Radio has a history spanning more than 125 years. From the first wireless transmissions to on-demand streaming, the medium has continuously reinvented itself without ever going away.
The Foundations: 1880s–1900s
The theoretical groundwork was laid by James Clerk Maxwell, who predicted the existence of electromagnetic waves in the 1860s. Heinrich Hertz demonstrated them experimentally in 1887 — which is why we measure radio frequency in hertz.
Guglielmo Marconi is widely credited with developing practical wireless telegraphy. In 1895 he transmitted a signal over a short distance in Italy, and by 1901 he had achieved the first transatlantic radio transmission. His work was not broadcasting in the modern sense — it was point-to-point Morse code communication — but it proved the concept.
The Birth of Broadcasting: 1906–1920
Reginald Fessenden made what is considered the first audio radio broadcast on Christmas Eve 1906, transmitting voice and music to ships off the US Atlantic coast. The broadcast era began in earnest after World War One. KDKA in Pittsburgh, Pennsylvania, is often cited as the first commercial radio station, beginning regular broadcasting in 1920.
The Golden Age of Radio: 1920s–1940s
Radio became the dominant mass medium. Families gathered around sets to listen to news, drama, comedy, music, and sports. The BBC launched in the UK in 1922. In the US, NBC and CBS established national networks. Radio shaped public opinion, broadcast wartime news, and created the first celebrity entertainers who were voices without faces.
Television and the AM/FM Transition: 1950s–1970s
Television displaced radio drama and variety programming, but radio adapted by focusing on music, news, and talk. FM stereo broadcasting became commercially viable in the 1960s and eventually overtook AM for music listening due to its superior audio fidelity.
The Digital Era: 1990s–Present
Digital Audio Broadcasting (DAB) launched in Europe in the 1990s. Internet radio began emerging in the mid-1990s as broadband spread. Satellite radio launched in the US with XM and Sirius in 2001. Podcasting emerged in the early 2000s as an on-demand evolution of radio-style audio content.
Today, radio exists simultaneously as broadcast FM and AM, digital DAB, internet streaming, and on-demand podcast. The medium has fragmented but expanded, reaching more listeners globally than at any point in its history.