President of Japanese research institute Riken, Ryoji Noyori attends a news conference in Tokyo

Nobel Prize-winning chemist and President of Japanese research institute Riken, Ryoji Noyori attends a news conference in Tokyo March 14, 2014. Japanese research center Riken apologised for what it calls ‘grave mistakes’ in their stem-cell study published in Nature magazine. REUTERS/Toru Hanai (JAPAN – Tags: HEALTH SOCIETY SCIENCE TECHNOLOGY HEADSHOT)