Considering most fruits have a spherical or ovate shape, the average banana’s long, curved appearance is something of an anomaly. This unique curvature is due to a scientific concept called negative geotropism, where the stem flexes upward as the plant grows, rather than being pulled straight down by the forces of gravity. While most fruits simply absorb sunlight and grow down toward or into the earth, bananas begin to curve as they strive to find sufficient sunlight to fuel their growth. This has to do with the unique presence of photosensitive hormones called auxins, which influence how bananas react to light.
Bananas contain naturally occurring radionuclides, particularly the potassium-40 isotope. But eating a single banana provides an infinitesimal dose of about 0.01 millirems of radiation. In other words, you’d need to eat 274 bananas every day for seven years to develop radiation poisoning.
Some bananas grow in lush rainforests with dense canopies, which can obscure the fruit from getting enough light. In these cases, bananas will grow toward the sky to break through the light-blocking canopy. But negative geotropism still occurs even in other environments where there’s plenty of direct sunlight. The auxins are distributed unevenly along the side of the banana facing the sun, triggering accelerated growth on that side and causing the fruit to curve away from Earth’s gravitational pull.
In the very early stages of development, bananas actually grow at a straight downward angle, developing their signature shape later on. As the fruit matures, it will begin to flex upward in search of additional sustenance. But even as this happens, gravitational forces will continue to pull the banana down toward the ground and away from the sun. This combination is what ultimately gives bananas their distinct curve.
A visual artist once sold two bananas for $120,000 each.
In 2019, visual artist Maurizio Cattelan unveiled a conceptual piece titled “Comedian” at the Art Basel exhibition in Miami Beach. This unusual artistic work consisted of a banana that had been duct-taped to the wall. For years, Cattelan had dreamed of creating a sculpture in the shape of a banana; he often brought a banana with him on his travels and hung it on the wall for inspiration. But eventually, he gave up on the idea of creating a new sculpture and instead decided to exhibit the banana itself. He brought three editions of “Comedian” with him to Miami, two of which immediately sold for $120,000. Given the high level of interest, Cattelan raised the price of the third one to $150,000, which also promptly found a buyer. A week later, performance artist David Datuna ate one of the pricey fruits right off the wall, criticizing the artwork for embodying wealth inequality and food insecurity.
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Bennett Kleinman is a New York City-based staff writer for Inbox Studio, and previously contributed to television programs such as "Late Show With David Letterman" and "Impractical Jokers." Bennett is also a devoted New York Yankees and New Jersey Devils fan, and thinks plain seltzer is the best drink ever invented.
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Like a lot of masterpieces from centuries past, “The Last Supper” has undergone significant changes since it first saw the light of day. Perhaps most significantly, Leonardo da Vinci’s most famous work not named “Mona Lisa” originally included Jesus’ feet. That particular detail was lost in 1652, when the installation of a doorway on the refectory where the mural was painted led to removing the portion that included Jesus’ sandals. Efforts to digitally restore “The Last Supper” to its original form after centuries of decay have recently made it possible to see not only Jesus’ feet in detail but also the spilled salt shaker on the table (which has been widely interpreted as foretelling doom) as well as Judas’ coin purse.
Frescoes are painted on wet plaster, which requires painters to finish before it dries. Not wanting to do that, Leonardo instead used dry plaster — which means the masterpiece technically doesn't count as a fresco.
If you’d like to see the work today, you won’t be traveling to a regular museum. “The Last Supper” remains in Milan’s Santa Maria delle Grazie, on whose walls it was originally painted (probably between 1495 and 1498), and the convent wasn’t exactly built with large crowds in mind. Small groups are allowed in every 15 minutes, and visitors are advised to make reservations as early as possible — a limited number of people are allowed to see “The Last Supper” each day.
Leonardo’s full name was Leonardo di Ser Piero da Vinci.
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Leonardo da Vinci often wrote backward.
Though no one’s sure why, Leonardo — not simply an artist but a polymath and prolific inventor — had a habit of writing backward. Theories attempting to explain his “mirror writing” include the possibility that he was actually left-handed and taking great pains to avoid ink smudges and keep his hands clean, or that he wanted to make it difficult for prying eyes (including those of the Catholic Church) to uncover his secrets. (He also used his own special form of shorthand.) The habit was so ingrained, according to the Museum of Science, that “only when he was writing something intended for other people did he write in the normal direction.”
Michael Nordine
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Michael Nordine is a writer and editor living in Denver. A native Angeleno, he has two cats and wishes he had more.
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Only 45 people have ever become president of the United States, making it one of the world’s most exclusive clubs. But even rarer are the 43 people ever known to have “golden blood,” by far the most uncommon blood type.
