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Associated Press
In this Monday, Oct. 8, 2012 photo combo, British scientist John Gurdon, left, speaks in London, and Japanese scientist Shinya Yamanaka, right, speaks in Kyoto after they were named winners of the 2012 Nobel Prize in medicine for discovering that mature, specialized cells of the body can be reprogrammed into stem cells — a discovery that scientists hope to turn into new treatments. (AP Photo/Matt Dunham, left; Kyodo News, right)  JAPAN OUT, MANDATORY CREDIT, NO LICENSING IN CHINA, FRANCE, HONG KONG, JAPAN AND SOUTH KOREA

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