Knock on wood

Are you tempting fate? These 10 things are said to bring bad luck!

We don't want to alarm you, but there are a huge number of habits, actions, words, objects, and even calendar dates that, according to various traditions, can bring bad luck. You probably already know it's best to be extra cautious with mirrors and avoid walking under a ladder, but other "unlucky" items and actions might surprise you. In fact, chances are you're doing some of them without knowing it! If you want to avoid misfortune, check out these 10 things commonly thought to cause bad luck. Keep your fingers crossed!

Image: Austin Neill

The world of sailing is steeped in customs, beliefs, and superstitions. It's understandable; the sea can be unpredictable, so seeking ways to attract or preserve good fortune makes sense.

One long-standing superstition, which has been around for centuries, claims that changing the name of a boat brings extreme bad luck. According to this tradition, replacing the name is believed to anger the spirits that protect the boat, bringing tragedy to whoever dares to do it.

Image: Erik Mclean

While it's always nice to give and receive gifts, there are some restrictions when it comes to luck.

According to many traditions, giving knives as gifts is a bad idea: the object is said to "cut" the bond between the giver and the receiver, distancing them emotionally. However, another custom has emerged as a solution to this belief! If a friend gives you a nice cooking knife, you can simply give them a penny or some other coin in return. The small amount of money turns the gift into a "transaction," effectively warding off bad fortune.

Image: Volha Flaxeco

Many people set a specific day each week to change the sheets. Some prefer to do it on Mondays, to start the week fresh, while others prefer to leave that task for the weekend. Sadly, we have to announce bad news for those in the latter group.

Some cultures around the world consider it bad luck to flip your mattress or change your sheets on weekends, especially on Sundays. This superstition is linked to the meaning of Sunday in many religions, where it's seen as a day of rest and reflection.

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No one can deny the mesmerizing beauty of a rainbow. Something about this phenomenon amazes us and makes us all want to look at it, admire it, and take pictures of it.

But some traditions warn us that pointing at a rainbow can cause bad luck. In fact, according to some beliefs, misfortune could particularly affect the pointing finger, causing it to rot, swell, bend, or even become paralyzed!

Image: Diana Polekhina

Bad luck doesn't always appear unexpectedly; it sometimes warns you beforehand. But how?

According to this belief, a bad omen can manifest through your body, particularly your nose. While sneezing is a common and everyday act, it is believed to be a sign of misfortune if it happens on the first day of the month or right before starting an important task or process. But don't worry! There's also a solution. Believers claim that you can protect yourself with the famous "bless you."

Image: Lidya Nada

We love birthdays! Celebrating another year with the people you love is undoubtedly one of the most beautiful moments. But even in these instants of joy, you have to watch your luck.

Superstition recommends that you should be patient and wait until after midnight to wish a loved one a happy birthday. According to this belief, wishing someone a happy birthday too early can tempt fate. Just in case, let's not take any chances!

Image: Andrew Neel

What do you do with your bag or backpack as soon as you enter a place? While most of us hang it up, some might simply place it on the floor. If you're superstitious, it's best to avoid the latter!

It's believed that leaving your backpack, purse, or wallet on the floor invites financial misfortune. Specifically, it's said that this gesture drives away money and abundance, and who would want that, right?

Image: Radek Skrzypczak

Unlike your bag, your shoes should always stay on the floor. Or, at least, tucked away in a closet or shoe cabinet. But why?

Shoes are constantly in contact with the ground and the dirt on it. For that reason, it's said that putting shoes on a clean surface—such as a table or countertop—can bring bad luck to the owner of the shoes.

Image: Francesca Tosolini

Often, when we're in a good mood, we go around the house singing, dancing, or whistling. No one can deny that it's great fun, right? However, one of these actions comes with a superstition.

According to many cultures, whistling indoors can have serious consequences. It’s said to attract evil spirits and negative energies into the house. Do you believe it? Just in case, we'll be saving the whistling for open spaces!

Image: Mike Dorner

There is a widespread belief among sailors and those who frequent the sea, though it's little known to the general public.

Many ingredients and foods are brought onto boats. However, one fruit is specifically avoided: bananas. It's considered bad luck to bring bananas on board a ship. According to some historians, this belief may have originated because bananas are among the first fruits to spoil, attracting insects and pests.

A mouthful of facts

What does the tongue say about you? 12 clues hidden in our mouth!

Image: Clem Onojeghuo

Our mouths do so much more than help us chat, chew, and chuckle. This hardworking part of the body is home to a whole host of weird, wonderful, and sometimes wacky facts. From surprising saliva stats to your teeth’s secret life, a lot is going on behind your smile. And the best part? You don’t need a medical degree to appreciate these bite-sized bits of trivia. Let’s sink our teeth into some fascinating mouth facts!

