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

'Muggle’ entered the Oxford English Dictionary in 2003

The Harry Potter term for a nonmagical person became an official English word when the Oxford English Dictionary added it in 2003—cementing the series’ influence on modern language and popular culture.

Ghosts didn't say 'boo' until the 19th century

The word derives from Scotland in the early modern era and was often used to assert oneself. Eventually, it became a way to startle someone, and by the 19th century, was the go-to utterance of literary spirits.

Halloween originated with the Celtic festival of Samhain

Halloween, a holiday primarily popular in the US and Canada, originated 2,000 years ago with the Celtic people. The Celts interpreted this transition as when ghosts returned to the land of the living, leading to rituals like feasts, bonfires, and wearing costumes made of animal body parts on Oct. 31.

There are 5 key reasons why people carry out hoaxes

While it's hard to pinpoint just one motive for trickery, many cases indicate that hoaxers are seeking attention. Other reasons include making a profit, or simply that fooling others is fun.

The word ‘hip-hop’ is often credited to DJ Lovebug Starski

The name was coined by Bronx DJ Lovebug Starski, who ad-libbed the term to match the rhythm of a beat while he was rapping. While it began as nonsense, the term went on to describe the music and multifaceted culture that surrounded it.

'Creepypasta' is a meme that has its roots in folklore

The genre of crowdsourced, horror folklore comes from copypasta, a term that refers to snippets of content copy-and-pasted online ad nauseam. These memes' allure stems at least partly from how they seemingly rise from nowhere, with tales crafted by many hands over many iterations.

Why some people say the moon is made of cheese

Mental Floss digs into the history behind the fable, which dates back as far as the 1500s, when it was mentioned in "The Proverbs of John Heywood." Even NASA has gotten in on the joke, tweeting a (supposedly) doctored photograph showing the moon's expiration date.

The term ‘mortgage’ was born out of the French word for ‘dead pledge’

Borrowing money to buy a house has been a global practice since the Romans in the fifth century BCE. But before the mortgage, there was the “dead pledge,” which labeled the property as “dead” to the borrower until they paid off their loan to the lender.

Houdini recalls how he became 'Handcuff King'

Illusionist Harry Houdini rose to fame through his many escapes, like from the handcuffs slapped onto his wrists by Los Angeles police in 1899. In this 1907 Los Angeles Herald article, Houdini recalls some of the many times he's thwarted attempts to...

What exactly are hiccups?

If you don’t know a surefire cure for hiccups, it’s not really a surprise—while there are some known facts about this funny affliction, a surprising amount remains a mystery. Doctors believe that a round of hiccups usually either comes from...

Dr. Seuss was likely the first to use the word 'nerd' in print

The word appeared in 1950's "If I Ran the Zoo," but there are theories that the word (or forms of it) were already part of popular slang before the book was published.

The word ‘coupon’ comes from a French word meaning ‘to cut’

The history of coupons starts in the US with the Coca-Cola coupon that was mailed to consumers, offering them a chance to come try the soda for free in a nearby pharmacy. A coupon created by cereal company Post is one of the earliest widely cited follow-ups—it offered a penny off a box of Grape Nuts in 1909.

The history of curse words

While profane language is frowned upon in many circumstances, it remains an important part of human expression. This article explores the history of taboo words, and how they eventually creeped more into the mainstream. From 19th century Irish folk-saying “bejabbers,” to the dirty language in comedy routines by Lenny Bruce and George Carlin, discover a brief history of the swear words that have now become more prevalent in society.

The Hollywood sign originally said 'Hollywoodland'

The original sign, which was only intended to be up for 18 months and erected around 1903, advertised a new housing development in the Hollywood Hills. In 1949, the Hollywood Chamber of Commerce shortened it to "Hollywood."

The first horror movie is believed to be George Méliès' 1986 short 'The Haunted Castle,' which pioneered the use of special effects

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

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

The word was first used in 1851 to describe the ancient inscriptions on Pompeii's walls. "Graffiti" is the plural form of "graffito," which means "a scribbling."

During Prohibition, 'happy hour' became the go-to term for illegally having a drink after work before heading to dinner

This article provides a timeline of happy hour’s shifting shape in US culture, from the first recorded happy hour on a US Naval ship to today’s happy hours that sometimes include non-alcoholic beverages. It also details how prohibition actually helped establish the tie between alcoholic beverages and happy hour.

Dozens of common phrases are attributed to Shakespeare

His clever wordsmithery infiltrated English, from “Neither rhyme nor reason” to “In my heart of hearts.” This article lists nearly two dozen of his best-known phrases.

The term 'cancer' is 3,000 years old

Around 400 BCE, Hippocrates is said to have named masses of cancerous cells "karkinos"—the Greek word for crab. Science and medical historian Dr. Howard Markel discusses a few hypotheses on why Hippocrates named the disease after a crab and how well cancer was understood in the ancient world.

