Getting past “co2 groupthink”–back to raw science

http://serc.carleton.edu/eslabs/cryosphere/4a.html shows this:   timeline_ice_ages_456.gif

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http://ossfoundation.us/projects/environment/global-warming/natural-cycle  shows this:

5 Million Year Temperature Record

 

The 100,000 year cycles shown at far right (just above) are glaciation back to warm back to glaciation cycles; toward middle of graph the cycles are 41,000 years, warm to cold again.  what we have are about 9 glaciations across last million years, very rhythmic, and before that very rhythmic again across another 2 million years.  What could be the cause of these very rapid warming, then cooling cycles?  Here below are 3 possible clues–

1-1-2015    https://www.iceagenow.info/greenland-ice-melt-caused-heat-flow-deep-earth/

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Earth’s outer core iron jet stream  12-19-16   http://www.bbc.com/news/science-environment-38372342

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12-9-15   http://www.ibtimes.co.uk/antarctic-glacial-underbelly-scanned-first-time-hinting-volcanoes-magma-blowtorch-1532531

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Additionally, a Serbian mathematician of the 1920s offers another possible explanation:  MILANKOVITCH CYCLES

 

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