Think again

You’ve been wrong all along—10 facts that prove how little we really know

Image: Elimende Inagella

You repeat them every day—often without thinking twice. But a surprising number of "facts" we take for granted are just plain wrong. Whether it’s the recommended water intake or the behavior of lightning, prepare for a reality check. These 10 everyday misconceptions will make you rethink everything you thought you knew.

Image: Ladislav Stercell

You lose heat through any part of your body that’s exposed—not just your head. This myth likely started from an outdated military study in which soldiers in Arctic conditions wore full-body gear but no hats, for some reason.

Heat loss is driven by surface area and exposure. If you're unlucky enough to be naked in freezing weather, you'll lose heat evenly across your body—not primarily from your scalp.

Image: Leo Rivas

Pure water is actually a very poor conductor of electricity. It’s the impurities in water—like dissolved minerals and salts—that allow it to carry an electric current.

However, since the water we commonly encounter is rarely pure, it readily conducts electricity—making contact between water and electrical sources hazardous.

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Also, nope—it only looks that way. Shaved hair has a blunt edge, which can make it feel coarser or appear darker than unshaved hair.

Hair growth is determined by follicles beneath the skin. Since shaving only trims hair above the surface, it has no effect on thickness, color, or growth rate.

Image: Ahmed Zayan

Goldfish can actually remember things for weeks, even months. They’re far smarter than we usually give them credit for.

Moreover, studies have shown goldfish can be trained to respond to feeding times and light cues. So don’t keep yours in a tiny bowl—it’s far too small for their cognitive and physical needs.

Image: NOAA

It absolutely does—and often. The Empire State Building gets hit about 25 times a year. This is because lightning follows the path of least resistance, which often means tall, conductive structures get hit repeatedly.

So, if you’re caught in an electrical storm, don’t run toward the last spot that was struck—chances are, lightning will hit there again!

Image: C. G.

Glass is an amorphous solid—not a liquid—and despite popular belief, its molecules don’t flow over time.

The myth likely originated from old window panes, which are sometimes thicker at the bottom. This thickness is due to historical manufacturing techniques—not because gravity caused the glass to flow downward.

Image: Joseph Greve

Hydration needs vary depending on age, activity level, climate, and diet—and they don’t require exactly eight glasses. Food and other beverages also count toward your fluid intake.

In reality, the "8 glasses a day" rule isn’t based on hard science; it’s simply a general guideline to prevent dehydration. Under normal conditions, drinking when you’re thirsty is usually enough to stay well hydrated.

Image: Олег Мороз

Blood is always red—it only appears blue through the skin because of how light interacts with tissue and veins.

The only real color difference is that oxygen-rich blood is bright red, while deoxygenated blood is a darker red. Humans and other vertebrates do not have truly blue blood.

Image: Quinten de Graaf

While it’s true that swallowed gum can’t be digested, it doesn’t stay in your stomach—it passes through the digestive system normally.

The same happens with things like corn kernels or hard seeds. Only when large amounts of gum are swallowed—often along with other indigestible objects—can it lead to blockages or health issues.

Image: Romain GROSSIER

While a sleepwalker may be confused or startled if awakened, it’s not inherently dangerous and can sometimes be the safest way to prevent accidental injury.

Experts often recommend gently guiding sleepwalkers back to bed, but waking them is also acceptable if there’s an immediate risk of harm.

Deathbed statements

Beyond the grave: Take a look at the last words of 12 famous people

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Throughout history, hundreds of historical figures have left their mark on the world through their marvelous achievements. When their lives came to an end, their last words were often a reflection of their lives and ideals. From George Washington and Mark Twain to Frank Sinatra and Leonardo Da Vinci, in this article, we will reveal 12 final words of memorable personalities.

Image: The New York Public Library

After serving two terms as the United State's first president, George Washington retired to his Virginia plantation. In mid-December 1799, he developed a cold and a severe sore throat. Despite doctors' efforts to cure him, the end was imminent.

His long-time secretary, Tobias Lear, was at his side during his last days and documented all the events that transpired, including the former president's last words. According to his account, shortly before he took his last breath George Washington said "Tis well" —an old-fashioned way of saying "everything is okay."

Image: Signal Corps Archive from United States, Public domain, via Wikimedia Commons

Noir icon of perpetual elegance and rebellious charisma, Humphrey Bogart is an undisputed legend in cinema history. A Hollywood Golden Age star, Bogart is still remembered today for his scar on his upper lip, his everlasting cigarette, and his perfect portrayal of gangsters and detectives.

At the age of 57 Bogart was diagnosed with esophageal cancer, for which he was hospitalized for several months. According to lore, the legendary star's last words were "I should never have switched from scotch to martinis." However, his wife Lauren Bacall confirmed that the last thing he actually said was "Goodbye Kid. Hurry back," before she left his bedside to get their children.