There are four main blood groups — A, B, O, and AB — but there are also many other, less common types, with Rh null blood, also known as “golden blood,” being almost unfathomably rare. “Rh” is short for Rhesus factor, a group of more than 50 antigens, the most common of which is RhD. People with RhD in their blood have a positive blood type, and people who don’t have RhD in their blood have a negative blood type. Those without any of the 50+ Rh antigens, meanwhile, have Rh null blood.
People with AB positive blood are universal recipients.
AB positive blood recognizes all potential antigens as safe, meaning people with that blood type can safely receive blood from any other type.
In addition to being incredibly rare, “golden blood” carries serious risks related to transfusion. People with Rh null blood in need of a blood transfusion could be in danger if they receive any non-Rh null blood type, which contains antigens their body may reject because they aren’t present in Rh null. This includes O negative blood, whose carriers are otherwise considered universal donors. There are 47 known blood groups and 366 different antigens, highlighting just how rare "golden blood” really is.
Though most of us will have the same blood type for our entire lives, there are a number of instances in which blood type can change. The most common is after a bone marrow transplant, as bone marrow produces red blood cells. If a transplant between a donor and recipient with different blood types is successful, the recipient will inherit the donor’s type.
A change can also temporarily happen after a blood transfusion, specifically when a donor receives large amounts of blood of a different type; after a few months, however, the recipient’s marrow will replace the new blood type with the old one.
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Michael Nordine is a writer and editor living in Denver. A native Angeleno, he has two cats and wishes he had more.
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When McDonald’s tried to add bubble gum-flavored broccoli to Happy Meals, kids weren’t lovin’ it. In 2014, the fast-food giant’s then-CEO, Donald Thompson, revealed the bizarre experiment at an event hosted by a venture capitalist firm. Under pressure to make Happy Meals healthier, the company reflected on how toothpaste and amoxicillin producers had used artificial bubblegum flavoring to make their goods more palatable to children. McDonald’s decided to try a similar tactic with the divisive cruciferous veggie.
Former McDonald's owner and CEO Ray Kroc met Walt Disney when they were teenagers.
After lying about their ages to join the World War I effort, the Illinoisians became acquainted at a Connecticut camp that trained them to serve in the Red Cross Ambulance Corps. The war ended before either Kroc or Disney had a chance to use their skills, however.
Mickey D’s food scientists did successfully make broccoli taste like bubble gum, likely by employing a combination of strawberry, banana, and cherry flavors. However, a focus group of kids was confused by the final product, which they enjoyed about as little as standard broccoli (we’re guessing it wasn’t pink). The item was never added to the McDonald’s menu. Parents who want to impress their kids with a taste bud switcheroo will have to settle on cotton candy grapes.
A piece of gum turns “Charlie and the Chocolate Factory” character Violet Beauregarde into a giant blueberry.
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Swallowed gum does not stay in your stomach for seven years.
The old wives’ tale about gum in the gut has alarmed children for generations. It might have originated from the scientific truth that gum’s base — like corn and seeds — cannot be digested, although our bodies are able to break down sweeteners and oil derivatives present in gum. An accidentally gulped piece of Dubble Bubble won’t stick to the stomach wall or intestinal tract: Gum drifts through your digestive system within a few days.
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All dogs bark, from the deep bellow of a Great Dane to the shrill yap of a Chihuahua. But there's one exception to this rule: The basenji breed is known as the “barkless dog,” though it’s not quite silent, either. Instead of barking, basenjis make a yodel-like noise called a “baroo,” which sounds more like a howl. This inability to bark is due to the unusual shape of a basenji’s larynx, aka voice box. Basenjis have narrower ventricles than other dogs, limiting the movement of their vocal cords and resulting in this sonic oddity.
The Greeks used spiked collars to protect dogs from wolves.
The ancient Greeks relied on spiked collars to keep their pooches safe. Those bygone collars were often made from metal or leather and had protruding spikes to deter wolves from biting a dog’s neck. They were primarily worn by farm dogs who protected flocks from wolves.
Basenjis’ lack of bark makes them useful hunting dogs in their native Central Africa, leading some researchers to theorize they were selectively bred to sound this way. The lack of a loud and less conventional barking noise avoids scaring off prey, and the barooing means they sound more like a jackal or hyena than a hunting dog. While hunting, basenjis also sometimes jump up and down to catch sight of potential prey. In fact, in Swahili, the breed is called m’bwa m’kube m’bwa wamwitu, which translates to “dog that jumps up and down.”
In addition to the unusual vocalizations, basenjis have a few other unique distinctions compared to their fellow dog breeds. They’re known to be quite fastidious, regularly cleaning themselves — much like housecats — so they typically lack a potent doggy odor. Also, female basenjis go into heat only once per year, compared to other breeds that average twice annually.
