to part of the world. It was really interesting.
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