As a child, Twain worked as a 'printer's devil'

Twain was a notoriously bad investor

After becoming a famous writer, Twain invested in railroad stocks, a magnetic telegraph, and a printing press that weighed four tons. Eventually, he founded his own publishing company, which ultimately led to his bankruptcy. “He is, in business,” one lawyer said, “just a big overgrown boy.”

Twain started writing 'The Adventures of Huckleberry Finn' to distract himself

In 1876, Twain mentioned that “a double-barreled novel” he’d been working on was essentially dead. Instead, he began working on “another boys’ book—more to be at work than anything else.” That book was “The Adventures of Huckleberry Finn,” the text that would go on to define American literature.

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.

Twain grew up in Missouri near the Mississippi River

When Twain (then known as Samuel Clemens) was 4 years old, his family moved to Hannibal, Missouri, a port town along the Mississippi River. Hannibal would eventually be the setting for two of his most famous works: “The Adventures of Huckleberry Finn” and “The Adventures of Tom Sawyer.”

Mark Twain once challenged a rival newspaper editor to a duel

While writing for a newspaper in Virginia City, Nevada, Twain published a story about a local fundraiser, accusing the paper’s rival of rescinding their donation. The problem was that the story was untrue: It was a hoax that he had concocted while drunk. The affair led to a protracted, public back-and-forth, with Twain challenging the editor of the rival paper to a duel; likewise, two other men challenged Twain to a duel. Twain ultimately left town, but wrote about the episode later on in an essay titled “How I Escaped Being Killed in a Duel.”

Twain served in a Confederate militia for two weeks

In 1861, a 25-year-old Twain joined the Marion Rangers, a pro-Confederate militia. The group disbanded after two weeks upon hearing that Ulysses S. Grant, General of the Union Army, was headed their way. Twain moved to Nevada, where he eventually took a job at a newspaper.

He made a name with a short story about jumping frogs

Twain’s first big break came with “Jim Smiley and His Jumping Frog,” a fictitious story that appeared in a 1865 edition of the New York Saturday Press. (When it was republished elsewhere, the title was changed to “The Celebrated Jumping Frog of Calaveras County.”) That year, American poet James Russell Lowe called it “the finest piece of humorous literature yet produced in America.”

Whitman left school at 11 to help his family

The poet's family was poor and moved several times during his childhood. At 11, his father removed Whitman from school so he could work to support the family.

Dickens' childhood job influenced his novels

After his father was imprisoned, Dickens took up work in a shoe-blacking factory. His novels often featured hardscrabble protagonists, many of them children, forced to navigate the grim realities of the Industrial Revolution. Today, stories that follow in that model are described as "Dickensian."

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

Understanding Thoreau's critique of American work

John Kaag, a coauthor of "Henry at Work: Thoreau on Making a Living," explains how the writer is often mischaracterized as a layabout who avoided responsibilities. Kaag, though, notes that Thoreau was a jack-of-all-trades—working as a schoolteacher and a handyman, and even for his father's pencil-manufacturing company—who came to believe that relentless striving was getting in the way of authentic living.

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.”

Thomas Edison captured the only known footage of Mark Twain

The inventor was a pioneer in the early film industry and made his own motion pictures. In 1909, he shot a short film featuring Twain at Stormfield, his property in Connecticut. In it, Twain wears his iconic white suit and drinks tea with his daughters.

The story of Sweeney Todd was first told in 1800s penny dreadfuls

The demon barber of Fleet Street made his first print appearance between the pages of penny dreadfuls, cheaply made serials filled with grisly tales and sold for a single penny. The tale of Sweeney Todd was published in 18 parts over the course of 18 weeks between November 1846 and March 1847. The series was expanded into 92 parts and later gathered into a single volume published in 1850.

The typo that scandalized a continent

One printing mistake in the 17th century proved so unfortunate it cost two men their careers and scandalized religious folks for centuries. Read the story here.

Shakespeare's father was a professional ale taster

The Bard's dad was Stratford-upon-Avon's official "conner," the title reserved for those who tested the strength and quality of locally brewed ale. The job was not as easy as it might sound: He was expected to see if the ale had spoiled, meaning he sometimes had to drink bad beer.

