An artist's conception shows a starship entering a wormhole to travel to a distant galaxy.
Last month's "100-Year Starship" conference, backed by NASA and the Pentagon's Defense Advanced Research Projects Agency, threw a huge spotlight on the idea of sending spacecraft far beyond our solar system — but how realistic is that idea? Check out what one of the world's top experts on the subject has to say on "Virtually Speaking Science."
Read More: http://cosmiclog.msnbc.msn.com/_news/2011/11/02/8603075-reality-check-for-starships
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