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One thing is a fact:before all previous iceages the earth warmed dramatically.We are at that point in the cycle that we are approaching another iceage but this time around man has had a direct hand in the warming process.How this will affect things who's to say.
In an aside we are also fast approaching another phenomenon(?) scientists have dubbed a "flip-flop".This a reversal of the magnetic poles.
We are so close in fact that it could realistically happen within our lifetimes.
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