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Maglev technology has been around for years as the propulsion method behind certain European and Asian trains, and basically involves using the Physics 101 properties of magnetic attraction and repulsion to provide an object with momentum.
Until now, these have relied on what are known as "metamaterials" - artificially-produced materials that have microscopic variations in their properties that guide incoming light waves around or over a hidden object.
The Earth appears to have cooling properties that exceed the previously thought ones, and computer models are inadequate to try to foretell a chaotic object like the climate, where actual observations are the only way to go.