1

Duct Tape Was Made to Protect Ammunition Cases

During World War II, the ammunition boxes sent to American troops were sealed with paper tape and dipped in wax to keep water out. Soldiers were supposed to pull a small paper tab to open them quickly. But the thin tape could tear, leaving them struggling to reach the ammunition. Vesta Stoudt, who packed and inspected these boxes at the Green River Ordnance Plant in Illinois, recognized this danger. She also had two sons serving in the U.S. Navy, so she devised a solution.

Stoudt proposed replacing the paper tape with a strong, waterproof cloth tape that soldiers could easily pull off. As she had no response from her supervisors, she wrote directly to President Franklin D. Roosevelt, including drawings of her idea. Roosevelt sent the proposal to the War Production Board, which asked a Johnson & Johnson operating company to manufacture the tape. It not only worked, but troops soon used the strong tape to repair boots and fix military vehicles too. Today, duct tape is still the solution to many everyday repairs.

2

M&M’s Were Designed With Soldiers in Mind

You probably remember the iconic M&M's slogan "melts in your mouth, not in your hand." Well, this characteristic was intentionally created for troops, allowing them to eat chocolate even under the hot sun.

When businessman Forrest Mars Jr. was travelling to Spain in the late 1930s during the Spanish Civil War, he observed how soldiers ate chocolate encased in sugar shells. The sugar crust prevented the chocolate from melting, and soldiers could enjoy the treat, even in hot temperatures. Mars soon partnered with Bruce Murrie, the son of Hershey's president, to secure a steady supply of chocolate for American troops. Their collaboration led to the creation of M&Ms, named after the initials of their last names. By 1947, the candy was made available to the public.

3

The Jeep Was Built for the U.S. Army

In 1940, the U.S. Army asked automakers to create a small four-wheel-drive vehicle that could carry soldiers across rough terrain. Bantam, Willys, and Ford entered the competition, and Willys won the main production contract. However, the final Willys MB also borrowed some of Ford’s flat grille and hood fastener design.

The new Jeep could travel through mud, climb steep roads, and reach places trucks couldn’t. Soldiers and mechanics could repair it quickly, and its parts were easy to remove and replace. Soldiers liked it so much that demand continued after they returned home, and Willys introduced the civilian CJ-2A in 1945 shortly after the war ended. The modern Jeep Wrangler still carries the same adventurous spirit.

4

The Slinky Started With a Naval Engineer’s Spring

In 1943, naval engineer Richard James was developing a spring to keep equipment steady on ships during rough seas. One day, he knocked one of his experimental springs onto the floor. Instead of falling in one place, it moved end over end. James rapidly realized its potential as a toy.

He spent the next two years finding the right size and tension for the spring. His wife, Betty, named it "Slinky," because of its smooth movement, and they introduced it to the market in 1945. But shoppers were confused and didn’t know what to make of it at first. The situation changed after James demonstrated it at a Philadelphia department store: all 400 Slinkys were sold in less than two hours.

5

Super Glue Emerged From Wartime Research

Today, we use Super Glue to repair broken items, for crafting, woodworking, and for countless quick fixes. But in 1942, chemist Harry Coover created it while trying to make a clear plastic for military gunsights during World War II. He was testing chemicals called cyanoacrylates when his team found that they stuck to almost everything they touched. As that feature made them unsuitable for the original project, the researchers moved on.

Coover encountered the chemicals again in 1951 while his team was developing materials for jet canopies. This time, he realized that their powerful bond was useful because it required no heat or pressure. Kodak later refined the adhesive and released it as Eastman 910 in 1958. That accidental discovery became widely known as Super Glue.

6

Silly Putty Grew Out of a Search for Synthetic Rubber

Silly Putty is that stretchy stuff that comes in plastic eggs and bounces and bends, depending on how you pull it. It was created during World War II, when rubber was needed for tires, boots, gas masks, and other military supplies. Japan’s expansion in Asia cut the United States off from much of its natural rubber, so American scientists were forced to look for a replacement.

In 1943, General Electric engineer James Wright mixed boric acid with silicone oil and created a strange, elastic material. It bounced higher than rubber, but it wasn’t strong enough for the military’s needs. General Electric shared samples with scientists, hoping someone might find a practical use for it. Meanwhile, people began passing it around at parties for fun. At one of them, hosted by a General Electric executive, businessman Peter Hodgson watched guests play with it, recognized its potential as a toy, named it Silly Putty, and in 1950, he commercialized it.

7

Frozen Orange Juice Was Developed for American Troops

Orange juice provides vitamin C, which supports the immune system and helps the body heal wounds. During World War II, the military understandably needed to make sure troops received enough vitamin C. However, regular frozen juice lost its fresh taste during storage and transport, sometimes developing a flavor compared to turpentine. So in 1942, the Army asked researchers to create a frozen version that could travel without losing its flavor.

