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245			_aEarth in 1000 Years
300			_aEach glacial period is followed by an interglacial period in which temperatures rise and the ice retreats. The Milankovitch cycles are not strong enough by themselves to cause the shift. What they do is get the ball rolling. A...
650			_xScience.
856			_uhttp://topdocumentaryfilms.com/earth-1000-years/
999			_c334201 _d334201