Michio KakuDr. Michio Kaku is a theoretical physicist and the cofounder of string field theory (a branch of string theory), and he continues Einstein's search to unite the four fundamental forces of nature into one unified theory. He is also the New York Ties bestselling author of seven books, including his most recent work, Physics of the Future: How Science Will Shape Human Destiny and Our Daily Lives by the Year 2100. Read More Read Less