for scene 8 of the video " Ice Age of the dimmer Sun in 30 years - 8 Dawn of humanity" by Rolf Witzsche
here for a larger image
Since it became possible with Carbon-14 measurements
Since it became possible with Carbon-14 measurements, to measure the historic volumes of the solar cosmic-ray flux, and it became self-evident that this volume varies dramatically with changing solar activity, which is also mirrored in temperature changes, it becomes possible to correlate cultural effects with changes in solar cosmic-ray flux.
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Published by Cygni Communications Ltd.
North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F.