'Graffiti' comes from the Italian for 'a scribbling'

Graffiti dates back to at least ancient Pompeii, where citizens scrawled messages to one another on public walls

Archaeologists discovered over 11,000 examples of graffiti in ancient Pompeii

Residents drew various figures and announcements on homes, temples, and walls, much of it preserved by volcanic ash. While some were clearly intended to be artistic, scholars have noted that the ancient graffiti has more in common with social media than with the tags and murals we associate today with the art form.

Ancient Romans sometimes lobbed insults through graffiti

Graffiti was used to communicate ideas, offer advice, and, not unlike the internet, talk some trash. That was especially true with tourists, who sometimes scrawled messages on the pyramids, including one person who complained, "I can not read the hierogylphics." In response, someone replied, "Why do you care that you can not read the hieroglyphics? I do not understand your concern."

Graffiti's lexicon includes slang for methods and aspirations

Quickly covering an area with graffiti, often fast tags and throwies, is called "bombing," a word that's intended to evoke images of an aerial raid. "Heaven" is a double entendre: It's a very high spot, both desirable and potentially fatal.

Graffiti has its own visual language, including simple 'tags,' large block letters, and complex 'pieces'

Every graffiti artist looks to create their own visual identity, but they often rely on common folk styles, especially when they're still developing their craft. "Tags" are little more than an artist's pseudonym, while "Wildstyle" takes an abstract approach to the signature. More complicated styles, like "blockbuster," are like informal billboards strapped to the sides of buildings and subway cars.

Graffiti became an integral part of hip-hop culture

The visual art form began taking off in New York alongside the music of hip-hop. Both were postmodern forms of art that repurposed preexisting materials. For graffiti, that was by using the city as canvas. For rap, that was through sampling. This retrospective not only shows how the two forms intersected, but also how the public perception of both changed over time.

In 1974, Norman Mailer touted graffiti as an intellectual art form

The Pulitzer Prize winner explored the style in his 1974 Esquire essay, "The Faith of Graffiti," before expanding on it in a book with 81 photos by Jon Naar. In it, he traces the form back to its ancient roots and compares graffiti writers to Renaissance painters.

Graffiti exists in a legal gray area

"Street art" has become a major seller in the art world, yet many states still consider graffiti to be illegal vandalism. Copyright law complicates the situation further, offering protections for "original works of authorship fixed in a tangible medium of expression," even if they've been created illegally.

'Grunge' was initially used as an insult

The first known use of "grunge" to describe music is believed to be by Mark Arm, a Seattle scenester, who mocked his own band by writing, "Pure grunge! Pure noise! Pure shit!" By 1987, it'd caught on as a more earnest descriptor for a sludgy mix of punk and metal: Sub Pop Records cofounder Bruce Pavitt described the band Green River as "ultra-loose grunge that destroyed the morals of a generation."

A popular tag in World War II announced 'Kilroy was here'

The graffito appeared seemingly everywhere throughout the 1940s and followed a similar pattern: A man with an oversized nose peering over a ledge, with the phrase written below it. Scholars believe it was an American form of similar tags that appeared in Australia and England, making "Kilroy" a meme long before the word had entered the lexicon.

'Tattoo' comes from a Polynesian word that means 'to strike'

“Tatatau” roughly translates to “strike,” a reference to the ancient process, which involved tapping ink into the skin with sharpened objects, like the bronze implements used circa 1450 BCE in Egypt, below.

The earliest depiction of Jesus' crucifixion

The Alexamenos Graffito is widely considered the oldest surviving image of the crucifixion. It was scratched into a plaster wall near Rome's Palatine Hill, probably around 200 CE. It is not devotional art—it shows a donkey-headed figure on a cross alongside the Greek inscription "Alexamenos worships his god," apparently drawn by a student mocking a classmate's Christian faith. No devotional depiction of the crucifixion would be made until the sixth century.

'The grotesque' describes a feature of Gothic literature

The term harkens back to decorative aspects of Gothic architecture, including mythical creatures like gargoyles. In literature, the grotesque describes similarly monstrous characters and situations.

How Scrabble got its name

Alfred Butts, a newly unemployed architect during the Great Depression, created Scrabble. But the game was named by James Brunot, who used the word to describe the most common action its players take part in: digging frantically.

Inflation was a word before deflation was

The word inflation has Latin roots and technically means an influx of air, first appearing in the English language in the 1890s to describe bike tires. Deflation's first known mention in an economic text was in 1919.

The scientific name for northern lights came from two Greco-Roman gods

Although cave paintings may have depicted them millennia earlier, one of the oldest known references to auroras is a Babylonian cuneiform tablet from about 600 BCE. In 1619, Galileo Galilei named the phenomenon in the northern hemisphere "aurora borealis" after the Roman goddess of dawn—Aurora—and the Greek god of the north wind—Boreas.

The word 'restaurant' comes from the Latin for 'restore'

Many believe the word came into use thanks to Boulanger, an 18th-century Parisian soup vendor. According to legend, his shop claimed it served "bouillons restaurants," or "restorative broths."

