The Nobel Prize in Physics 2015 recognises Takaaki Kajita in Japan and Arthur B.

The Nobel Prize in Physics 2015 recognises Takaaki Kajita in Japan and Arthur B. McDonald in Canada, for their key contributions to the experiments which demonstrated that neutrinos change identities. This metamorphosis requires that neutrinos have mass. The discovery has changed our understanding of the innermost workings of matter and can prove crucial to our view of the universe.

PR:
http://www.nobelprize.org/nobel_prizes/physics/laureates/2015/press.html

Image:
The Daya Bay Reactor Neutrino Experiment in southern China.
Photo via Roy Kaltschmidt, Berkeley Lab Public Affairs

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