Tennis balls are yellow, partly thanks to a suggestion by British naturalist and broadcaster Sir David Attenborough.

How David Attenborough's work in color television gave tennis balls their color

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.

Wimbledon enforces a strict all-white dress code, a tradition dating back to the 1800s, when white clothing signified elite status.

Tennis balls get their bounce from pressurized nitrogen inside vulcanized rubber, made from heating natural rubber with sulfur to create molecular links that harden the material.

Modern tennis was formalized in 1874

In the late 1800s England, a growing middle class could afford homes with lawns. With more lawns in England, Major Walter C. Wingfield saw an opportunity to bring lawn tennis to the masses. Modern tennis was formalized in 1874, when Queen Victoria granted a patent for Major Walter C. Wingfield's lawn tennis box set. The game was an instant hit, and by 1877, the new All England Club in Wimbledon began hosting a tournament.

Why professional tennis players are so picky about balls before serving

Just as swimmers shave their bodies before competitions to swim faster, experiments show that tighter, less fluffy balls experience less drag forces when moving through the air and thus produce faster serves at the cost of less control. Players may select a fuzzier ball in scenarios that call for safer, more cautious play.

Tennis' weirdest rule (only for women)

At all but one Grand Slam, men and women played with the same tennis ball. But at the US Open, women were required to use a different ball until a change was made a few years ago. We break down the story behind that strange anomaly.

Wimbledon's signature dish is strawberries and cream, mainly because the fruit's peak season coincides with the tennis tournament.

Tennis can be played on clay, grass, hard court, or carpet

Tennis started on grass surfaces in England, but as the sport has grown, so have the surfaces used to play the game. This article details how each surface affects ball speed, bounce height, and player movement, and highlights which Major championship uses which surface.

The history of the tennis racket

Today's tennis rackets are made from lightweight composite materials, which is a big reason power, speed, and spin dominate today's game. But they weren't always built this way. This Top Sport Gear video shows the evolution of the tennis racket, from its start as medieval paddles, to the wood rackets of the early 1900s.

Table tennis originated as a leisure activity for the upper class

The sport's origin story can be traced back to 19th-century England, where it was known as "whiff-whaff." Players initially used a dinner table to play. After decades of evolution, ping-pong reached its "Golden Age" of popularity in the 1950s and 1960s.

See what women's tennis looked like through history

Women playing tennis today wear athletic clothing tailored to the demands of the sport. But when tennis started in the late 1800s, women were expected to play wearing long, Victorian dresses. Using historic photos, this Bustle article explores how tennis was brought to the US, what it looked like at the 1900 Olympics, and how the sport has grown since its inception.

Billie Jean King organized players into the WTA

In 1973, the Virginia Slims Circuit was successful, but when the USLTA demanded a higher tournament fee for Circuit players, promoter Gladys Heldman refused. In response, Billie Jean King met with over 50 players before the 1973 Wimbledon Championships to form the Women's Tennis Association, a move that led to equal pay at the US Open the following year.

Power lines are dotted with large, brightly colored balls to improve the visibility of these thin wires to helicopters and small planes and help prevent potential crashes.

The World Cup ball has had 23 different designs

Adidas has supplied the official ball for the last 15 iterations. The first World Cup final featured two different balls: one provided by Argentina and one supplied by Uruguay. Argentina was winning 2-1 before the balls were switched. Uruguay went on to win the match 4-2.

Pickleball's ubiquity has led to a culture clash with tennis

Since the late 1800s, tennis has been the world’s premier racquet sport. But in the late 2010s, rapid growth and investment in Pickleball changed that dynamic. This Cult Tennis video explores the newly created tension between tennis and Pickleball players, both on and off the courts.

Tennis' global evolution

In the 1970s and 1980s, American men and women dominated the top 100 rankings on both tours. But as each tour expanded its global reach, the American dominance declined. This Bleacher Report analysis breaks down the national make-up of the top 100 players for each decade. View maps that show which country gained and lost rankings through each decade and see who is the top country now.

The creator of 'The Simpsons' made his characters yellow so they would contrast with everything else on TV.

How billiard balls catalyzed the 'Plastics Century'

For centuries, billiard balls were made of ivory from elephant tusks. But when excessive hunting caused elephant populations to decline, they began to look for alternatives: celluloid, which would become known as the first plastic.

The BAFTAs won by David Attenborough, the only person to win across five visual display formats

The British Academy of Film and Television Arts awarded the naturalist for programming in black and white, color, high definition, 3D, and 4K resolution, starting with his first BAFTA in 1961. The VR film "David Attenborough's Great Barrier Reef" also won a BAFTA for London-based Alchemy VR in the Digital Creativity category.

