S1 E4: Light

Aired: 10/30/2014 | 0:54:40 | Expires: 5/8/2019 | Episode
Best-selling author Steven Johnson tells the story of the people who took us out of the dark and into the light, including the invention of Edison’s light bulb and how an 18th-century shipping community discovered a source of illumination by putting a kid inside a whale’s head.