PBS News Weekend

Theoretical physicist Michio Kaku on a lifelong quest to solve Albert Einstein's so-called "God Equation" or the theory of everything, starting at the young age of eight: "He wanted an equation no more than one inch long that would allow him to quote read the mind of God. So I said to myself, wow, this is for me. This is something that I have to do." PBS NewsHour Weekend's Mori Rothman reports.