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LOL Lox that was funny [img]smile.gif[/img]
As for the Sun, it is the single biggest factor for temperatures here on earth. Variations in solar output, changes in the density of dust and gas in the solar system also plays a part, for all we know the earth goes through a dust cloud every so often, it wouldnt have to be very dense, just enough to block a small percentage of incoming radiation.
As someone mentioned onece, there are as many theories as there are people researching the problem.
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