02:32DiscoveryThe Gagarin LegacyBBC World Service Duration: 18 minutes Mon 18th Apr 2011, 02:32 on BBC World Service OnlineAvailable for over a yearListen nowIn a special edition, the BBC's Discovery programme marks the 50th anniversary of the world's first manned space flightGenresFactualScience & NatureFormatsMagazines & ReviewsBrandDiscovery Source: BBC Online