From fact to fiction

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

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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.

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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!

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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.

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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.

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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.

What science says

It was false after all: 10 health myths that sound true—but aren't

Image: Alicja Gancarz

Health myths are everywhere! These ideas were simply passed down for so long that they became part of what we believed. But now science has stepped in to clear things up. Does cold weather make you sick? Can lemon detox your body? Is reading in low light really harmful? Let's uncover the truth behind 10 common health myths!

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Have you ever been told that cutting your hair will make it grow faster? We're sorry to say that's just a myth. Hair grows from the root, not the ends. So, trimming it won't boost growth, though it does help remove split ends that can make your hair look dry or unhealthy.

Image: Thom Holmes

This is one of the most common health myths. Cold weather often gets blamed, but it's not the temperature that makes you catch a cold. During winter, we tend to stay indoors with others and keep the windows closed, an environment that makes it easier for viruses to spread. That's why colds tend to be more common in winter!

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The idea that eating before bed automatically leads to weight gain is a myth. In reality, it has more to do with what you eat and how much, rather than the time of day. Often, when we eat very late at night, we're tired and more likely to reach for quick, high-calorie, heavy foods. This can disrupt sleep and lead to consuming more calories than we burn, both of which may affect weight. If it's close to bedtime, it's better to have something light and healthy in a moderate portion than to skip a meal altogether.

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Does wearing glasses weaken your vision? Myth! If an eye doctor prescribes glasses, wearing them as directed helps correct your vision; it won't make it worse. Additionally, the right glasses can help prevent or reduce headaches caused by reading or spending long hours in front of a screen.

Image: Amir Balam

This myth is closely related to the previous one. If you love reading and sometimes have to do it in low light because of the situation, don't worry. According to experts, reading in low light doesn't cause permanent or irreversible eye damage. However, it's not recommended because it can make your eyes feel tired or strained, leading to discomfort or headaches.

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We're all different, and so are our bodies. The idea that everyone should drink exactly eight glasses of water a day is more of a general guideline than a rule. Staying well hydrated throughout the day is extremely important, but how much water you need depends on factors like your weight, age, climate, and overall health. We should prioritize staying consistently hydrated instead of obsessing over the number of glasses we drink.

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Some people say drinking lemon water helps eliminate toxins and cleanse the body. While adding a slice of lemon to your water is a refreshing way to stay hydrated, it doesn't have any special "detoxifying" powers. The vitamin C in citrus fruits is beneficial, but the body has its own natural detox system. The liver and kidneys are the main organs that filter waste and eliminate toxins.

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Not all fats are bad! Just like other food groups, your body needs fats to function properly. The important thing is knowing the difference between healthy fats and those that can be harmful. Foods like avocados, seeds, olive oil, fish, and nuts are rich in healthy fats. On the other hand, the fats found in processed or fried foods are the ones that can have a negative impact on your body.

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Liver diseases can be serious. While heavy and frequent consumption of alcohol and fats is a major contributor, it's not the only cause. Liver problems can also result from many other factors. These include viral infections, autoimmune diseases, genetic disorders, high blood pressure, and exposure to certain chemicals.

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There's some truth to it: breakfast is important because it replenishes our glucose and energy levels and supports proper metabolism. However, the idea that it's the most important meal of the day might be an exaggeration. Everyone's body has different needs, and all meals are important, so we shouldn't skip any of them!