Twain invented a clasp that's still used for bras

Twain didn’t start wearing his iconic white suit until later in life

The writer first wore the white suit in 1906, at the Library of Congress. “I have reached the age where dark clothes have a depressing effect on me,” Twain told the Washington Post. “I prefer light clothing, colors, like those worn by the ladies at the opera.”

Clemens' pen name 'Mark Twain' is a nautical reference

Samuel Clemens became a steamboat pilot’s apprentice in 1857 while writing a travelogue for a small newspaper, and earned his pilot’s license two years later. During that time, he learned the term “mark twain,” which meant 12 feet, something shipworkers would yell when they were approaching shallow waters. In 1861, he signed a travel letter under the pseudonym “Mark Twain” and used it for the rest of his career.

A Connecticut man claims he invented the wrap

Bobby Valentine, a Connecticut-based restaurateur, claims that the burrito-inspired item was invented because someone requested a club sandwich on a day when his toaster was broken. Improvising, Valentine threw all the ingredients into a tortilla and put it on a $4 grill.

The treadmill was invented as a machine for prison labor

William Cubitt invented the machine in the early 1800s, imagining prisoners, usually two at a time, would use it to grind grain or pump water.

Breaking down 'clinch covers,' a defining characteristic of '80s romance novels

As romance novels became more popular in the 1980s, publishers leaned into the books' steamier content by advertising it on their covers. Eventually, one specific kind of portrait emerged: the clinch cover, which featured a muscly man, usually shirtless, holding a woman against his chest. This episode from 99% Invisible explores the history of the trend and why it's largely disappeared from modern romance novels.

The first recorded worker strike in the United States happened in 1768

That year, journeymen tailors went on strike to protest a wage reduction. By 1794, cobblers in Philadelphia formed the nation’s first trade union, the Federal Society of Journeymen Cordwainers. But that’s just the beginning of labor union history in the US.

Thomas and Anne Rogers were famous counterfeiters in 17th-century England

The pair used a practice called “coin clipping,” shaving the edges off silver coins to decrease their weight before sending them back into circulation. When banknotes rather than coins gained popularity, counterfeiting methods evolved—in the 1700s, an early banknote counterfeiter named Mary Butterworth created counterfeit paper money using starched cloth and a hot iron to transfer the pattern of a banknote onto paper.

Why Men's Legs Were Everything

From codpieces to cotton hose, here's the surprisingly loaded history of men's legs, and why 18th-century Europe couldn't stop staring at them.

Bow ties became a Bill Nye wardrobe staple after he took part in an athletic banquet

In high school, boys served as waiters during a ceremony where girls would receive awards for gymnastics, lacrosse, and other sporting events. Wanting to fit the role, Nye's father helped him dress like a waiter, and he continued wearing bow ties upon seeing their practicality in the lab.

Mark Twain spent decades feuding with the US Postal Service, convinced its costs and regulations were bureaucratic overreach.

How nylon was created

Nylon, one of the most ubiquitous materials in the world, was invented in 1935. Chemist Wallace Carothers was hired by American conglomerate DuPont to perform research. After seven years of work he produced nylon, the first wholly synthetic fabric. Carothers’ life ended tragically, but his contributions revolutionized everything from military equipment to women’s fashion.

One prankster started a movement to clothe animals in the mid-20th century

G. Clifford Prout founded the Society for Indecency to Naked Animals, saying that animal nudity was rude and immoral. The campaign continued for years until CBS employees realized Prout was actually a comedian named Buck Henry.

Salvador Dalí’s collaborations with fashion designers

Dalí was known to dabble in the world of fashion and formed a bond with the bold Italian designer Elsa Schiaparelli. Their collaborations birthed iconic designs like a bureau-drawer suit and a lobster dress.

Truth is best known for her 1851 speech in Akron linking abolition and women's rights

At the 1851 Women's Rights Convention, Truth gave a speech that cemented her legacy, weaving together abolition and women's rights in remarks that became among the most quoted of the 19th century.

Trace how the Bill of Rights, inspired by centuries of political theory, took shape between 1774 and 1789.

Before the invention of transistors, vacuum tubes made radio possible

Discovered by Thomas Edison, vacuum tubes allow electrical currents to travel through empty space. Later modified into a diode—keeping current flowing in only one direction—vacuum tubes allowed electronics to turn alternating current into direct current.

The first smartwatch was made by Microsoft in 1994

Coproduced by Timex, the Timex DataLink 150 featured a small LCD screen and could transfer data to and from a Windows PC. Like the Windows XP Tablet that launched in 2002, the smartwatch did not sell well, and both products are considered to have been released before their time.

