Have an apple

11 Medical myths we keep believing (but really shouldn't)

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Medicine is complicated, and it's easy for folklore, memes, and half-remembered advice to creep their way into our collective subconscious. Some of these myths are harmless, others are misleading, and many are downright dangerous. Let's take a look at 11 medical misconceptions that have endured over time, and that you've probably believed at one time or another.

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..keeps the doctor away, right? Apples are healthy. They are full of fiber, vitamins, and antioxidants. But, as you probably know, they aren't enough to ward off disease on their own. The phrase originated in 19th-century Wales as "Eat an apple on going to bed, and you’ll keep the doctor from earning his bread." The rhyme is charming, but fortunately, doctors still get plenty of bread.

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That satisfying pop comes from collapsing gas bubbles in the fluid of your joints, not from your bones grinding to dust. Decades of peer-reviewed research show no link between knuckle-cracking and arthritis or bone deterioration. It might be irritating for those around you, but not bad for your joints.

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It does feel that way, but it's only an optical illusion: the new growth feels blunt and coarse when compared to a tapered hair tip. However, the follicles themselves are unaffected by shaving. Your hair’s growth rate and thickness are determined by genetics.

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This one is nothing more than a parental scare-tactic propaganda. Gum is indeed indigestible, but it doesn’t remain trapped inside you forever. It passes through your digestive tract quite efficiently, just like corn or sunflower seeds. Certainly in days, not 7 years.

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Although carrots are good for overall eye health, the myth that they have the power to give you night vision stems from a little bit of British World War II propaganda. The British Royal Air Force claimed that their pilots had uncannily good night accuracy because of their carrot-heavy diets. In reality, it was a cover story to conceal their use of radar technology.

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Neither black coffee nor cold showers can accelerate the rate at which your body metabolizes alcohol. Ask any doctor for a recipe to sober up quickly, and they will tell you the sad, sad truth: it's impossible.

Plenty of people claim to have found a trick to solve this problem. However, no matter how many freezing showers you take, they will only make you cold, wet, and awake, but still drunk.

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Well, it depends on who you ask. There’s a long list of home remedies: hold your breath, drink water upside down, have a friend scare you, and so on. While some of these techniques might help by resetting your diaphragm, the truth is that most hiccups fade on their own within minutes. And if they don’t, you’re better off seeing a doctor than cycling through an endless number of folk cures.

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In reality, apple seeds contain amygdalin, which the body can convert into toxic cyanide (not arsenic). However, the amount of amygdalin in apple seeds is tiny: you would need to crush and eat over 150 apple seeds to get anything close to a dangerous dose. Or you could simply avoid eating the seeds altogether.

In any case, apples are far better at keeping the doctor away than they are at poisoning you.

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If you do, you'll catch a cold. Or that's what this myth would have us believe. In fact, wet hair in chilly weather will just make you uncomfortable.

As we know, colds are caused by viruses that get into our systems. Being cold or damp doesn't conjure viruses out of thin air. That being said, lowering your body's temperature might weaken your immune defenses slightly, but the real culprits are still unequivocally the germs.

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A Hollywood myth that has crawled deep into our collective imagination. While the exact origin of the phrase is unclear, it is often associated with the lectures of Harvard psychologist William James, who told audiences that we only tap a fraction of our full potential during the 1890s. The idea then evolved and spread through self-help and motivational literature, eventually becoming the widely believed claim we know today.

Scientific research has thoroughly debunked this notion. While the inner workings of much of our brain are still unknown to us, we do know that virtually all of it has a function, and we use 100% of it.

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A Thanksgiving classic, people like to blame their festive drowsiness on the turkey. There is some scientific basis for this: turkey does contain tryptophan, an amino acid that promotes sleep.

However, the amount in turkey is minimal and no greater than that found in chicken or beef. The real culprits behind your post-dinner nap are the carb overload, extra drinks, and day-long festivities—not the turkey itself.

We just know that we know nothing

12 facts that people often get wrong

No one can claim to know everything, but most people go through life confident about certain things. However, some of these widely held beliefs are not actually correct, despite their popularity. Let’s have a look at some "facts" you might have gotten wrong!

The idea that insects—particularly mosquitoes—are not animals is widespread, but it’s also incorrect. In fact, insects are the most diverse group within the Animal kingdom, with more than a million species described and representing more than half of the animal population of the planet.

The mistake comes from not considering that "fruit" is not only a culinary term but also a botanical one. Botanically, a fruit is the part of a plant that develops from a flower and contains seeds. This makes tomatoes, peppers, cucumbers, eggplants, and many other foods that we call vegetables actually fruits in the scientific sense.

Countries have a political delimitation, while continents are divided according to geographical criteria. The Russian Federation is the largest country on Earth, bordering fourteen other countries and extending across eleven time zones. It spans across a good part of Eastern Europe, but also across the Ural mountains—one of the recognized borders between Europe and Asia—and stretches deep into northern Asia.

While cold weather isn’t harmless, it is not the direct cause of illnesses like the flu, which are caused by viruses. In colder months, people tend to spend more time indoors and often avoid ventilating rooms, creating conditions that make it easier for viruses to spread and cause illness.

Bats might not prefer to be out during bright daylight, but this does not mean that they are blind. In fact, many species have excellent eyesight, though it is adapted to low-light or nighttime conditions. On top of that, bats also use echolocation, which allows them to navigate and hunt with remarkable precision in complete darkness.

The belief that you must wait a full day before reporting someone missing is a myth popularized by movies and TV shows. In reality, the law does not require a waiting period. In fact, law enforcement agencies stress that the first 24 hours are often the most critical, so a missing person should be reported immediately.

Some man-made structures are visible from space without magnification, but despite popular belief, the Great Wall of China is not one of them. While it is quite long, being over 13,000 miles long, it is relatively narrow, and its earthy colors blend in with the surrounding landscape, making it nearly impossible to spot with the naked eye from orbit.

This one is tricky: Mount Everest is the highest mountain on Earth (29,032 feet)… if you measure the distance from sea level to peak. For the actual tallest mountain, the answer might vary depending on how you measure. Measured from base to summit, Mauna Kea in Hawaii is the tallest at 33,474 feet—though much of it is underwater. Mount McKinley (Denali) in Alaska rises about 18,000 feet from its base to the peak, making it the tallest mountain entirely above sea level. And Ecuador’s Mount Chimborazo, while shorter in height, is the farthest point on Earth from the planet’s center due to the equatorial bulge.

The Earth is tilted on an axis, which causes the amount of sunlight each hemisphere receives to change as it orbits the Sun. Because of this tilt, when the Northern Hemisphere is tilted toward the Sun and experiences summer, the Southern Hemisphere is tilted away and experiences winter—and vice versa. This is why the Southern Hemisphere celebrates Christmas during summer.

Standard medical advice is to gently guide a sleepwalker back to bed rather than waking them, but not because waking them is inherently dangerous. People tend to sleepwalk during deep sleep, so waking them up might startle them or cause confusion and disorientation.

Hair color and thickness are determined by genetics, not by shaving. Hair naturally gets thin at the ends, so when you shave it, the hair shaft appears to be thicker and darker because of the blunt cut. But it's just an optical illusion; the natural size of the shaft remains unchanged.

Coffee is a natural diuretic, meaning it can increase trips to the bathroom. However, the water in brewed coffee still contributes to your hydration and offsets its mild diuretic effect. If you consume coffee in moderation—3 to 5 cups a day, depending on your tolerance—you should be alright. However, drinking extra water on the side is never a bad idea.