The start of commercial radio depends on how someone defines the word 'commercial.'

Many scholars consider the first commercial radio broadcast to be during the 1920 presidential election

On Nov. 2, Pittsburgh, Pennsylvania, station KDKA broadcast the results of the presidential election. Leo Rosenberg delivered the news that Warren Harding had won in a landslide to an audience of around 100 people.

See a timeline of commercial radio history

Radio, as we know it, began in the 1910s. This FCC timeline traces the evolution of the medium over the century that followed, highlighting groundbreaking broadcasts, speeches, and technological breakthroughs.

When a radio company was the biggest tech stock around

The Radio Corporation of America was the biggest stock during the 1920s. Originally called Marconi Wireless, the company transformed radio technology. The company pioneered broadcasting, created NBC, and became a tech giant. After remarkable growth and challenges, RCA was acquired by General Electric in 1986, marking the end of its 67-year independent existence.

Franklin D. Roosevelt used radio to connect directly with Americans through his 'Fireside Chats'

Beginning in 1933, FDR harnessed the new medium of radio to explain policies and reassure the public during the Great Depression and World War II. His conversational fireside chats revolutionized presidential communication.

The first nationally broadcast soap opera was 'Clara, Lu, 'n Em'

The show first aired in Chicago in 1930, but was then picked up by NBC and broadcast across the country in 1931. The show followed three women who lived in the same duplex. Listen to a 1934 episode below, including the preshow's soap-centric advertising.

The network’s early days were focused on movies and sports

HBO launched in 1972, with an initial focus on commercial-free movies and sports events. The network’s first-ever broadcast was an NHL game between the New York Rangers and the Vancouver Canucks, signaling its commitment to premium, live content.

The modern quiz show debuted in 1926

“The Brooklyn Daily Eagle on Current Events” was a radio show on New York’s WNYC. The Brooklyn Daily Eagle was a local newspaper, providing an air of authority to the format, with the paper’s associate editor acting as quizmaster.

In 1938, 1.7 million people were fooled into believing a Martian invasion was underway because of a radio play

Orson Welles' realistic radio dramatization of a Martian invasion of Earth, called "The War of the Worlds," caused quite a stir with audiences. The broadcast resulted in panic, with some people in the area where the story took place attempting to flee. It also helped Welles secure a contract with a Hollywood studio, leading to the creation of "Citizen Kane."

1 in 5 Americans get local news from the radio

According to a 2023 Pew Research Center report, radio remains the second most popular medium for local news, remaining a vital source for local concerns. Audiences for national public radio, however, have declined, with listenership for NPR-affiliated stations down 10%.

'The Grand Ole Opry' radio show debuted in 1925

The Grand Ole Opry began as "The WSM Barn Dance," broadcasting from downtown Nashville. The name changed when its host, transitioning from the station's previous program, said, "You've been up in the clouds with Grand Opera; now get down to earth with us in a shindig of Grand Ole Opry!"

Thomas Edison publicly executed animals with AC to convince the public of its dangers

J.P. Morgan first backed Thomas Edison's direct current system, seeing electricity's potential to usurp John D. Rockefeller's kerosene empire. Despite the investments and smear campaign against alternating current, alternating current ultimately won public support after lighting the 1893 World's Fair, after which Morgan would fund Tesla's wireless transmission tower.

The story of the first commercial US oil well and why crude oil is measured in barrels

The 1859 oil discovery in Titusville, Pennsylvania, sparked a boom in oil exploration and production to meet the demand for kerosene lamp fuel. Because the 42-gallon barrel was a readily available container already in use for shipping fish, butter, wine, and other goods, it was adopted by the Petroleum Producers Association in 1872 and by both the US Geological Survey and the US Bureau of Mines in 1882.

Carlin's 'Seven Words' led to a landmark Supreme Court ruling

The original recording of Carlin's bit aired on a New York radio station in 1973, leading to an FCC complaint. The case went up to the Supreme Court, which ruled that the FCC had the right to penalize broadcasters that aired obscene content during the daytime.

DJ Alan Freed was eventually charged in a 'payola' scandal

After popularizing rock 'n' roll, both as a genre and as a culture, Freed became an industry power player, producing movies, hosting concerts, and minting superstars. By the end of the 50's, Freed was charged with 26 counts of commercial bribery, for a scheme they called "payola," and investigated by the House subcommittee on Legislative Oversight.

Bob Hope's radio shows brought stand-up to the masses

Bob Hope’s 1930s variety shows featured comedic monologues. Unlike the tightly scripted and evergreen sets of vaudeville, Hope’s monologues leaned into topical and political humor, sometimes to the disapproval of his network.

Sputnik 1—launched in 1957—was Earth's first artificial satellite

Its launch accelerated US investment in the Space Race amid fears the Soviet Union had the technology to launch intercontinental nuclear warheads. It would be followed by Sputnik 2, which carried the first living being—a dog named Laika—to orbit.

The attack at Pearl Harbor led to the world's first around-the-world commercial flight

A World War II-era commercial flight was forced to change course when Pearl Harbor was bombed, leading the 12-member crew on the world's first commercial flight to circumnavigate the globe. The Boeing 314 crossed the equator four times during the journey, which totaled more than 30,000 miles and required the crew to strip the plane of any identifying marks.

