Taped by WGBH Forum Network, physicist and essayist Alan Lightman visited Harvard Book Store to talk about his book, The Accidental Universe: The World You Thought You Knew.

Lightman discusses what gravitational waves are, why physicists need more faith than you might think, and how he always knew he would work in science and art.

This talk took place on March 19, 2014 at 7:00 p.m.