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As one of the greatest American writers of all time, Mark Twain is usually credited with all sorts of great quotes that he often didn't say. For that reason, there are different versions of what his last words were before he died in 1910 at the age of 74.

The most plausible theory can be found in an article published one day after his death. According to this chronicle, Samuel Langhorne Clemens' last words were not spoken aloud but written. The famous humorist and essayist reportedly wrote to his daughter Clara, who accompanied him on his bedside, "Give me my glasses."

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Joan Crawford, the Oscar winner for Mildred Pierce and one of the greatest stars of Hollywood's golden age, died in 1977 of a heart attack.

The actress, who had a complicated personality, was true to her nature until her last breath. She was so ill that her doctor felt it wasn’t worth taking her to the hospital. One of her nurses began to pray aloud in desperation. Losing her patience, Crawford snapped for the last time and said, "Damn it... Don't you dare ask God to help me."

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The year 2024 marked the 700th anniversary of the death of the man who better described remote lands. Marco Polo was a merchant who spent more than 20 years of his life traveling through the Orient and wrote about his adventures in a book that became a bestseller when the printing press wasn’t even invented.

Marco Polo was, and still is, a legend. When, on his deathbed, his wife and friends begged the brave explorer to confess if what he had told in the book was true, he barely whispered: "I have not told the half of what I saw and did."

Image: MGM, Public domain, via Wikimedia Commons

Julius Henry Marx, better known as Groucho Marx, is considered one of the most influential comedians of all time. The man with the bushy black mustache was one of the Marx Brothers. Together they made 13 films, including the classic Duck Soup. After a long and prominent career, Groucho passed away in Los Angeles in 1977 at the age of 86.

His brilliant one-liners are still remembered and replayed to this day, so it is not surprising that not one but several final words are attributed to him. A few close friends have suggested that his last line was "This is no way to live!", while most suggest that his last words were in fact dedicated to his wife: "Die, my dear? Why, that's the last thing I'll do!"

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Voltaire, the French writer, philosopher, historian, and lawyer, one of the major figures of the Enlightenment, died in 1778 at the age of 83. Different accounts of his deathbed make it impossible to determine exactly what his last days were like.

One of these stories, however, is consistent with his ideas about God and his well-known criticism of the Church. According to this version, when the priest asked him if he wanted to renounce Satan before he died, Voltaire replied, "This is no time to make new enemies."

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L. Frank Baum was a prolific American author. He wrote 55 novels, 82 short stories, and more than 200 poems. However, his most memorable work is his series of children's fantasy books The Wonderful Wizard of Oz.

On May 5, 1919, Baum suffered a heart attack. He died the next day, shortly before his 63rd birthday. Disturbed by the imminence of death, he whispered to his wife: "Now we can cross the Shifting Sands," a clear reference to the Land of Oz.

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Augustus, the first Roman emperor, is often attributed with the phrase: "Behold, I found Rome of clay, and leave her to you of marble," alluding to the great infrastructural works carried out during his prosperous 40 years of rule.

However, according to other historical accounts, his last words were addressed to the friends who stayed with him on his deathbed: "Have I played the part well? Then applaud, as I exit."

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"Darling, you've gone through worse and you can beat this too. You have to fight," implored Barbara Marx, Frank Sinatra's fourth wife, to her beloved on his deathbed. "I'm losing," The Voice whispered through teary eyes.

Barbara recounted the last hours of the singer of such hits as My Way and New York, New York in her memoir Lady Blue Eyes: My Life With Frank. Frank Sinatra, one of the most popular entertainers of the mid-20th century, pronounced his last words in 1998 at the age of 82.

Image: Jean-Auguste-Dominique Ingres, CC0, via Wikimedia Commons

Despite being one of the most famous artists of the Renaissance, Leonardo da Vinci was very hard on himself. All his life he challenged his own limits, evident in his paintings and sculptures as well as in his inventions, some of which were truly revolutionary.

Even after a lifetime of success, he wasn’t quite satisfied. When he suffered a stroke at the age of 67, he sent for a priest to receive the Holy Sacrament and, according to historians, his greatest regret was that he hadn’t achieved excellence with his work. In that sense, it is said that his last words were: "I have offended God and mankind because my work did not reach the quality it should have."

Image: National Museum of Health and Medicine, Public domain, via Wikimedia Commons

The Yankee Clipper was one of the greatest baseball players of all time but he is also known for having been married to the iconic American actress Marilyn Monroe. Joe and Marilyn were together for less than three years. In 1955 the actress left him for American playwright Arthur Miller.

DiMaggio was devastated. He never married again, and never got over his one true love. His last words before he died in 1999 at the age of 84 were: "I'll finally get to see Marilyn."