A boom hit after WWI, with consumerism usurping frugality as an American value

When American soldiers returned home after WWI in the 1920s, they found a country ready to spend money, make a home, and indulge in creature comforts after wartime rationing. This uptick in US wealth and production led to job opportunities for advertising experts.

Hear how the Super Bowl went from a risky experiment to America's unofficial holiday

In this podcast episode, former Emmy award-winning ESPN producer Dennis Deninger traces the Super Bowl's unlikely rise from the AFL-NFL merger era to a national spectacle, explaining how it reshaped advertising, gambling, television, and American culture.

The Sugarhill Gang’s ‘Rapper’s Delight’ introduced hip-hop to the masses

While it’s not technically the first hip-hop song set to record—that’s Fatback Band’s “King Tim III (Personality Jock)”—1979’s ”Rapper’s Delight” is the song that proved rap was worth putting on wax and introducing the music to a broader audience by reaching the US top 40.

Advertising powerhouse Mary Wells Lawrence was the first female CEO of a public company listed on the NYSE

The TV show “Mad Men’s” character Peggy Olson is inspired by Wells Lawrence, who founded ad agency Wells Rich Greene in 1966. Wells Lawrence is also known for her famous Alka-Seltzer campaign slogan, “plop plop fizz fizz.”

Hear the story of the first paramedic services, which grew out of a community training program in 1960s Pittsburgh

Before 911 existed, cities sent police cars or hearses from funeral homes to medical emergencies. In 1967, a group of young Black men in Pittsburgh changed that, developing the training protocols and lifesaving techniques that became the foundation of modern EMT response.

See Rockefeller Center's Christmas trees since 1931

In 1931, with construction still underway, Rockefeller Center's very first Christmas tree was erected out front. John D. Rockefeller himself greeted the construction workers who put up the first 20-foot tree and decorated it with cranberries and paper garland.

Pulitzer's newspapers were intended for the masses

His newspapers, the St. Louis Post-Dispatch and the New York World, transformed journalism by marketing to a mass audience rather than just the elite.

Benjamin Franklin donated the books that became the first true public library in the US

In 1778, the town of Franklin, Massachusetts—named in his honor—asked Benjamin Franklin for a bell, but he donated a book collection instead, saying "sense" was more important than "sound." Residents voted in 1790 to make the books freely available to all, creating the nation's first public library.

After the Boston Tea Party, colonists switched to coffee, which became the main morning drink for revolutionaries.

The history of many kitchen appliances involves unexpected discoveries and applications, including wartime radar turned hamster defroster and replacing an 'ice king' with heat-stealing boxes.

70 years ago today, city officials in Santa Cruz, California, banned rock 'n' roll to protect its youth from corruption after witnessing a 'provocative' concert the night before.

At the beginning of the 20th century, a group of young men ate standard American food—replete with food additives like borax and formaldehyde—as part of government research to better understand food safety.

Walt Disney's early film 'Alice's Wonderland' was a groundbreaking innovation in the silent film era

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.

The Beatles' US label rejected the band's first two singles, 'Please Please Me' and 'From Me to You,' with one executive calling the band 'dead in the water.'

The name 'Silicon Valley' arose from the founding of Shockley Semiconductor Laboratory in Fairchild Semiconductor in 1956-57, founded near Stanford University in Palo Alto

Sears sold DIY house kits starting at $600 in its famous catalog from 1908 through the 1940s, resulting in roughly 10,000 'Sears and Roebuck houses' being built.

A researcher recently discovered an interview from 1967 between groundbreaking journalist Joan Didion and the Grateful Dead, years before the band became an institution.

Abraham Lincoln was almost assassinated weeks before his inauguration as he traveled from Illinois to DC through Baltimore in 1861; it took two independent claims for Lincoln to be convinced the threat was real

'Saturday Night Fever,' the 1977 film that introduced disco to the mainstream, was based on a fabricated magazine story.

See how Budweiser's famous Clydesdales spend their days at Warm Springs Ranch, where roughly 70 to 80 of the beer brand's giant horses can be found at any given time.

A small portion of The Winstons' 'Amen, Brother,' an obscure '60s gospel record, is the basis for thousands of hip-hop tracks, making it one of the most sampled records ever that's informally known as 'the Amen break.'

Long before Major League Baseball began allowing instant replay for balls and strikes, an umpire reluctantly used the technology to determine whether a hit was a home run, a move that inadvertently ushered in a new era for the sport.

Before humans, the Soviet Union and the United States sent animals—including apes, dogs, and cats—to space during the Space Race.

In 1939, baseball star Lou Gehrig delivered his inspirational 'Luckiest Man' speech after retiring due to the health condition that now bears his name.

Warren Buffett's former professor Benjamin Graham is known as the 'father of value investing,' a strategy in which investors seek to buy stocks trading below their intrinsic worth.

Search a massive database of over 4 decades of clues from the TV quiz show 'Jeopardy!'

Domino's Pizza's 30-minute delivery guarantee was responsible for the chain's 1980s surge, but it was discontinued after the company was found liable for delivery driver accidents.

The first image of a black hole was captured by creating an Earth-sized virtual observatory from a network of eight radio telescopes.

The most expensive ad of all time was for Chanel No. 5 perfume and cost roughly $33M to produce in 2004—about $57M in today's dollars.

An initial public offering or 'IPO' is the process of a private company becoming public by putting shares of the company on the stock market for purchase.

Watch contemporary footage covering the US-backed Shah of Iran fleeing the country in the face of the 1979 Iranian Revolution