Superstitions that still make us knock on wood

Ten common superstitions and their surprising origins

We're rational adults living in the 21st century. We have smartphones, streaming services, and GPS navigation. Yet somehow, when a black cat crosses our path, we still feel that little twinge of "uh oh." Let's explore ten classic superstitions that continue to haunt (and amuse) us today.

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Drop a mirror and watch it shatter? Congratulations, you've just signed yourself up for seven years of misfortune—or so the superstition claims. This belief dates back to ancient times when mirrors were rare, expensive, and thought to reflect your soul. Breaking one meant damaging your very essence, which would take seven years to "regenerate." That's quite the warranty period for your spiritual well-being.

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See a ladder propped against a building? Better walk around it unless you want bad luck following you home. This superstition actually has some practical roots—walking under a ladder is genuinely dangerous since paint cans, tools, or clumsy workers could fall on your head. But the mystical explanation is even more interesting: a ladder against a wall forms a triangle, which represents the Holy Trinity, and walking through it was considered a sign of disrespect to the divine.

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In medieval Europe, these sleek felines were associated with witches and dark magic, making them the least popular pet choice for the superstitious. Cross paths with one, and you were supposedly inviting misfortune into your life. Never mind that black cats are just regular cats with darker fur—superstition doesn’t care about logic.

Ironically, in some cultures, black cats are considered good luck, which must be very confusing for the cats themselves. Are they harbingers of doom or furry little fortune cookies? It all depends on which side of the ocean you're standing on.

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Popping open an umbrella inside the house is a big no-no in the superstition handbook. The origins of this belief are a bit murky, but one theory suggests it offended the sun god to use a shade-providing device indoors, where the sun doesn't shine anyway. Another explanation is more practical: early umbrellas had stiff springs and metal spokes that could genuinely hurt someone or knock over valuables when opened in tight spaces.

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Say something good about yourself—"I haven't been sick all year"—and watch yourself immediately reach for the nearest wooden surface. The ritual supposedly prevents your boastful words from jinxing you and attracting bad luck's attention. Its origins trace back to ancient tree-worshipping cultures that believed spirits lived in wood and could offer protection if properly acknowledged.

The best part about this superstition is how flexible it is. Can't find real wood? Knock on your head (insert your own joke here). Some people tap twice, others three times—there's no official protocol, which is refreshing in the otherwise rigid world of superstitions.

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This superstition combines two separate fears: Friday was considered unlucky because it was the day of Jesus’s crucifixion, and the number 13 has been deemed unlucky for various reasons, including being one more than the "perfect" dozen. Put them together, and you’ve got a day so notorious it inspired an entire horror movie franchise.

The funny thing is, there’s no statistical evidence that more bad things happen on Friday the 13th than on any other day. Yet hotels often skip the 13th floor (jumping from 12 to 14), and some airlines avoid having a 13th row.

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Knock over the salt shaker at dinner, and tradition demands that you immediately toss a pinch over your left shoulder. Why? Because the devil was supposedly lurking behind your left shoulder, waiting to cause mischief, and throwing salt in his eyes would temporarily blind him. Salt was once incredibly valuable—Roman soldiers were even paid in salt, giving us the word "salary"—so spilling it was genuinely wasteful and considered an invitation for bad luck.

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"Find a penny, pick it up, and all day long you'll have good luck"—but only if it's heads up. If it's tails up, some versions say you should flip it over for the next person or leave it alone entirely. This is one of the more optimistic superstitions, suggesting the universe occasionally scatters small fortunes in our path. Given that a penny is worth one cent, the universe isn't exactly being generous, but it's the thought that counts.

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When someone sneezes, we automatically say "bless you" or "gesundheit" without really thinking about why. The tradition supposedly started because people believed your soul could escape through your nose during a sneeze, or that the sneeze temporarily stopped your heart, leaving you vulnerable to evil spirits. By blessing the person who sneezed, you were offering spiritual protection during this brief moment of weakness. It's surprisingly dramatic for such a common bodily function.

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Ever notice how someone playing poker, bowling, or trying any new activity for the first time often experiences unexplainable success? That's beginner's luck, the superstition that newcomers are temporarily blessed with good fortune, perhaps because fate wants to encourage them to keep trying. It's a convenient explanation for why your friend, who's never bowled before, just rolled a strike while you, the experienced bowler, keep hitting the gutter.

Of course, there are practical explanations: beginners aren't overthinking their moves, aren't burdened by bad habits, and aren't feeling pressure to perform. But where's the fun in that? It's much more entertaining to blame supernatural forces for our defeats.

What science says

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

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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.

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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!