(AGI) Stockholm, Oct 6 - The 2015 Nobel Prize for Physics hasbeen awarded to the Japanese scientist Takaaki Kajita and hisCanadian colleague Arthur B. McDonald, the Swedish Academyannounced on Tuesday. The two scholars were honoured for "forthe discovery of neutrino oscillations, which shows thatneutrinos have mass". "The discovery has changed ourunderstanding of the innermost workings of matter and can provecrucial to our view of the universe," stressed the SwedishAcademy. "The new observations had clearly showed that theStandard Model cannot be the complete theory of the fundamentalconstituents of the universe," it added. Kajita and McDonaldwill share the prize of 8 million Swedish kronor (855,000euros). The ceremony will take place on Dec. 10 in Stockholm. Neutrinos, after photons, are the most abundant particles inthe universe. Their existence was first postulated in the1930s, but they were only discovered in the 1950s, with theAmerican Frederick Reines, author of the discovery along withClyde Cowan, receiving the Nobel Prize for the discovery in1995. Last year the Nobel Prize for Physics went to threeJapanese researchers, Isamu Akasaki, Hiroshi Amano and ShujiNakamura, for having invented a new energy-efficient andenvironment-friendly light source - the blue light-emittingdiode (LED), which can help to combat global warming andclimate change. (AGI) . .