Anne L'Huillier, member of the Nobel Committee for Physics, Goran K Hansson, Permanent Secretary of the Royal Swedish Academy of Sciences, and Olga Botner, member of the Nobel Committee for Physics, sit in front of a screen displaying the winners of the Nobel Prize in Physics 2015 Takaaki Kajita (L) and Arthur B McDonald during a press conference of the Nobel Committee to announce the winners of the 2015 Nobel Prize in Physics on October 6, 2015 at the Swedish Academy of Sciences in Stockholm, Sweden