From fact to fiction

Don't do this! 10 popular myths busted by science

Image: Hartono Creative Studio

Some claim that humans only use 10% of our brains, others say that eating turkey makes you sleepy, and everyone has heard the supposed remedy for a jellyfish sting. Like these, there are many well-known myths we frequently repeat without giving them much thought. Fortunately, science has taken the time to put these ideas to the test to see if they are true: it turned out that they were not! Join us to discover these 10 popular myths that science has debunked.

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For centuries, both children's tales and cartoons have depicted the idea that cheese and mice are inseparable. However, science has revealed that mice don’t have a particular preference for cheese over other types of food. Although this is a common stereotype, mice are more drawn to foods high in sugar, such as candy or fruit.

Now you know—next time you’re setting a mouse trap, you might want to bait it with a Snickers bar instead of a piece of cheese.

Image: Claudio Schwarz

There is a famous myth going around that claims eating turkey can make you sleepy. However, this is not exactly the case. The myth arises because turkey contains tryptophan, an amino acid that helps the body produce serotonin and melatonin, essential for promoting sleep. However, the amount of tryptophan in turkey is not enough to make you drowsy. So, you can enjoy your turkey dinner without worrying about nodding off at the table!

Image: Bernd Dittrich

For years, it was widely believed that the Great Wall of China was the only human-made structure that could be seen from outer space with the naked eye. However, while we would all like it to be true, this claim is actually a myth.

It's a fact that the Great Wall is indeed very long, but it's also relatively narrow. That means that as we gain altitude, the Great Wall blends in with the surrounding natural landscape.

Image: Felix Mittermeier

A common myth claims that lightning never strikes the same place twice. This may be reassuring to many, but science—and nature itself—have proven otherwise. In fact, lightning can strike the same location multiple times, particularly if it’s a tall structure or an area containing water or metal.

The safest and most recommended thing to do during a lightning storm is to stay indoors.

Image: sanjiv nayak

Goldfish are said to have a memory span of only a few seconds. This myth probably originated due to the repetitive behaviors observed in these fish. However, science has debunked this notion.

Through various experiments and research, it has been demonstrated that goldfish can remember multiple things for several weeks. For example, they can recognize the faces of their keepers, remember feeding schedules, and even associate certain stimuli with rewards.

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You're chilling, enjoying some chips, when suddenly—oops! One hits the floor. What do you do in that case? Do you follow the so-called "five-second rule"? According to this myth, if you drop food on the floor, it's safe to eat it if you pick it up within 5 seconds.

While we would like it to be right, science discourages this idea. The truth is, as soon as food hits the floor, any bacteria present can transfer to it instantly.

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A classic cartoon scene: the frightened ostrich burying its head in the ground. You've probably seen it, too, right? Although this is a common belief, ostriches never actually bury their heads.

This myth likely stems from the way ostriches care for their nests. These birds make a small hole in the ground and place their nests there to keep them safe. From a distance, when we see the ostrich sticking its head in the ground, it is actually taking care of its chicks!

Image: Giovanni Calia

This is one of the most widespread myths in the world, originating from bullfighting traditions. The myth claims that the color red makes bulls extremely angry, driving them into a mad rage. However, this isn’t true.

In reality, bulls can’t even perceive red—or many other colors—the same way humans do. Experts believe bulls react to the movement of the bullfighter’s cape, not its color.

Image: Jeffrey Hamilton

What should you do if you get stung by a jellyfish? Many of us instantly think of the myth that urinating on the sting will relieve the pain. Unfortunately, not only is this a myth, but it can actually make things worse!

If you're unlucky enough to be stung by a jellyfish, the best course of action is to rinse the affected area with vinegar to neutralize the venom. Be sure to avoid touching the sting with your bare hands to prevent further irritation or spreading the venom.

Image: Chewy

As kids, many of us grew up hearing that dogs only see in black and white. Luckily for our pets, that's just a myth!

Dogs perceive colors in a way that's different from ours. While the human eye has three types of color receptors, dogs have only two. In other words, while we can see a broad spectrum of colors, dogs see a more limited range, similar to someone with red-green color blindness.

Stories of lucky accidents

Sometimes it pays to be sloppy: Products that were born from mishaps

Image: Jarritos Mexican Soda

Inventions are often conceived through order and precision. But sometimes they’re not. As history shows, on occasion it’s the chaotic, messy moments that lead to the greatest discoveries. From accidentally boiling tea leaves in their containing silk bag to forgetting a soda outside on a freezing night, these everyday objects owe their existence to observant and creative minds who found silver linings in mishaps. Let’s look into the creation of 10 well-known products that were born on days when things went wrong.

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People weren’t supposed to dip the small bundles of tea leaves in hot water. At least, that was not what American trader Thomas Sullivan intended in 1904 when he shipped samples of his tea to Europe in small silk bags to keep the leaves neatly separated. He hoped buyers would open the bags and pour hot water over the leaves using strainers, as was customary back then. However, many customers found that the silk bags were very practical for making tea easily.

This observation led to the development of small bags for marketing tea. Gradually, the industry evolved from silk bags to more sustainable and cheaper options. It was 30 years later that parchment paper dual-chamber bags were invented, leading to the teabags we know today.