And by 1945, scientists of the Department of Agriculture removed water from fresh juice at low temperatures and then added a little fresh juice back into the concentrate. The process preserved the orange oils responsible for its familiar taste. The Army ordered 500,000 pounds, but the war ended before the product could be delivered. Instead, it reached American grocery stores in 1946 under the name Minute Maid and soon became a breakfast favorite.

8

Penicillin Became Widely Available Through U.S. Wartime Production

Penicillin offered a powerful solution to bacterial infections, which could otherwise turn a small wound deadly. But there was still one major problem: even a small amount took a lot of time and effort to produce. With thousands of wounded troops needing treatment during combat, the Allies had to find a way to produce much more of it.

British researchers brought their work to the United States, where government laboratories and drug companies took on the challenge. Scientists then found that growing the mold in deep tanks with a corn-based liquid produced much larger amounts . By 1944, American factories were making enough penicillin to treat Allied troops wounded during the D-Day invasion.

9

Aerosol Bug Spray Protected Soldiers From Insects

A mosquito bite wasn’t just annoying during war; it could literally take a soldier out of action. In tropical regions, mosquitoes carried malaria and other diseases that sickened lots of soldiers. An easy way to kill insects in tents and planes was needed, and large sprayers weren’t that practical.

Department of Agriculture researchers Lyle Goodhue and William Sullivan developed a small pressurized canister that released insecticide as a fine mist. Nicknamed the "bug bomb," it allowed troops to spray an entire space in seconds. It was patented in 1943, and more than 40 million cans were produced for military use during the war. It didn’t take long for that same technology to be used for home repellents.

10

Synthetic Rubber Kept American Vehicles Moving

A great number of wartime items needed natural rubber. — to make tires, hoses, engine belts, seals, life rafts, gas masks, and many other waterproof parts . But after Japan captured major rubber-producing areas in Southeast Asia, the U.S. lost access to most of its supply. Recycling and rationing efforts helped, but it wasn’t enough.

The government took action and brought oil, chemical, and tire companies together to build a synthetic-rubber industry at home. Made mostly from petroleum-based chemicals, the new material could do many of the same jobs as natural rubber. U.S. production grew from only 230 tons in 1941 to more than one million tons in 1945. Synthetic rubber kept military vehicles moving during the war and remained essential for tires and other everyday products afterward.

1

Measuring

This is a difference most Americans are aware of: most countries use the metric system rather than U.S. customary units, and most use Celsius instead of Fahrenheit. Countries such as the UK and Canada still use some imperial units in everyday life, but they mainly use the metric system. Another measure that confuses foreigners is the particular way ingredients are measured in American recipes, which often use cups, tablespoons, and teaspoons rather than measurements by weight.

Fun fact: The only other countries that use the Imperial system officially are Liberia and Myanmar.

2

Sales tax

Do you find having to calculate sales taxes annoying? That’s a unique American experience. In the majority of the world, the price you see is the price you pay , because it has the sales tax already added.

Why is it different in America? Sales taxes vary across states , so retailers find it easier to showcase the base price and then calculate the total at checkout.

3

Cutlery use

Many Americans abroad are surprised by the realization that not everyone uses a knife and fork in the same way they do . In fact, no one else does. While most Americans have learned the American style —also called the zig-zag or fork switching method— that involves using the fork in the left hand for cutting and then changing it to the right to pick up the food, European and Latin American countries don’t do this . It might seem like a small difference, but it completely changes the way you eat.

4

Iced drinks

Do other countries not have ice? They do, but they don’t necessarily assume everyone will want it. While serving water and other beverages with ice is customary in America, in many other countries, you need to request it —even during the hottest of summers.

But even if you get ice, many times you will need to specify the amount : the same drink that would be filled with ice cubes in America might come to you with just two or three cubes elsewhere.

5

Date formatting

The U.S. is not completely alone on this one, but there’s a difference big enough to be worth mentioning. The standardized way of recording the date in America is month-day-year , a convention also followed by some Caribbean and Asian countries. But in the rest of the Western world, the conventional format is day-month-year , which can lead to confusion for Americans. In most Asian countries , the most commonly used format is year-month-day .

6

The word ‘American’

In the English language, ‘American’ is the only way to refer to people with U.S. citizenship . Other words, such as ‘Usian’ or ‘Unitedstatian’ have been proposed, but never stuck. This is why many Americans are surprised when other countries —Latin American countries in particular— use ‘American’ for anyone in the American continent , or continents, another big difference. In most European and Latin American countries, there is a different word for U.S. citizens, such as the Spanish ‘estadounidense’ or the Portuguese ‘estadunidense’ .

