The frame rate of US analog television signals was reduced from 30 to 29.97 to ensure color broadcasts were still compatible with black-and-white televisions.

As controller of BBC Two, Attenborough wanted the BBC to achieve the first full-color broadcast in Europe and saw Wimbledon as the perfect event to make it happen. Noticing that the white tennis balls used then would stain green and become less visible on color broadcasts as matches progressed, he suggested fluorescent balls, which were eventually adopted.

Nitrate film was the standard in early Hollywood and is prone to decomposition over time. It's led to an estimated 75% of early American films being lost to history.

The site displays the current time across all American time zones—corrected for network delay—and shows whether your device's clock has drifted. Computer clocks rely on quartz crystals that drift slightly with temperature and age, requiring alignment with atomic clocks (which are so stable that seconds are defined by them).

As electromagnetic waves interact with particles in a transparent medium, particles vibrate and generate their own electromagnetic waves. The interference of the original and generated waves, which are slightly delayed, results in ensemble light with an effective slower speed but unchanged color.

In 1971, Canadian radio stations were required to ensure their programming included at least 30% Canadian artists. The impact was both cultural and commercial, with Canadian artists gaining more visibility at home and Canadian studios and songwriters earning more pay.

The US ranked 26th in the world for mobile speeds and eigth for fixed broadband speeds during April 2022. See this ranking of mobile and fixed broadband speeds from around the world on a monthly basis.

AM radio was popular but prone to interference and static, which could be frustrating for listeners. In 1933, Armstrong, a Columbia University professor, discovered that a clearer signal could be broadcast by revising how it was captured.

It costs 35% less to maintain AT&T's fiber subscribers than it does to keep up its legacy copper lines, a big difference leading the major phone company to plan to end its copper lines by 2030. Tens of millions of households still utilize a landline phone in the US, but they've been trending downward for at least two decades as people have gone wireless. Learn the trends and see the data visualized in this article.

As space stretches out, the wavelength of light traveling through it also expands, causing its frequency to decrease to maintain the speed of light constant. Since we perceive frequency as color, a lower frequency would produce a redder color, allowing astronomers to correlate reddening with the rate of expansion.

The rapid development of integrated circuits—the basis of computing power—in the 1960s catalyzed an industrial shift toward miniature devices, including pocket transistor radios, smaller TVs, and more. This first consumer electronics trade show (with a slate of 117 exhibitors and 17,000 attendees) sought to make everyday electronics accessible and portable. See a timeline of early consumer tech with photos.

Since the introduction of USB 1.0 by a consortium of companies, data transfer speeds have steadily increased from 1.5 megabits per second to 40 gigabits per second as of 2019. Variations in USB connector types enable them to be used for applications and devices that require different speeds and power.

The color scheme of traffic lights wasn't chosen because red travels farther through fog. Instead, it emerged accidentally from railroad safety rules, an exploding gas traffic light, and even primate color vision.

Early television shows were filmed with a single camera capturing multiple takes from numerous angles, making for an arduous filming process that sucked the energy from comedies filmed in front of live studio audiences. Arnaz proposed a three-camera setup that allowed the show to be filmed like a play, which soon become an industry standard.

1948's landmark United States v. Paramount Pictures found that the "Big Five" studios violated antitrust laws, effectively ending the reign of the vertically integrated system and the golden age of Hollywood.

An electronic funds transfer is the transfering of money from one bank account to another via computer-based systems. When it was first introduced, it was revolutionary. A video from 1980 aimed to explain the value of electronic funds transfer to consumers at the time.

Antennae tune a radio to a particular frequency (determined by the listener on their radio's dial) while tuning out all the other stations being broadcast. AM, short for amplitude modulation, and FM, short for frequency modulation, decode audio signals differently, leading to differences in sound quality and the distance a station can travel.

The red–blue color scheme used on election night maps emerged in the 20th century as television networks adopted color graphics to make results easier to follow. The association of red with Republicans and blue with Democrats later became standardized.

In 1947, President Truman delivered the first televised State of the Union address, marking the address's shift into the visual age and expanding the president's reach beyond radio to a national TV audience.

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.

As consumers continue to shift their viewing activity away from traditional cable and broadcast TV, they’re spending an increasing amount of time streaming content, much of it on YouTube. In fact, Nielsen data from August 2025, shows that YouTube accounted for 13.1% of US screen time, compared to Netflix’s 8.7%.

The rise of televised games in the mid-20th century expanded college football’s reach far beyond campus stadiums—turning regional rivalries into national events, boosting revenue, and cementing the sport as a Saturday tradition across the country.

The near-infrared and ultraviolet light captured by the space telescope is not visible to human eyes, but observational data of these types of light can be filtered and modified into visible colors. Many detailed images of astronomical objects are the result of combining these artificially colored images into layers.

It had significant impacts on just about every industry, including finance. Specifically, the transatlantic cable made it so that real-time financial transactions could take place across the Atlantic, and allowed for much faster sharing of information that increased global market accuracy.