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Similarly when a flying saucer makes a sudden turn, traveling many thousand miles an hour, why don't the molecules or crystals of its metallic structure literally tear apart - from the great strain imposed by the laws of inertia? And finally, as the saucers rush through the atmosphere why don't the molecules of the atmosphere, striking against the saucer cause heat through friction and eventually burn the object up? It is these very remarkable performances that have led many persons to believe the saucers are not real. Material objects cannot behave this way: The saucers must be moving light, optical illusion, mirage, defraction pattern, atmospheric lense or, to PFO's (Persons Farthest Out), ghosts or spirits. The head of Air Force Intelligence remarked rather wistfully after the great Washington Airport sightings some years ago that he (i.e. the Air Force) did not have anything with infinite energy and no mass. Any person trained in non- relativistic physics believes it would be impossible for ponderable mass to behave as the UFO's behave. However, the trouble with this argument seems very real, indeed. For saucers do exist: They have been photographed: They return firm radar images: And at close range they look very much like craft made of metal or transparent materials similar to plexiglass. Aside from their unusual tricks they seem to have all the characteristics of hard material objects which are designed, Fe a ee cs ae oe two respects. Either we must conclude that our knowledge of the rules which hold atoms and molecules together is incomplete, or we must revolutionize our concept of inertia. If both alternatives were beyond the reach of modern science there would be no reason to prefer one over the other. But, in fact, there is a perfectly good way of explaining the saucers within modern physical theory. To do so, however, we must pass to the abstract heights of physics, in particular to Albert Einstein's General Theory of Relativity. Now, before you are too frightened, let it be said that the General Theory is not as complex and intricate as some persons think. Its reputation for difficulty arises from the fact that, to grasp it, a transvaluation in the way we feel about the world is necessary. Newton's concept of inertia tells us that an object stays in its place unless some force is applied to it and when the force is applied the object moves with the force. Newton had rather mixed ideas of why inertia exists. At ae ate te bt mer mote Alesse ek tebe a a te tt one point in his Principia it is almost inherent in matter. At another point inertial or centrifugal forces arise from something called absolute space. The persistence of matter in its state, according to Newton, comes from its relation to an absolute world of space more final than any material system we can think of. fabricated, manufactured, or what you will. If the saucers are real solid vehicles we must revise our ideas of nature in one of