Rotating Bodies and Polar Flips

Thanks to Jack for sending me this interesting 15-minute video which looks at bodies rotating in zero-gravity.

Near the end, it goes into the discussion of whether the earth has ever physically “flipped” through its axis of rotation. I don’t think it ever has – nor will it….

Also, we do know from geological records that the earth’s magnetic field flips every few thousand years – and here’s new evidence of this phenomenon: A 40,000 year old fossilized tree that shows evidence of reversal in the tree rings.…

Kauri tree

The kauri tree unearthed during the expansion of the Ngāwhā Generation geothermal power plant. (NELSON PARKER)


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