For many Americans, cell phones are supplanting the landline

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A recent study by the Centers for Disease Control and Prevention shows that nearly three out of 10 American households receive almost all calls by mobile phone. But if the landline is on the wane, University of Virginia professor Siva Vaidhyanathan says a more compelling chapter in telecommunications is just beginning — and our relationship with the phone itself is being redefined.Guest: Siva Vaidhyanathan, University of Virginia