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James Maxwell found that electromagnetic waves could propagate through free space.
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rotary-spar transmitter, first radio program broadcast.
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after the RMS Titanic disaster, due to increased production Marconi opened the world's first purpose-built radio factory at New Street Works in Chelmsford.
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radio was first used to transmit pictures visible as television.
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Sociedad Radio Argentina aired a live performance of Richard Wagner's opera Parsifal from the Coliseo Theater in downtown Buenos Aires.
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The first radio news program was broadcasted in Detroit, Michigan.
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regular analog television broadcasting began in some parts of Europe and North America.
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In 1993, Malamud launched "Internet Talk Radio" which was the "first computer-radio talk show, each week interviewing a computer expert."
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the US Congress passed the Digital Millennium Copyright Act . One result of the DMCA is that performance royalties are to be paid for satellite radio and Internet radio broadcasts in addition to publishing royalties. In contrast, traditional radio broadcasters pay only publishing royalties and no performance royalties
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3,000 Americans released by consultancy Bridge Ratings & Research" found that "[a]s much as 19% of U.S. consumers 12 and older listen to Web-based radio stations."
