Michio Kaku is an American theoretical physicist, futurist, and popularizer of science. 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 four New York Times best sellers: Physics of the Impossible (2008), Physics of the Future (2011), The Future of the Mind (2014), and The Future of Humanity (2018). Kaku has hosted several TV specials for the BBC, the Discovery Channel, the History Channel, and the Science Channel. In 2018, Kaku began hosting the web series Next World with Michio Kaku on CuriosityStream.