Chairman Sven Lidin, left, permanent secretary Staffan Normark, center, and professor Gunnar Karlstrom of the Royal Swedish Academy of Sciences announce the laureates Martin Karplus, Michael Levitt and Arieh Warshe as winners of the 2013 Nobel Prize in chemistry, during a press conference at the Royal Swedish Academy of Sciences in Stockholm, Sweden, Wednesday Oct. 9, 2013. (AP Photo/Claudio Bresician, TT News Agency) SWEDEN OUT

Photo by: Claudio Bresciani

Chairman Sven Lidin, left, permanent secretary Staffan Normark, center, and professor Gunnar Karlstrom of the Royal Swedish Academy of Sciences announce the laureates Martin Karplus, Michael Levitt and Arieh Warshe as winners of the 2013 Nobel Prize in chemistry, during a press conference at the Royal Swedish Academy of Sciences in Stockholm, Sweden, Wednesday Oct. 9, 2013. (AP Photo/Claudio Bresician, TT News Agency) SWEDEN OUT