Early toothbrushes were likely made from the coarse hairs of a cold-climate hog in China—and the trend stuck, with boar bristles used for more than 400 years.

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.

The ancient human fossil record is filled with specimens with pretty nice teeth. So why do modern humans have dental problems? Scientists can't be certain, but one hypothesis suggests the evolutionary shrinking of the human jaw crowded our mouths,...

Companies produced items like waterproof radios and targeted them at people under 30, marketing the devices as hip ways to stay clean.

Instead of a messy cream, which had been the norm in the 1940s, a new roll-on deodorant inspired by the easy flow of a ballpoint pen debuted in 1952.

Edison strung electric bulbs outside his laboratory in 1880, and his business partner Edward H. Johnson first wrapped a tree in lights in 1882. It wasn’t until the lights were commercialized in 1917 that they became common in household Christmas decorations.

In 1869, the first synthetic polymer—celluloid—was created as a substitute for ivory in billiard balls. It became the historical catalyst for the eventual manufacturing of plastics everywhere as an alternative to the depletion of other natural resources, including tortoiseshell and horns.

Despite their Russian origins, roller coasters are often associated with the US. This is in part thanks to a businessman and inventor named LaMarcus Thompson, who revolutionized the amusement industry in the US beginning with the Gravity Pleasure Switchback Railway at Coney Island. He is now known as the "father of the American roller coaster."

While bidets are a typical household essential in Europe, Asia, and South America, they remain uncommon in the US. Associations with infertility, the aristocracy, and brothels helped fuel their unpopularity in the states.

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 first EVs ran on rechargeable lead-acid batteries, which could travel 60 to 80 miles on a single charge. Women preferred these vehicles, which were quieter, less smelly, and did not require turning a hand crank to start the engine.

The beard has gone in and out of fashion for centuries in Britain. It was hated in the 18th century but became a must in the 19th. This quick list rehashes 15 fascinating tidbits about the beard, including possible useful functions for them (a beard is equivalent to an SPF 21 sunscreen) and how barbers were often also surgeons.

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.

Flossing is a typical recommendation from US dentists as a low-risk method of reducing plaque buildup on your teeth. However, in many parts of the world, especially France, the practice is not a cultural norm. This article explores reactions from French natives to the idea of flossing and examines the surprising lack of studies proving (or disproving) the efficacy of using floss.

They were most common in cities, where battery swap stations allowed drivers to "refuel" their vehicles reliably. Innovations in combustion engines caused electric cars to lose ground until environmental policies and advances in battery technology revitalized interest.

In 1884, Thomas Parker invented the first practical electric car in London. By the turn of the century, early EVs were seen on the streets of Washington, DC. Automaker promotional materials included photographs of cars on mountain roads and other terrains.

Selling drinking water in America began at resorts in New York and West Virginia, where tourists were encouraged to take the regenerative mineral water back to their homes.

Pre-sliced bread has only been with us for almost 100 years, but during the course of World War II it was briefly banned to save on supplies like wax paper and stainless steel for the war effort. This Atlas Obscura article explores this amusing (though not at the time) bit of food during wartime history.

Wyn Swainson, an English literature graduate student, filed a patent in Denmark for a system that scans an object and uses the scanning data to rebuild it using lasers that harden light-sensitive plastic. However, he never developed a working prototype. The idea originated from wanting to produce recreations of sculptures.

Before the electric microphone, vocalists needed to project to have their voices captured. The new technology, however, made softer, more intimate singing possible, leading to a new style of singing that took off in the late 1920s, with "crooners" becoming some of the first American pop stars.

Nicknamed the "unicorn of the sea," narwhals have no teeth aside from two canines that grow directly forward as tusks. For roughly 85% of females, they stay embedded in the bone. For males, they grow into large, spirally tusks that are full of nerve endings and blood vessels. Scientists today believe that tusks likely formed for sexual selection purposes and eventually evolved to assist in other processes, such as hunting.

The electric microphone provided enhanced audio and greater portability, saving the fledgling record industry and making recording outside of New York and Camden, New Jersey, possible. This proved critical for capturing early country and rock ‘n’ roll.

The product was marketed toward women and framed excessive sweating as a medical disorder that needed to be addressed with the product.

Consumer loans for agriculture were likely first used around 3500 BCE, but modern consumer credit took many more centuries to be established. England's credit reporting system, for instance, dates back to the early 1800s when a group of English tailors began swapping information about customers who failed to settle their debts.

Vikings, the medieval marauders of northern European land and seas, were actually famous for their excellent hygiene. Despite this, evidence from Viking burial grounds points to one exception: their teeth. Roughly 60% of those Vikings studied had at...

The practice of lighting Christmas trees with electricity didn’t begin until the late 1800s. Before that, families used wax candles on branches—a dangerous tradition that originated in 16th-century Germany.

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.

LaMarcus Thompson was an inventor and businessman who developed the first US amusement park ride in the 19th century and sparked a booming business. Customers spent a nickel to coast on wheeled benches over gentle hills, leaving Thompson with around $600 per day in profits.

In the early 1800s, bonds were used to fund US railroads and canals in Great Britain. “Liberty Bonds” were sold during both World Wars in the 20th century. Learning about the early and modern history of bonds can offer a glimpse into how the modern bond market came to be.

Archaeologists discovered Egyptian mummies with nail art and henna-tinted fingertips. The trend would continue informally for centuries until Revlon introduced modern nail polish in 1932.

Health food stores began opening in the ‘50s, though they were primarily focused on vitamins and holistic supplements. Natural food stores, however, provided pesticide-free produce and often relied on local farmers for their products. One of the first was New Age Natural Foods, in San Francisco’s Haight-Ashbury neighborhood, which opened in 1965.