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tachyons

A three-dimensional graph depicts the relationship between three different velocities v, u and U, where v is the velocity of a second observer measured by the first observer, u is the velocity of moving particles measured by the second observer and U is the relative velocity of the particle for The first viewer. Image: Hill and Cox

Einstein's theory of relativity also holds for speeds higher than that of light

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A neutrino captured at CERN in 1988. Photo by Tomasz Barszcza, UC Irving

The Phantom of the Opera: OPERA is repeating the faster-than-light neutrino experiment following the criticisms

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The neutrino detector in Gran Sassi in Italy, where particles apparently faster than light were discovered

Still, the neutrino may not have gone the speed of light

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