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Date: 2012-02-29 15:56:18Relativity Faster-than-light travel Tachyons Faster-than-light Alcubierre drive Warp drive Velocity Speed of light Four-velocity Physics Special relativity Interstellar travel | Add to Reading ListSource URL: www.universetoday.comDownload Document from Source WebsiteFile Size: 3,69 MBShare Document on Facebook |