Billie Jean King's victory at the 'Battle of the Sexes' drew over 90 million viewers

After Bobby Riggs trounced No. 2-ranked Margaret Court in the first Battle of the Sexes, he challenged superstar Billie Jean King to a match. King beat Bobby Riggs in a match at the Astrodome, which drew 90 million viewers worldwide, leading to the WTA's first TV deal in 1975. Using historic photos, this Sports Illustrated story dives into the spectacle surrounding the event, why King agreed this time, and the impact the match had on King, as well as the future of women's tennis as a whole.

The Open Era redefined both men's and women's tennis

The early days of modern tennis were largely enjoyed by the upper class, who had money for lawns to play on. More often than not, the best players competed for the love of the game, not money. This led to Grand Slams limiting the competitions to amateur athletes. Things changed in 1968, considered the start of the Open Era, when professional players were permitted to play.

Tennis' Grand Slam tournaments take place at some of the sport's most storied venues

There are over 50 events on the WTA calendar, but the tour's four Grand Slam tournaments are the ones both professionals and fans look forward to every year. This Eyes on the Stands video takes you on a journey from Melbourne Park, to Roland Garros, to the All England Club, and the USTA Billie Jean King National Tennis Center to learn the rich history of each venue.

The Original Nine paved the way for the WTA

In the late 1960s, men earned 2-3 times as much per tournament as women did. With professional tennis largely run by men, the women didn't have leverage. That prompted nine women to break away and form their own tournament, which in turn led to a dedicated tour the following year. This paved the way for the WTA, and eventually equal pay at Majors.

Wood that changed the color of water was the earliest recorded example of fluorescence

Lignum nephriticum, a tea used to treat kidney and urinary illnesses, was described in the 16th century as derived from white wood that turned water a bluish hue. However, in the 17th century, accounts described the wood as reddish and creating a kaleidoscope of colors in water. In 1915, the sources were identified as two different woods, which absorb UV radiation and emit visible light.

Tennis match interrupted by 'Cotton Eye Joe'

Tennis players require extreme focus as they volley on the court, and officials typically enforce significant noise standards during play. So it was quite a shock when the 1995 hit "Cotton Eye Joe"—as recorded by Swedish Eurodance band...

Breaking down sunlight and why the sun appears yellow despite emitting green light the most

This peak intensity is produced alongside a spectrum of other colors, which, when combined, make the sun appear white in space. Since Earth's atmosphere scatters bluer and greener wavelengths of light more than red and orange wavelengths, sunlight reaching Earth's surface appears yellow, while the sky appears blue. (Some readers may experience a paywall.)

Over time, the World Cup became a TV powerhouse, generating massive revenue from broadcast rights and ad placements.

A conversation with David Attenborough about his work, from his narrative style to technology

Although he began working in television before owning a television set, gaining experience as a producer in the editing room helped Attenborough develop an insight into creating engaging content with less dialogue. Among the technologies pioneered during his career were stabilized cameras for aerial shots, infrared and microphotography, and waterproof electronics for underwater cameras.

Memos detailing the shows David Attenborough commissioned, including Monty Python

From 1965 to 1972, Attenborough was on a trajectory to become the BBC's next director-general while serving as Controller and Director of Programs, overseeing what would air on television. "Monty Python's Flying Circus" and "Pot Black," which popularized the cue sport of snooker in the UK, were among the eclectic mix of shows he commissioned.

Gladys Heldman was a key promoter of pro women's tennis

The photo of the Original Nine holding up their $1 bills after signing their contracts is an iconic image in both the sport and the women's liberation movement. Gladys Heldman isn't in that photo, but she was the promoter behind the tournament and the subsequent Virginia Slims Circuit. This WTA Tennis article dives into her life and her unforgettable contributions to women's tennis.

Before 1920, during the Deadball Era, a single baseball was used throughout a Major League game, leading to a notoriously dirty style of play.

In 1956, Althea Gibson became the first Black Grand Slam champion

From 1944 to 1956, Althea Gibson dominated the American Tennis Association circuit, all while Jim Crow laws denied her entry into tournaments or even a hotel room like her fellow white competitors. This Wimbledon video shows her experience becoming the first Black woman to play the tournament in 1951, and meeting Queen Elizabeth II in 1957 when she won.

Discussing his early life, David Attenborough describes how his TV career began by chance

Growing up on the University College, Leicester campus, where his father was principal, Attenborough uncovered specimens such as coiled shells in the rocks and limestone of the surrounding Midlands, which sparked his interest in nature. A week after not landing an interview for a radio job he had applied for, Attenborough was offered a position on "a new thing called television."

