Understanding the Inventions That Changed the World

Cameras, Telephones, and Phonographs (1x19)

Air date: Aug 31, 2013

The mid-19th century saw the rise of analog communications, where film and electric currents were used as substitutes for an object or message. Meet the inventors of the first information age-among them, Louis Daguerre, Alexander Graham Bell, and Thomas Edison-and learn how they made information and knowledge widely available to millions.