Of all things Thomas Alva Edison is known for, concrete is not one of them. It was one of Edison's less successful ventures, but not one without significance.
Towards the end of 19th century, Edison, like many businessman and builders of the time, was captivated by the possibilities of cement. Edison believed that concrete was the future and the answer to all housing problem, and he decided to act on this impulse in a big way.
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Concrete houses in Gary, Indiana constructed using methods developed by Thomas Edison. Photo credit: Eric Allix Rogers/Flickr