Defying gravity. What if we could actually build an engine that didn’t need fuel? That’s the tantalizing—and maybe unbelievable—claim behind a new propulsion concept from a former NASA electrostatics specialist, who says electric fields alone can generate thrust. If true, that would overturn, oh, just one of the most fundamental principles in all of physics and radically change the future of spaceflight. The tiny problem is that so far, no independent lab has confirmed the result. But it sure is fun to dream.
—Andrew Daniels, Director of News
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