5/6. Sound: Documentary series. A look at the unsung heroes who allowed us to transport our voices over long distances - one of the greatest transformations in how we live our lives. Also in HD. [S]
4/6. Light: Steven Johnson discovers the unsung heroes of invention in the surprising journey from the candle to the neon lights of Las Vegas and the world of lasers. Also in HD. [S]
3/6. Cold: For at least 100,000 years, humans have been able to make fire, but making things cold is a modern skill. Steven Johnson traces the unsung heroes of this technology. Also in HD. [S]
3/6. Cold: For at least 100,000 years, humans have been able to make fire, but making things cold is a modern skill. Steven Johnson traces the unsung heroes of this technology. Also in HD. [S]
1/6. Clean: From the clean environment of a microchip factory to the engineer who lifted a city to install sewers, Steven Johnson traces the journey from dirty to clean in our lives. Also in HD. [S]