The political ideology of fascism originates in Italy

Fascism—first named by Benito Mussolini in 1919—derives from the Italian word fasci, linked to the Roman fasces, symbolizing authoritarian unity. Mussolini adapted this term to represent his autocratic, ultranationalist movement.

The word 'hoax' comes from the phrase 'hocus-pocus'

The famous phrase "hocus-pocus" combines liturgical Latin and gibberish. It's a silly series of words often said during magic tricks. The phrase naturally evolved into "hoax" over time and became a standard English word around the year 1800.

Legend has it that the Margherita pizza was named after an encounter with Queen Margherita

The Queen of Italy, Margherita of Savoy, visited Naples in 1889. As the story goes, chef Raffaele Esposito of Pizzeria Brandi made her a pizza with basil, mozzarella, and tomato, to represent the colors of the Italian flag, and eventually named the pie in her honor. Historians, however, note that the facts don't line up: The proof of her visit to the pizzeria is suspected to be a forgery created when the business was in dire straits in the 1930s.

The word 'jazz' evolved from slang for 'energy'

Linguists believe the word came from "jasm," which referred to vitality. Its earliest known appearance in print dates back to 1912, referring to a baseball pitcher's curveball. It began being used to describe music a few years later.

The printing press spread novels widely

Johannes Gutenberg's invention of the printing press in 1440 changed how writing was reproduced. It allowed multiple manuscripts to be copied via movable type rather than by hand, making more literature more widely available. Over time, that change caused literacy rates to rise, creating a market for even more literature.

The term schizophrenia was coined by Swiss psychiatrist Eugen Bleuler in 1908

He launched the word during a lecture at the German Psychiatric Association in Berlin. In his talk he focused on the splitting of psychic functioning as a defining feature of the disease and noted it wasn't associated with dementia or factors like early puberty onset.

The word 'jazz' evolved from 'jasm,' 19th-century American slang for 'energy'

Opera terminology heavily relies on Italian

Most commonly used Opera terms are not in English. This glossary provides definitions of keywords like “libretto,” the text of a piece, “tenor,” the highest natural adult male singing voice, and “diva,” a female opera star.

The story behind the little Scottish village in the Italian Alps

High in the Italian Alps is Gurro, a small village with a distinct Scottish flair that can be found in its food, clothing, language, and music. At first glance, it may seem like a curiosity, but, as one resident explains in this short video documentary, there's a perfectly reasonable explanation for how an Italian town became known as a Scottish hamlet.

The term 'gerrymander' dates back to a 1812 Boston dinner party

The term "gerrymandering" arose when Massachusetts Governor Elbridge Gerry approved a state senate map with a district so contorted it resembled a salamander. Critics dubbed it the "Gerry-mander," cementing the term for partisan map manipulation.

The Brothers Grimm were lawyers before they were storytellers, and became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.

The term 'algorithm' originated from the Latinized name of al-Khwārizmī, a 9th-century mathematician whose works introduced Arabic numerals and the decimal-based numeral system to Europe and whose treatise 'Al-Jabr' gave algebra its name.

The original copy of the Declaration of Independence is not a pristine document, and even features a smudged anonymous handprint in the bottom left corner.

Learn more about the history of fireworks, which dates back to an accidental invention during an alchemist's quest for information about immortality.

Art theft is the third-largest source of criminal revenues worldwide, thanks in part to the subjective nature of valuing a work of art.

American dance legend Martha Graham, sometimes called 'the Picasso of dance,' refused to perform at the 1936 Olympics in Berlin and conceived the piece 'Chronicle' in response to the experience.

'Grand Canyon of the Yellowstone,' a work by American painter Thomas Moran, inspired Congress to establish Yellowstone National Park.

Poison ivy's characteristic rash is caused by an allergic response to an oily compound in the plant called urushiol.

Volcanic activity may have triggered the Black Death by spewing gases that led to crop failures in Europe, thus forcing the import of grain ships with plague-infested fleas.

Some coin denominations have ridges etched on their sides, partly to prevent counterfeiting, in a practice called 'reeding.'

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

Gerrymandering works through two techniques: cracking opposing voters across districts to dilute their power, and packing them into a few to waste their votes in lopsided majorities.

The concept of phantom limbs, the perception that amputated limbs are still present, dates back to a French military surgeon in the 16th century.

Shooting stars, or meteors, are fragments of asteroids and comets that burn up as they enter Earth's atmosphere, creating streaks in the sky called meteor showers.

The American cockroach is actually from Africa, an apparent hitchhiker aboard ships carrying enslaved people, with evidence suggesting the bug may have arrived in the New World as early as the 1600s.

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.

See photos of Meteora, a mountainous site in central Greece, home to 14th-century monasteries perched atop soaring outcroppings.

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.

As of 2025, the most cited papers in science include a review of graphene, methods to improve image recognition, streamlining electron density calculations, and optimizing protein studies.

Apeirophobia is an overwhelming fear of living forever, perhaps stemming from the brain's inability to conceptualize an infinite life.

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.

El Niño, Spanish for 'the boy,' was named after Jesus Christ because the phenomenon resembled the weather changes observed around Christmastime.

Corals are themselves not coral reefs—the term refers to the tiny marine invertebrates that build the rigid reef.