Water worlds bring us closer to finding Earth's twin

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Source: http://feeds.newscientist.com/c/749/f/10897/s/2b28ee67/l/0L0Snewscientist0N0Carticle0Cmg218291440B30A0A0Ewater0Eworlds0Ebring0Eus0Ecloser0Eto0Efinding0Eearths0Etwin0Bhtml0Dcmpid0FRSS0QNSNS0Q20A120EGLOBAL0Qonline0Enews/story01.htm

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