7

Moving out at 18 years old

This one is not so black and white, but more like a general tendency. Compared with most of Europe, Latin America, and Asia, Americans give serious consideration to the possibility of moving out after high school. Not everyone does, and not everyone can afford it, but it's fairly common.

In other countries, young adults generally move out if their job or education requires it , but they tend to stay at home a few more years if they can.

8

Driving a car as a teenager

America is quite car-centric , especially if you live outside of the big cities. While not everyone can afford to have a personal car —even a second-hand one—, it is common for 16 and 17-year-olds to legally drive their parents’ car, or save for their own.

In the rest of the world, the chances of high schoolers driving themselves to school are much lower, as most countries don’t allow underage kids to get a driving license .

9

Solo cups

Do plastic cups exist outside of the U.S.? They do, but they are not as iconic or as widely used as Solo cups, introduced in the 1970s as a disposable but sturdy cup for parties and events. Many foreigners visiting America are surprised when they realize that solo cups are a real thing , and not something that just happens in movies.

10

Filing taxes

Taxes in the U.S. are not that different from taxes in other countries, except for how they are filed . During tax filing season, thousands of Americans direct their efforts to ensure they have properly reported their income and that their return will match the IRS’s data.

In other parts of the world, however, the one responsible for calculating and filing taxes is the government , while citizens merely corroborate that everything is in order.

1

The Cardiff Giant

In 1869, workers digging a well in Cardiff, New York, uncovered what appeared to be a 10-foot-tall petrified man. Locals rushed to see the "giant," paying admission to witness history in the soil.

But, as it turned out, it wasn’t ancient at all. A man named George Hull had buried the statue as a prank and made some quick money from the curious crowd.

2

War of the Worlds Broadcast

This very famous hoax took place on the eve of Halloween 1938. Orson Welles’s radio adaptation of The War of the Worlds aired as if it were breaking news . Many listeners tuning in late thought Martians had really landed in New Jersey.

Some packed up their cars or called the police in panic. Though no invasion occurred, the broadcast became a legend in media history.

3

The Balloon Boy

In 2009, Americans watched live TV coverage of a silver balloon drifting across the skies of Colorado , fearing that a six-year-old boy was trapped inside . The story gripped the nation for hours.

When the balloon finally landed empty, police discovered the child hiding safely at home. His parents later admitted it was a publicity stunt gone wrong.

4

The Feejee Mermaid

In 1842, showman P. T. Barnum unveiled a marvel: a preserved "mermaid" supposedly from the South Seas . Crowds lined up to see the half-fish, half-woman curiosity.

The truth was stranger still. It was the upper body of a monkey sewn onto a fish tail and covered in papier-mâché.

5

The Great Moon Hoax

Readers of The New York Sun in 1835 were astonished by reports claiming that scientists had spotted bat-like people and crystal palaces on the Moon through a powerful new telescope.

The story was pure invention, but circulation went up. By the time the truth came out, the paper’s readership had reportedly increased dramatically.

6

The Crop Circles Craze

When perfect circles began appearing overnight in wheat fields , people talked about UFO landings. The shapes seemed too precise to have been made by human hands.

But, in 1991, two Englishmen confessed they’d used boards and ropes to flatten the crops. While this revelation explained many of the formations, the mystery lives on in popular imagination.

7

Alien Autopsy Film

In 1995, a grainy black-and-white video surfaced, showing doctors dissecting what seemed to be an alien recovered from the 1947 Roswell crash. The footage spread quickly worldwide.

Years later, the filmmaker admitted that the film was staged, using latex models and fake organs.

8

The Manti Te’o girlfriend hoax

Notre Dame football star Manti Te’o captured hearts when he revealed that his girlfriend had died of leukemia . Sports fans wept over the tragic love story.

But reporters later learned that the woman never existed. It was an elaborate online catfishing scheme.

9

The Patterson–Gimlin Bigfoot film

In 1967, a short film shot in California showed a large, hairy creature striding through the woods . Many viewers thought this was real proof of Bigfoot´s existence.

Decades later, one participant claimed it was a man in a gorilla suit, but that claim failed to convince many people who prefer to believe in the existence of this creature.

10

The Drake’s Plate of Brass

In 1936, a shiny brass plate found in California seemed to confirm that explorer Sir Francis Drake had landed there in 1579. Historians called it a priceless relic.

For decades, the plate was displayed proudly, until metallurgical tests in 1977 proved it was modern . It had been made as a practical joke among historians that went too far.

11

Paul Is Dead

The final entry on our list might not be American per se, but it drew much attention on these shores. In 1969, rumors spread that Beatle Paul McCartney had died and been secretly replaced by a double . Fans scoured album covers for "clues" like hidden messages and backward songs.

Paul, very much alive, later joked about it. The bizarre theory became a lasting pop-culture phenomenon.