A radio in Norway, photographed in 2009. The country is shutting down its FM network this year and switching to digital radio. Stig Morten Waage/Flickr hide caption

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Stig Morten Waage/Flickr

A tiny radio receiver built from components the size of two atoms. It emits a signal as red light, which is then converted into an electrical current and can be broadcast as sound by a speaker or headphone. Eliza Grinnell/Harvard School of Engineering and Applied Sciences hide caption

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Eliza Grinnell/Harvard School of Engineering and Applied Sciences

This Christmas Song Brought To You By The World's Tiniest Radio Receiver

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People listen to the radio as the results of the presidential elections are announced in Kireka, Uganda, in February. Many rural Ugandans don't have Internet access, and the radio is a central source of news — and platform for citizens' opinions. Isaac Kasamani/AFP/Getty Images hide caption

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Isaac Kasamani/AFP/Getty Images

Evelyn Birkby interviews guests on her KMA radio program, Down a Country Lane, in 1951 in Shenandoah, Iowa. Courtesy of University of Iowa Women's Archives/Evelyn Birkby Collection hide caption

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Courtesy of University of Iowa Women's Archives/Evelyn Birkby Collection

Ed Walker hosted WAMU 88.5's Big Broadcast, a popular show featuring rebroadcasts of vintage radio dramas, for more than two decades. The 83-year-old died Monday shortly after his final broadcast. Jeff Watts/WAMU 88.5 hide caption

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Jeff Watts/WAMU 88.5

Remembering A Lifelong Radio Man And His 'Big Broadcast'

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The Hidden FM Radio Inside Your Pocket, And Why You Can't Use It

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We finally found this simple, traditional radio at Radioshack — though they are also available, in abundance, online. Emily Jan/NPR hide caption

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Emily Jan/NPR

Finding A 'Radio That Is Just A Radio' In The Digital Age

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