Where and how do you listen to the radio? Do you listen via a radio set at home, or on your phone or computer? Or do you listen in the car? In this episode of Media Futures, Mark Coles contrasts the surprisingly traditional radio sector in what is perhaps the world's most advanced media market - the United States - with newer forms of the medium which are emerging in rural Africa. Listen to the documentary and let us know what you think. BBC World Service - The Documentary, Media Futures, Media Futures - Radio bbc.inCan radio retain its simple appeal in a digital world?