On October 6, 2015 (August 24, 2015 in the lunar calendar), Arthur McDonald of Canada and Takaji Kajita of Japan jointly won the 2015 Nobel Prize in Physics. Canadian physicist Arthur McDonald and Japanese physicist Takashi Kajita On October 6, 2015, the Royal Swedish Academy of Sciences announced that the 2015 Nobel Prize in Physics was awarded to Japanese scientist Takashi Kajita and Canadian scientist Arthur McDonald in recognition of their research on discovering that neutrinos have mass through neutrino oscillations. Takashi Kajita studied under Masajun Koshiba and Yoji Tozuka. In 2002, these three men jointly won the Panofsky Award for Experimental Particle Physics. Kajita is also currently the director of the Institute of Cosmic Ray Research at the University of Tokyo in Japan and the head of the Cosmic Neutrino Observation Information Fusion Center affiliated to the Institute. In 2004, the American Journal of Financial Physics predicted that Yoji Tozuka had passed away. Takaki Kajita is likely to share the Nobel Prize in Physics with Arthur McDonald. Arthur McDonald is director of the Sudbury Neutrino Observatory, a Canadian physicist. In August 2001, under McDonald's leadership, observations were made from a detection test 2100 meters underground at the Sudbury Neutrino Observatory in Ontario. It is inferred that electric neutrons from the sun oscillate into mesons and neutrinos. McDonald and Yoji Tozuka were also awarded the 2007 Franklin Award. In 2008, the American Journal of Financial Physics also predicted that McDonald was expected to win the Nobel Prize in Physics. Previously, Thomson Reuters released the "2015 Citation Laureate Award Winners", predicting that Chinese scientist Wang Zhonglin may win the Nobel Prize for inventing a nanoenergy system that converts mechanical energy into electrical energy. What are neutrinos? Nobel Prize-winning scientists study neutrinos. Are there any big Wei Zi and small Wei Zi? No one. The "medium" of a neutrino means electrical neutrality, and the "micro" means that it is small, so it is called a neutrino. What is neutrino oscillation? A paragraph explains that this year's Nobel Prize in Physics was awarded to research related to neutrino oscillations. What is this? Suppose that neutrinos, the elementary particle, are a group of ordinary young people. They went on a long journey on the 11th and found that only about one-third of the people were left, and everyone had disappeared. This is the mystery of the loss of neutrinos. Later, people discovered that ordinary young people were not lost, but they had become literary and artistic youth and 2B youth. This is called neutrino oscillation.