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Physicists “Slow Down Light” to Just 61 Kilometers per Hour Using Ultracold Quantum Matter
The speed of light is often regarded as the ultimate cosmic speed limit, but researchers have now managed to slow it down dramatically—to just 61 kilometers per hour. This was achieved by using a Bose ...
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What near light-speed travel would do to time, mass and distance?
A spacecraft traveling at 99 percent the speed of light toward Alpha Centauri would cross 4.3 light-years in what feels like ...
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