The original basketball was hand-sewn

When the first basketball landed in a peach basket in 1891, it didn't look like the leather Wilson ball you see on today's NBA courts. The basketball evolved from the nondribbling days, when a hand-sewn ball with stitching like a football was used.

The origins of volleyball in a game called mintonette

Volleyball was invented in 1895 in Massachusetts, USA, by William G. Morgan of the YMCA. He aimed to create a less strenuous alternative to basketball, using elements from basketball, tennis, handball, and baseball. Originally called "mintonette," it was introduced at a YMCA conference and took off. Dive into the history from then until today here.

Water is naturally tinted with a slight blue, but sediments and organics can alter its color

The innate coloration comes from water absorbing red light in the visible spectrum more than green or blue, giving shallow waters in some parts of the Caribbean their turquoise hue. If sand is light, it can be churned up by turbulent water, clouding its appearance. Plankton and other organisms can color water by affecting how the rest of the spectrum is absorbed or reflected.

Billie Jean King on playing tennis before Title IX

Before Title IX, tennis legend Billie Jean King not only had to deal with limited resources; she also had to deal with isolating experiences, like being excluded from team photos at Long Beach State and being told to "get lost" by male teammates. (Some readers may experience a paywall.)

What happens to golf balls after they're used?

With over 1 billion golf balls produced annually, an estimated 300 million to 1.5 billion are lost worldwide. On average, thousands of balls are left behind on each course, often ending up in ponds, forests, and beaches. While many golf courses recover and reuse some of these balls, studies suggest countless remain unretrieved.

Every baseball used by the MLB only lasts about 7 pitches before it's discarded.

Read the 2006 op-ed Venus Williams wrote about equal pay

In 2005 Venus Williams met with French Open officials and the Wimbledon tournament board to advocate for equal prize money between men and women at the prestigious tournaments. The 2007 season marked the first time men and women received equal prize money in every Major.

The origin of the sport's name is disputed

How pickleball got its name has been a point of contention for decades. The McCallums claim the family dog, Pickles, used to snatch the balls as they played and named it for him. Joan Pritchard, though, says Pickles didn’t join the family until after the game was invented.

The first F1 sponsor was a cigarette brand

Early F1 cars were typically painted in the team’s national colors, but in 1968, Team Lotus replaced the British racing green with paint resembling their new sponsor, Imperial Tobacco. The sponsorship was a first in the sport and altered the visual and financial landscape of F1 forever.

Why David Attenborough was skeptical about global warming before bringing attention to it

Believing he was "experiencing the untouched natural world" in his early documentary series, Attenborough has admitted that many of his assumptions about human action were incorrect. It was not until attending a 2004 lecture on greenhouse gases and global temperatures that he became convinced of the science.

Designing the pitches for the FIFA World Cup 2026 took turfgrass scientists about eight years, as they sought to create identical conditions for indoor and outdoor fields across North America at various altitudes and climates.

Check out a compilation of golf's greatest shots, from Jack Nicklaus hitting the flag in 1972 to Tiger Woods' iconic chip at the 2005 Masters.

David Attenborough's career, from managing television programming to natural historian

Throughout his career, Attenborough's storytelling style framed nature as the stage where plants and animals were characters that audiences could connect with and become emotionally attached to. Before the breakout success of "Life on Earth" and working full-time on making programs about the natural world, Attenborough spent a decade in executive roles responsible for overseeing content on BBC channels.

England's sole World Cup win featured a 'ghost goal'

The 1966 match is known for Geoff Hurst's controversial third goal—called a "ghost goal." Watch the original footage, including the legendary call from announcer Kenneth Wolstenholme, and decide for yourself if the ball went in.

The Virginia Slims Circuit helped popularize women's tennis

Following the success of the Original Nine's first tournament, promoter Gladys Heldman worked with Virginia Slims to create a full-scale tour. While short-lived, the Virginia Slims Circuit marked the beginning of women's professional tennis, though it wasn't without complications, including logistical challenges and controversies stemming from its sponsorship by a cigarette brand.

Pickleball players and tennis players are running into problems over court space

Pickleball has become one of the fastest-growing sports in North America, especially for older adults. It's also led to tension with tennis players, whose courts are now being overtaken by pickleball players, with some municipalities adding pickleball lines to tennis courts.

Pickleball was invented in 1965 on Bainbridge Island, Washington

Bill Bell and then-Washington State congressman Joel Pritchard created the game as a way to entertain their bored children. They grabbed items they had on hand, using ping pong paddles to hit a wiffle ball over a hip-height badminton net.