for scene 44 of the video " Ice Age 2050s: Certainty 1" by Rolf Witzsche
here for a larger image
Measurements of deep ocean sediments
The ice cores samples obtained at the Vostok site in Antarctica, further agree with measurements of deep ocean sediments.
Of course, all these measurements themselves do not indicate, or even proof, what had actually caused the ice ages. Or do they?
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Published by Cygni Communications Ltd.
North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F.