'Johnny Appleseed' was the itinerant horticulturalist John Chapman

Born in 1774 in Massachusetts, Chapman planted apple orchards for pioneers across Pennsylvania, Ohio, and Indiana, to be sold to locals to produce hard cider. He became famous through a 'Harper's Weekly' profile in the late 1800s, cultivating the modern legend.

Hamilton learned about global trade before he was a teenager

Before he moved to America, Hamilton worked as a clerk around age 12 at the Caribbean trading firm Beekman and Cruger, handling shipping documents, inspections, and port logistics. He eventually managed the day-to-day operations of a trading charter that immersed him early in Atlantic commerce.

What it’s like to be an apprentice at Frank Lloyd Wright’s Taliesin

Architect James Walter Schildroth became an apprentice in Frank Lloyd Wright’s Taliesin Fellowship program in 1959, just months after Wright's passing. The invaluable experience taught him how to build as he worked and confronted him with the struggles of living in the space.

Before starting Apple, Steve Jobs cold-called HP at 12 years old and got a summer job

As a leader, Jobs was both admired and resented for his unwavering commitment to his vision, which led him to push his colleagues beyond their limits. Jobs once told a rival computer executive that he'd make a product so good, they'd buy one for their kid.

Watch the engineering challenges overcome in turning a 3D printer into a tattoo machine

The DIY project required reprogramming the printer to operate on a curved, 2D surface rather than making flat layers in 3D, editing replacement firmware to bypass temperature safety checks, and developing a rapid system to stop the tattoo in case of an emergency. The final product printed "LEG" on a volunteer's leg.

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.

Read Truth's account of escaping slavery in 1826

After her enslaver broke his promise to free her, Truth left before dawn, carrying her infant daughter and a bundle of clothes. She later found refuge with the Van Wagener family, who paid her master $20 for her freedom and $5 for her infant daughter.

Thomas Edison, eager to communicate with ghosts, tinkered with an apparatus called the 'spirit phone'

The inventor was interested in developing a scientific method for communicating with the dead. He was not interested, though, in the occult figures who believed the dead could be reached through Spiritualism, which he found childish. He believed those kinds of people "permit themselves to become, in a sense, hypnotized into thinking that their imaginings are actualities."

The United States had a washing machine that cleaned dirty dollar bills

In the early 1900s, the US Treasury Department had a machine that washed and ironed old, soiled paper bills. The machine helped the Treasury save money by decreasing printing costs for new dollar bills, but had nothing to do with the modern understanding of money laundering.

Flannery O'Connor originally wanted to be a cartoonist

In college, the famed writer worked as a cartoonist for the school newspaper and literary magazine, using surreal black-and-white linoleum prints to comment on everything from student life to World War II.

Before writing 'Walden,' transcendentalist Henry David Thoreau nearly burned down his hometown with a campfire that grew out of control.

Salvador Dalí believed he was his own dead brother, who had died nine months before he was born

The tragic Pulitzer Prize-winning image 'The Vulture and the Little Girl' (1993) generated controversy, raised concerns about ethics in photography, and eventually led to the photographer's death.

Mid-century modern graphic designers, known for their bright colors and bold lines in advertising, also found success with children's books.

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

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.

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

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.

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.

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

20,000 letters to the advice columnist 'Dear Abby' provide insight into prevailing sex, religion, and LGBTQ fears, anxieties, and concerns from the 1950s onward.

Sears sold DIY house kits starting at $600 in its famous catalog from 1908 through the 1940s, resulting in roughly 10,000 'Sears and Roebuck houses' being built.

Famed poet TS Eliot rejected the manuscript for George Orwell's political fable 'Animal Farm,' writing that its criticism of authoritarianism was not 'the right point of view.'

In 1915, workers recovered a submarine-like vessel from the Chicago River, prompting fears of German espionage

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.

The Ramones' 'Pet Sematary,' the theme song for the Stephen King novel of the same name, was written while the band was admiring the writer's collection of horror memorabilia.

Children are now three times more likely to say they want to be a YouTuber when they grow up than an astronaut, with some even attending 'YouTube camps' that teach kids how to create content for the platform.

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

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.

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

Objects can be 3D printed with light by projecting 2D computerized tomography (CT) scans onto rotating cylinders of resin, which solidify upon exposure.

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

Domino's Pizza's 30-minute delivery guarantee was responsible for the chain's 1980s surge, but it was discontinued after the company was found liable for delivery driver accidents.

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