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Now Playing: 07-02-12 Marketplace Tech Report

Practically all of us rely on the Internet in everyday life. But how does the physical system that brings us Hulu and the Huff Post actually work? Blum gives answers in his new book, "Tubes: A Journey to the Center of the Internet." You may be surprised at how simple it can be. Plus, a new type of battery that you can paint on your device.