The most popular dog breed in the U.S. as of 2024 is the French bulldog.
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The Norwegian lundehund has six toes on each paw.
Dogs typically have 18 toes — five on each front paw and four on their hind paws. But the Norwegian lundehund averages more than any other breed, with six toes on each paw, for 24 in total. Their feet have four toes pointing forward and two that point inward, much like human thumbs.
Those additional toes aren’t just for aesthetics; they help lundehunds when puffin hunting, which is the purpose for which they were originally bred. Puffins — or lunde, as they’re known in the Norwegian language — are a major source of food for Norwegian farmers, who relied on lundehunds to help hunt the birds. Not only do the extra toes provide the dogs with traction when traversing slippery rocks, but they also help them to more efficiently burrow into tight passages in search of puffin nests.
Bennett Kleinman
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Bennett Kleinman is a New York City-based staff writer for Inbox Studio, and previously contributed to television programs such as "Late Show With David Letterman" and "Impractical Jokers." Bennett is also a devoted New York Yankees and New Jersey Devils fan, and thinks plain seltzer is the best drink ever invented.
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Lady Liberty opted to go green long before most New Yorkers. In 1885, French sculptor Frédéric Auguste Bartholdi dismantled his gleaming copper-skinned creation — a gift to the U.S. from the French people — into 350 pieces for its voyage across the Atlantic. The statue was eventually rebuilt atop Bedloe’s Island (now called Liberty Island) in New York Harbor, but during the next two decades or so, the landmark underwent a prominent color change.
Thomas Edison wanted the Statue of Liberty to talk.
After completing his design for the phonograph in 1877, the prolific inventor wanted to install one inside Lady Liberty. Edison envisioned a statue that could deliver speeches at a volume that reached Manhattan’s northernmost edge.
The now-familiar minty tint is actually a patina, a common coating that forms on copper as well as its alloys brass and bronze. The patina is a result of the chemical reactions the statue has endured in its environment, an urban center surrounded by water. Over the years, the copper has reacted to oxygen, sulfuric acid, chloride, and other components of the surrounding air and water, changing its mineral composition in a gradual evolution. Today, chemists believe the seafoam-green hue has stabilized. And while there’s occasionally been talk of repainting the statue or polishing off her patina, public sentiment — and input from copper manufacturers — has kept “Liberty Enlightening the World” from being returned to her initial metallic sheen. Fortunately, the patina is protective, which means Liberty’s chameleonlike qualities actually help preserve her.
“The New Colossus,” the poem on the pedestal of the Statue of Liberty, was written by poet Emma Lazarus.
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The Statue of Liberty shares a designer with the Eiffel Tower.
Lady Liberty’s first internal designer, Eugène Viollet-le-Duc, died in 1879, so Bartholdi asked bridgemaker Alexandre-Gustave Eiffel to take over the job. Eiffel improved on the existing blueprints by adding a giant central support structure as foundation for the truss work holding up the copper exterior. This tactic increased the structure’s flexibility, making it less susceptible to cracking or warping. During windy spells, the Statue of Liberty can sway up to 3 inches in any direction — slightly more than the top of the Eiffel Tower. Once his work was complete, Eiffel engineered his namesake showpiece between 1887 and 1889.
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Original photo by /\/\itul Patel/ 500px via Getty Images
Every teacher has rolled their eyes at the “my dog ate my homework” excuse, but it really happened to one of America’s most revered authors. In 1936, John Steinbeck’s dog Toby, an Irish setter, turned the first draft of Of Mice and Men into a snack. In a letter dated May 27 of that year, the future Pulitzer and Nobel Prize winner wrote that he “was pretty mad, but the poor little fellow may have been acting critically.”
Steinbeck disavowed the movie he wrote for Alfred Hitchcock.
Steinbeck wrote the novella “Lifeboat” at Hitchcock’s request, but asked the studio to remove his name from the 1944 film adaptation due to its “slurs against organized labor” and stereotypical portrayal of a Black character Steinbeck wrote as a “thoughtful and intelligent seaman.”
Steinbeck estimated that Toby making “confetti” of the manuscript would set him back by about two months, but it may have been worth it: Steinbeck’s short, tragic tale of two migrant workers eking out a humble existence in California during the Depression is among the author’s most moving and accomplished works, which is saying something for the man responsible for both East of Eden and The Grapes of Wrath. Steinbeck, a lifelong dog-lover, later wrote a travelogue featuring his poodle called Travels With Charley.
“Of Mice and Men” was Steinbeck’s attempt at a new form called the play-novelette.
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No, “The Grapes of Wrath” was not called “The Angry Raisins” in Japan.
