It is known that matter and energy warp the shape of spacetime. This is why, for example, objects in space fall into curved orbits rather than straight lines. The Alcubierre metric is a highly unconventional shape into which spacetime could, hypothetically, be warped. All it would take is a suitable arrangement of matter and energy, but there are two obstacles. For one, the matter must be exotic "un-matter", a substance which, while perfectly consistent with the laws of physics, only even exists hypothetically-- except, of course, for within the fertile and dangerous imagination of Eka Script
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