Reports of a recording of Whitman's voice are said to be a hoax

A recording of Whitman reading a portion of his poem "America" has been mass-produced and broadcast, but the Library of Congress and other scholars say the recording is a hoax.

The hour originated from an ancient Egyptian astronomical system

The movements of astronomical objects, measured in a day and a year, form the foundation of our sense of time. The Egyptians divided each day and night into 12 time eras, using arbitrarily selected stars as references rather than movements of specific celestial objects.

Clever Hans was a 1900s horse that was believed to be able to solve math equations, tell time, and read and comprehend German, until a psychology student discovered how he got his answers.

How facts, hypotheses, theories, and laws in science differ from everyday language

Facts are observations of the world, and they can be pooled together for a given phenomenon to develop a hypothesis—a proposed explanation consistent with observations that requires further investigation. Experiments and additional data can rule out many hypotheses or graduate a proposed explanation into a widely accepted and validated theory.

Hubble overcame early optical failure and became a critical scientific instrument

The flaw in Hubble's mirror was smaller than the width of a human hair, but fixing it required a space mission as complex as a Hollywood rescue story—with astronauts installing corrective optics like contact lenses for a giant eye in the sky.

Hustle culture is what happens when the belief that working extremely hard will put people on the path to success becomes the norm in a workplace or other group

From pulling all-nighters at the office to never taking a weekend off, hustle culture has been known to lead to employee burnout. The Worklife with Adam Grant podcast explains hustle culture and its effects in depth in this episode.

The Illuminati were a real espionage society in the 1770s

Bavarian professor Adam Weishaupt founded the group in 1776 as an anti-clerical, anti-royalist sect that used hierarchy, codes, and surveillance as a proto-spy network. Within a decade, it was suppressed, but the mythology never quite died. Today, it functions as an adaptable conspiracy theory, able to fit any era's anxieties about who really holds power.

How a 19th-century aristocrat scammed the rich to buy fake Caribbean land

Nearly 200 years ago, Gregor MacGregor pulled off one of the most brazen real estate scams in history. A disgraced military leader, MacGregor sold plots of land in what is today Honduras, touting the country of Poyais as a new major region in South America. But no building was taking place, and instead of investing the proceeds of bond sales in construction, MacGregor was lining his pockets. Read the unbelievable story of MacGregor's exploits here.

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

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

According to the physics of black holes, our 4D reality may be a hologram—a projection of information coded on a 2D surface on the edge of the universe.

In 2009, the nation was gripped by the story of a missing young boy who was believed to be floating over Colorado in a homemade balloon, until it was revealed that he was at home the whole time.

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

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 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.

Hedge funds, the private investment firms that trade a wide swath of financial assets, make money by imposing steep fees on investors and from the fund's investment performance.

Some Pokémon have been named after real and fictional organisms, while some real-world species have been named after Pokémon, such as Chilicola charizard and Binburrum zapdos.

Existentialist writer Jean-Paul Sartre coined the famous phrase 'Hell is—other people' in his play 'No Exit'

For centuries, it was common to sleep in two shifts: a few hours at the beginning of the night, and a longer period beginning around midnight

The hormonal disorder PCOS was renamed PMOS in 2026, a move designed to improve care and research by shifting the focus to the hormonal causes of this condition that affects 1 in 8 women.

Elk Cloner, the first computer virus to spread in public, was written as a practical joke by Richard Skrenta, a Pittsburgh high school student.

Fear or disgust related to clusters of holes and cracks, called trypophobia, may stem from evolutionary processes to help us avoid pathogens.

Take a 3D tour of the Hajj, Islam's annual pilgrimage to Mecca, undertaken by over 1.5 million Muslims.

During the French Revolution, a botanist's letter asking about "dear Rhus" (poison ivy) was intercepted, leading authorities to suspect he was conspiring with the Russians.

American short story writer Flannery O'Connor raised 40 peacocks, which became potent symbols for her fiction's elegant violence

US housing costs have risen by roughly 175% between 1991 and 2026—but a growing number of Gen Zers are becoming homeowners anyway. In 2025, 4% of homebuyers were Gen Z, up from 3% the year before.

Memecoins are a type of cryptocurrency—a form of digital currency with a wide variety of uses—created around popular 'memes,' or viral internet jokes.

After her fellow cult members tried to kill her with an LSD-infused hamburger, one member of the Manson Family, the murderous cult led by Charles Manson, decided to testify against the group's leader.

Volcanoes 'die' when their supply of magma runs out, if they are shifted away from their underlying magma reservoir, or if they get clogged by collapsing or their magma cooling back into rock.