Image: Tristan Gassert

Though wine had been produced in the northern French region of Champagne since Roman times, the Champenois had a long-lasting problem: refermentation. In winter, cold temperatures would halt the fermentation process. Dormant yeast cells would reactivate with the warmth of spring, releasing carbon dioxide gas. This pressure sometimes incorporated bubbles into the drink, and at worst, caused the bottles to explode in the cellars.

Dom Pierre Perignon, a monk in the 17th century, was tasked with finding a solution to refermentation. He experimented with grape varieties and processes for making wine, which led to the erroneous myth that he invented Champagne. While he was indeed the creator of winemaking practices that are relevant today, Champagne, as we know it today, was simply the evolution of that fizzy wine, which Champenois decided, in the end, wasn’t such a bad idea.

Image: Eva Bronzini

16th-century Dutch traders are credited with the invention of Brandy. Its name derives from the Dutch term for "burnt wine": brandewijn. That alone hints at an interesting story.

When wine needed to be stored to travel on long sea journeys, Dutch traders developed a heating distilling system to preserve it. The idea was to make a very concentrated version that could be rehydrated with water upon arrival. However, eventually, they noticed that this "burnt" version, when stored in wooden casks, developed a unique flavor and aroma that people enjoyed. This discovery led to different regions developing their own variations, giving rise to alternatives such as cognac and Armagnac.

Image: Taylor Heery

The creator of Popsicles was an 11-year-old, according to the company. One day in 1905, he forgot a cup of soda with a stirring stick outside on a cold night. By the next morning, he realized that the drink had frozen, but the stick made it easy to handle. Curious, he gave the frozen soda a try and liked it.

His name was Frank Epperson, and he initially called his invention as "Epsicles" and sold them locally. It wasn’t until he was an adult that he decided to patent the invention and commercialize it on a larger scale. Eventually, Epsicles were sold worldwide. The story goes that, because Frank’s children referred to them as "Pop’s sicles," the product was eventually rebranded as "Popsicles."

Image: Mathilde Langevin

According to the story, Constantin Fahlberg was enjoying his dinner after a long day working in the lab when he noticed that his bread tasted unusually sweet. He traced this quality back to a compound he had been studying earlier. He was a chemist analyzing coal tar at Johns Hopkins University, and that day in 1879 he had been handling a derivative called benzoic sulfimide.

After this discovery, aided by his mentor Ira Remsen, Fahlberg developed a synthesis of the substance he named "saccharin" (inspired by the Latin word for sugar, saccharon). The artificial sweetener soon became commercially available and was widely used during sugar shortages that occurred in World War I.

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Nowadays, smoke detectors come in very compact plastic enclosures, making them easy to install in many homes. But they weren’t always the ceiling disks that we know today.

In the late 1930s, Swiss physicist Walter Jaeger was working on a device that would alert

people of poisonous gas leaks. Legend has it that, while taking a frustration break near one of his failed inventions, he lit a cigarette, and the machine detected it. The device was triggered and Jaeger realized that it could alert people of the presence of smoke. The first versions of the device were only available for industrial use until ​​American businessman Duane Pearsall developed a battery-powered detector in 1965, practical for home use.

Image: Ian Talmacs

In 1826, John Walker, an English chemist, accidentally invented matches while trying to create a new lighting method. He was mixing chemicals with a stick, and when he scraped the stick on the floor to clean it, the chemicals ignited, sparking the idea of lighting chemicals by friction.

He presented this concept in London and inventor Samuel Jones adopted it into the first version of friction matches. These early matches were unpredictable, often igniting with sparks and producing strong fumes. For this reason, as well as for marketing purposes, these early prototypes were known as "Lucifers" for many years.

Image: Ksenia Chernaya

In 1942, Harry Coover was an inventor at Eastman Kodak Company, where the team was trying to develop clear plastic guns to supply to Allied soldiers during World War II. They were testing the material cyanoacrylate, a compound that turned out to be incredibly durable but extremely sticky, so it was discarded.

A decade later, while reviewing his notes, Coover remembered cyanoacrylate and returned to its investigation. He quickly realized that it was a powerful substance for holding things together, without the need for pressure or heat. In the 1950s, the Eastman team marketed this product as "Eastman 910," which was later renamed "Super Glue."

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This is another example of life-changing technology born thanks to a machine not doing what it was supposed to. In 1958, engineer Dr. Wilson Greatbatch was trying to design equipment that would record the rhythm of the heart. He installed an incorrect resistor in the circuit and observed that the system produced intermittent pulses.

This discovery led to the design of a small device that could aid the beating of a human heart, though it took time to develop one that could be implanted. By 1958, Greatbatch and his collaborators had created a prototype that was tested on patients. The doctor spent the following decades iterating and perfecting his invention.

Image: Owen Beard

We conclude with one of the most famous examples: German physics professor Wilhelm Röntgen stumbled on what he called "X-rays" by accident. Imagine experimenting with cathode rays in 1895 and suddenly noticing that a strange glow can pass through several opaque objects in your office.

In preliminary articles, Röntgen referred to this radiation as "X" to signify that its type was unknown. The label stuck even as these rays were further experimented with. Its medical relevance soon became obvious, and the first photographic plate made with X-rays was of his wife’s hand. Records say that upon seeing the image of her bones, she remarked, "I have seen my death."