"The nation that controls magnetism will control the universe"Dick Tracy
I recently read about the unusual characteristics of tri-layer Graphene;It can be turned off and on by applying a voltage.
Imagine a machine getting propulsion by repelling the Earth's magnetic field,or a space craft harnessing the magnetism that is permeating the universe.
It could also function as a magnetic shield.
Lots of development needed,but it is theoretically possible,in my mind.
"All I know is what I read in the funny papers"..Will Rogers
https://www.bu.edu/eng/2011/11/17/the-nation-that-controls-magnetism-will-control-the-universe/
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