Image: Nick Fewings

Taste buds are important, but without saliva, your taste buds wouldn't be able to detect much of anything. Saliva helps break down food particles and dissolve the chemicals that make up flavors, sending them to your taste receptors. That’s why food tastes bland when you're dehydrated. Hydration equals better flavor!

Image: Joey Nicotra

Believe it or not, the inside of your mouth is teeming with life. Wanna hear the numbers? Around 8 billion bacteria live there! That’s roughly the population of the entire planet, all crammed into your smile.

Most of these microbes are harmless, and some are even helpful. But when they get out of balance, that’s when things like cavities and gum disease can set in. Brushing and flossing aren’t just cosmetic, they help keep the peace in this microscopic community.

Image: Diana Polekhina

This might surprise you, but skipping floss can affect more than just your gums. Studies have shown a strong link between poor oral health and major diseases like heart disease, diabetes, and even osteoporosis.

Inflammation from gum disease may contribute to problems in other parts of your body. Your mouth is like a window into your overall health, and red flags here could signal trouble elsewhere. Keep the dental checkups going! Your whole body benefits when your mouth is in top shape.

Image: Brian Matangelo

Taking a dip in the pool is refreshing, but make sure you keep your mouth closed. Chlorine, used to disinfect pool water, can be tough on your teeth.

Frequent exposure may weaken enamel and lead to increased tooth sensitivity. That means swimmers, especially those doing laps daily, should be extra cautious. If you’re one of them, just know rinsing with clean water after a swim can help wash away any residue.

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Plaque isn’t just a little fuzzy feeling on your teeth, it’s a mix of bacteria, food particles, and saliva. If left alone, it hardens into tartar, which only a dentist can remove.

Plaque is the main cause of gum disease and cavities. Brushing twice a day and flossing help kick it to the curb. Mouthwash can give an extra layer of protection, too.

Image: Fernanda Greppe

Of all the muscles in your body, the tongue is the only one that doesn’t need skeletal support to do its job. It’s a muscular marvel that helps with speaking, swallowing, and tasting. Despite its flexibility, it’s incredibly strong for its size.

Plus, no two tongues are the same; each has a unique print, just like fingerprints. Bet you didn’t know your tongue was such a multitasker!

Image: Kamal Hoseinianzade

You might only see the top two-thirds of your teeth, but the rest is hiding below the gumline. That hidden portion includes the roots, which anchor your teeth in place. Healthy gums are essential for keeping this foundation strong.

Gum disease can cause that support to weaken, leading to tooth loss over time. So yes, we said it one too many times, but flossing is about way more than fresh breath. A deep clean leads to a deep-rooted smile.

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Green tea is full of powerful antioxidants and natural antibacterial agents. These can help reduce inflammation in your gums and keep harmful bacteria at bay. Studies suggest it may even lower your risk of periodontal disease.

Unlike sugary drinks, it doesn’t feed the bacteria that cause decay. And it’s a pretty soothing way to wind down after a meal. Swap one of your daily cups of joe for green tea, and your mouth will thank you.

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You’ve got about 10,000 taste buds scattered around your mouth, but most live on your tongue. They detect sweet, salty, sour, bitter, and umami flavors, working together like a culinary orchestra.

Now, here’s the fascinating fact: Taste buds regenerate every 10 to 14 days, so you’re always getting a fresh batch. However, aging, smoking, and illness can dull your sense of taste over time.

Image: Lesly Juarez

Just like fingerprints, no two people have the exact same set of teeth. Their size, shape, alignment, and even bite pattern are all uniquely yours. That’s why dental records are so helpful in forensics.

Your teeth are part of your identity, and once you lose them, they don’t grow back. Protecting them is a lifelong investment!

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Get ready for this one: The average person produces over 37,000 liters of saliva in a lifetime. That’s enough to fill two entire swimming pools!

Saliva plays a vital role in digestion, taste, and keeping your mouth clean. It helps neutralize acids and wash away food particles, protecting against decay. Without it, your mouth would be a desert. Yes, this fact was kind of gross, but equally helpful!

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Over the course of a lifetime, the average person spends 38.5 days brushing their teeth. That’s more than a month with nothing but you, your toothbrush, and the mirror.

It may sound like a lot, but your smile’s worth every second, don’t you think? Regular brushing keeps plaque away, prevents bad breath, and saves you from future dental bills. Just keep brushing, you’re doing mouth maintenance like a pro!