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.

Ten bizarre inventions from the past that never caught on

Ten crazy inventions history forgot (luckily)

Ever wonder what happened to all those "revolutionary" gadgets that promised to change our lives? Some ideas were just too weird, too early, or too wonderfully impractical to survive. Let's take a nostalgic trip through the patent office's hall of shame.

Back when fresh air was considered a cure-all, London parents who lived in apartments faced a dilemma: how to give their babies outdoor time without a yard? The solution was a wire cage that hung outside the window, suspending Junior several stories above the street. Parents would just pop the baby in the cage and go about their day.

Shockingly, this didn't catch on. Perhaps it was the image of infants dangling precariously over busy sidewalks.

Imagine a giant goldfish bowl on your head, lined with cork, with only a thin slit to see through. That was the Isolator, designed to help people concentrate by blocking out all distractions. The inventor, Hugo Gernsback, thought sensory deprivation was the key to productivity. An attached oxygen tank let you breathe while you worked.

The problem? Looking like a deep-sea diver at your desk isn't exactly conducive to office camaraderie. Plus, trying to type while essentially wearing a fish tank proved impractical.

This battery-powered cone featured a small motor that rotated the ice cream for you, so you could just stick out your tongue and let technology do the rest. It was supposed to prevent drips and ensure even licking coverage.

The invention raised an important question: had we become so lazy that rotating our wrist was now an insurmountable challenge? Apparently, the answer was no. The motorized cone disappeared faster than ice cream on a summer day.

This amphibious bicycle promised to let you pedal across lakes and rivers just as easily as riding down Main Street. It featured a boat-like hull and paddle wheels instead of regular tires. The inventor envisioned commuters cycling across waterways, avoiding bridge traffic entirely.

Unfortunately, the Cyclomer was heavy, slow on both land and water, and required the leg strength of an Olympic athlete to move at anything faster than a crawl.

Dr. John Brinkley convinced thousands of men that transplanting goat testicles into humans would restore youth and vigor. For the bargain price of $750 (about $12,000 today), you could have surgery in his Kansas clinic and supposedly regain the vitality of your younger days.

Unsurprisingly, the procedure didn't work—goat glands don't function in human bodies. Brinkley eventually lost his medical license, but not before making millions.

When cars first became common, someone invented a net-like contraption that attached to the front bumper to scoop up pedestrians before running them over. The idea was that the person would land safely in the net instead of under the wheels. It looked like an industrial-sized butterfly net.

The fatal flaw? Getting hit by a car and caught in a net is still getting hit by a car. Plus, the contraption made vehicles longer and harder to maneuver, probably causing more accidents than it prevented.

Picture this: you're stuck in bed recovering from illness, and what you really need is a full-size piano suspended over your body. That's what one inventor thought, anyway. The piano hung horizontally above the patient, who could supposedly play while lying flat on their back.

Beyond the obvious safety concerns of dangling a heavy musical instrument over sick people, there was the question of who actually wants to play piano while confined to bed.

In an era when dimples were considered irresistibly charming, someone invented a face-shaping device that promised to create them artificially. The contraption used springs and knobs to press into your cheeks for 15 minutes daily until dimples supposedly formed permanently.

It didn't work, of course—dimples are genetic, caused by variations in facial muscle structure. But that didn't stop people from trying.

L. Ron Hubbard claimed this modified lie detector could measure the electrical characteristics of your thoughts and help achieve spiritual enlightenment. Users held two tin cans connected to a meter while being asked questions. A needle supposedly revealed deep psychological truths.

Scientifically, it was just a simple ohmmeter measuring skin resistance—the same principle behind mood rings. But it cost considerably more and came with significantly more baggage.

Why carry a portable radio when you could wear one on your head? This invention looked like a regular pint-sized baseball cap but contained a tiny AM radio with an antenna poking out the top. Earphones ran down to your ears, letting you listen to broadcasts while keeping your hands free.

The problem was that you looked absolutely ridiculous, like an alien trying to blend in at a baseball game. The reception was terrible, the batteries died quickly, and the whole contraption was uncomfortable.