What kinds of physical and engineering challenges will have to be overcome before energy shields (or force fields) can be invented?
A force field specifically for blocking matter is readily conceivable. In fact, it’s been documented. (This has not yet been corroborated, nor has it been treated scientifically…) In August 1980, at a 3M plant in South Carolina, a curious phenomenon was discovered. This plant processed large amounts of polypropylene film. On the factory floor, a continuous feed of plastic film 21 feet in width proceeded at 10 miles per hour over a series of rollers, before being cut into narrower rolls. This film passed along the floor, then up and over a walkway, then back down. Workers reported unusual events within the ‘tent’ formed by the archway. David Swenson of 3M Electrical Specialties Division in Austin, Texas was called in to investigate. What he discovered was that under the right conditions, this ‘tent’ produced a physically impenetrable wall in it’s center. The effect was verified the next day by the plant manager. For some reason, this phenomenon was treated as a problem, which was solv