Michio Kaku (, ; born January 24, 1947) is an American theoretical physicist, futurist, and popularizer of science (science communicator). He is a professor of theoretical physics in the City College of New York and CUNY Graduate Center. Kaku has written several books about physics and related topics, has made frequent appearances on radio, television, and film, and writes online blogs and articles. He has written the "New York Times" best sellers "Physics of the Impossible" (2008), "Physics of the Future" (2011), and "The Future of the Mind" (2014).