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Light so Fast it Travels Backward 415

An anonymous reader writes "Slowing down light used to be considered a neat trick for physics wonks. But researchers in New York now say they've pushed light into reverse. And as if to defy common sense, the backward-moving light travels faster than light." While there's not much use to come of it yet, it will be interesting if Einstein himself is proved wrong.

"Consider a spherical bear, in simple harmonic motion..." -- Professor in the UCB physics department