What was Edison's controversial role in the invention of the electric chair? What's the little-known link between the Civil War and the Ouija board, or stockings and roller coasters? And how did an explosive guilt trip lead to the birth of the Nobel Peace Prize? We explore four chilling inventions, and reveal the stories of the inventors whose million-dollar ideas shook the world and created legacies still with us today.
Air Date: Jun 14, 2015