00451nam a2200085Ia 4500008004100000245002400041300023400065650001300299856005300312170517s9999    xx            000 0 und d  aEarth in 1000 Years  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...  xScience.  uhttp://topdocumentaryfilms.com/earth-1000-years/