How the Inca used threads to communicate

One of the great mysteries of ancient Peru is that the Inca did not have a system of writing, but communicated with a system of strings tied with knots. This 4-minute video explores its possible uses.

Tinker v. Des Moines affirmed that students maintain the right to free speech at school

In 1969, the Supreme Court ruled that two Iowa teenagers had the right to wear black armbands to school in protest of the Vietnam War, establishing that students retain First Amendment protections in public schools.

Women in WWII used tattoos to avoid capture

During World War II, Japanese soldiers kidnapped women from Southeast Asian countries and forced them into sexual slavery. But they hesitated to capture married women, a fact that women from the island of Timor exploited, painstakingly poking tattoos onto their bodies that marked them as married women.

Richard Cadbury invented the heart-shaped chocolate box in 1868

Richard's father, John Cadbury, founded the Cadbury Brothers chocolate company (now known simply as Cadbury) in 1824. Richard recognized the popularity of ornamental designs (especially for Valentine's Day gifts) and designed the heart-shaped box for the company's chocolates, which became a staple of the holiday.

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...

Da Vinci’s ingenious self-supporting bridge

Without using glue or nails, the brilliant polymath Leonardo Da Vinci was able to construct a sturdy bridge of wood logs. This video unpacks the genius civil engineering behind this concept and offers a visual demonstration of how it worked. See how Da Vinci accomplished this feat without using permanent parts, and how his bridge got even stronger as weight and force was added.

Thingiverse is a massive free library of 3D-printable designs

The site—which was launched in 2008 by 3D-printer manufacturer MakerBot—hosts more than 2 million user-generated design files to build everything from prosthetic hands to replacement dishwasher parts (or the "Golden Snitch" from "Harry Potter). The community behind it rapidly designed and shared files for face shields and ventilator components amid the COVID-19 pandemic.

Thomas Jefferson displayed a bust of Hamilton at Monticello

Thomas Jefferson displayed a bust of Alexander Hamilton at Monticello—signaling his enduring respect for Hamilton's intellect and historical importance despite their deep ideological divide.

Tinder revolutionized dating when it introduced swipe-based interactions

Many dating apps today allow users to "swipe right" to match with someone and "swipe left" to opt out of the match, but Tinder did it first, introducing swipe-based interactions in 2013. The idea for swipes came from the founder's desire to gamify dating—Tinder's early interface was based on a deck of cards that users could sort.

Trademarks protect the branding of a service or product, while patents protect the product or service itself

Trademark protections cover the branding of a service or product, like its logo, its smell, or even its shape. However, patent protections give inventors exclusive control over a new product—as long as those inventors disclose how the product works and how they made it.

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

Jimmy Carter signed a 1978 bill that legalized home brewing, a move credited with kick-starting the craft beer industry.

The first robot in literature may have been a 'mechanical man' in 1907's 'Ozma of Oz,' a book in L Frank Baum's 'Wizard of Oz' series.

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

To reduce wrinkles in clothing, research recommends gentle wash cycles with more water and tumble drying with smaller loads and longer times.

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

For centuries, Niagara Falls has been a magnet for daredevils seeking to conquer one of nature's most powerful wonders, with its 200-foot drop and water rushing at 32 feet per second with 280 tons of force.

In its famous catalog, Sears sold $600 DIY house kits from 1908 through the 1940s, resulting in an estimated 100,000 'Sears and Roebuck homes.'

While the first exchange-traded fund (a 'basket' of different assets that can be bought and sold on a stock exchange) in the US only launched in 1993, the global ETF market has grown to more than $10T in the short time since.

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.

The animatronic shark from Steven Spielberg's 'Jaws,' the first modern blockbuster, was a complex underwater apparatus called 'Bruce.'

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

Watch this video that uses Lego bricks to explain how venture capital works.

Quincy Jones' 'Big Band Bossa Nova' helped introduce bossa nova—a jazz-influenced Brazilian genre—to the US

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.

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

The Mona Lisa's celebrity status and repeated restorations have obscured what made the painting so revolutionary for its time

After 25 people used virtual reality headsets to practice flying with virtual wings—flapping their arms—their visual cortex responded to the wings almost as if they were real arms, treating them as body parts.

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

Fast-casual restaurant Chili's is experiencing a resurgence, with its parent company recently reporting a nearly 32% increase in sales, thanks to passionate Gen Z fans on TikTok.

Sony set the standard for cylinder-shaped batteries when it repurposed manufacturing equipment used to make rolls of magnetic recording tape.

The American Society of Civil Engineers' infrastructure report card gave the US a C in 2025, its highest grade since the project launched in 1998.

Brandi Chastain, the star of the 1999 US victory over China in the 1999 Women's World Cup, was a last-second choice to take the penalty kick that sealed the victory.