Photo of hover board from Back to the Future
Bottom text:
SCIENTISTS
you have 3 years.
this post was submitted on 28 Jul 2023
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This has always been functionally impossible at the current understanding of science, even with superconductors. There's nothing to "push off of", unless you can invent literal anti-gravity technology, which afaik, is impossible.
Sure, the Earth has a magnetic field, but it can barely move a compass needle. It can't even lift a single gram of weight, much less some dude and a board.
You need a rocket in the bottom to be able to fly around freely. Or you'd be limited to keeping it inside a special area made just for it, using electromagnets.
Just replace all roads, sidewalks, and building interior floors with magnets. Easy.