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Thomas Edison: How the lightbulb changed everything

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Ernest Freeberg
Ernest Freeberg is head of the history department at the University of Tennessee in Knoxville and the author of "The Age of Edison: Electric Light and the Invention of Modern America."
Courtesy of Kelli Guinn

University of Tennessee historian Ernest Freeberg, author of "The Age of Edison: Electric Light and the Invention of Modern America," discusses how the lightbulb changed nearly everything about American life. 

He spoke at the History Forum at the Minnesota Historical Society Feb. 14, 2015.