In honour of April Fool's Day, I offer my readers this semi-short summary of some interesting yet alternative ideas in physics that seem to attract a lot attention but very little serious research from academia (sometimes with good reason, sometimes not). In each case, they have been proven impossible or nearly impossible, and yet still generate mountains of literature.
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Perpetual Motion: This idea goes back to the dawn of science, and is simply the idea of building a device which moves foreve...

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