Much is lost in translation, but the title of Steinbeck’s most acclaimed novel wasn’t one of those things. The oft-cited rumor that The Grapes of Wrath carried the title The Angry Raisins in Japan comes from a 1996 New York Times article written about Elaine Steinbeck, the author’s widow, but no evidence supports it. The anecdote has spread far and wide nevertheless, thus proving — quite literally, in this case — a quote misattributed to Mark Twain: “A lie can travel halfway around the world while the truth is still putting on its shoes.”
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Michael Nordine is a writer and editor living in Denver. A native Angeleno, he has two cats and wishes he had more.
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Original photo by The Picture Art Collection/ Alamy Stock Photo
New Jersey is known for its beach boardwalks, saltwater taffy, and colonial American history. But many people don’t know that the tiny East Coast state was also once home to Joseph Bonaparte, Napoleon’s eldest brother and the former king of Naples and Spain. How the royal went from governing entire countries to living in the New Jersey countryside is thanks to his brother’s military conquests. After abdicating the French throne in 1814, Napoleon escaped exile and attempted to retake his former role. However, the campaign ended with the Battle of Waterloo, where his troops were defeated by the British. Knowing his brother would likely return to exile, Joseph Bonaparte feared he was also at risk of banishment. His solution: to flee Europe, in disguise, by way of a ship heading to New York.
The famed military general is sometimes said to have had ailurophobia, a fear of cats, but historians say there’s no evidence to support the claim. Napoleon may have simply been lumped together with other conquerors said to fear cats, such as Julius Caesar and Alexander the Great.
In America, Bonaparte spent time in Philadelphia among other French expatriates before settling along the Delaware River in Bordentown, New Jersey. In 1816, he began construction of Point Breeze, an enormous estate once said to rival the White House. Situated between New York and Philadelphia, the 1,800-acre estate included a 38,000-square-foot mansion, sculpture gardens, carriage trails, bridges, and a human-made lake — which attracted prominent visitors such as John Quincy Adams and the Marquis de Lafayette. At the time, Bonaparte’s personal library was larger than the Library of Congress and he maintained the largest private art collection in the U.S. — both of which, along with the grounds, were often open for public enjoyment. Bonaparte left Point Breeze in 1839 for London and today little of the estate survives, but in 2021 the City of Bordentown (with help from the state government and nonprofit groups) purchased the remains of Bonaparte’s retreat and transformed it into a new city municipal complex.
Visitors to Joseph Bonaparte’s estate sailed the lake in swan-shaped boats.
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New Jersey was once two provinces.
New Jersey once went by two titles — East Jersey and West Jersey. When Britain took control of the land in 1664 from the Dutch (who had called it New Netherlands), the area was renamed New Jersey for the Island of Jersey in the British Channel Islands, then divided from north to south and overseen by separate governors. West Jersey was given to Lord John Berkeley, a British politician, while East Jersey was managed by Sir George Carteret — who once governed the Island of Jersey himself. However, the split didn’t last long; in 1702, the divided provinces were merged together, becoming the New Jersey we know today.
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Nicole Garner Meeker is a writer and editor based in St. Louis. Her history, nature, and food stories have also appeared at Mental Floss and Better Report.
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The day after Thanksgiving is known for the deluge of holiday shoppers that descends on stores for serious savings. Some will tell you that the term “Black Friday” originally referred to the bottom lines of these stores, as the day of skyrocketing sales sent them out of the “red” (losing money) and into the “black” (making money) — hence, “Black Friday.” However, the origins of the phrase are a bit murkier. The first known use of “Black Friday” to describe the day after Thanksgiving comes from the November 1951 issue of the page-turning magazine Factory Management and Maintenance. In it, a writer hyperbolically describes the day as “a disease second only to the bubonic plague in its effects. At least that’s the feeling of those who have to get production out, when the ‘Black Friday’ comes along. The shop may be half empty, but every absentee was sick.” In other words, “Black Friday” wasn’t about hordes of shoppers pulsing through stores, but weary (and possibly hungover) factory workers calling in sick.
Many nations around the world reserve a day on the calendar to give thanks. For example, Canada celebrates its Thanksgiving on the second Monday of October (and yes, Canadians also eat turkeys). Other nations around the world similarly give thanks but with varying traditions.
Although this is the first recorded use of the term, it’s unlikely that this version is what eventually became known across the U.S. as “Black Friday” in the late 20th century. Our modern sense of the term likely originated elsewhere in the 1950s, when Philadelphia cops began using “Black Friday” to describe the traffic mayhem of shoppers and sports fans descending on the city after Thanksgiving and before the Army-Navy football game on Saturday. Philadelphia stores tried to change the name to “Big Friday” but failed, and instead transformed the day’s negative connotation into a positive one, and the idea of “Black Friday” as a day of financial solvency was born.
The Wampanoag tribe inhabited the land now known as Plymouth, Massachusetts, before the Pilgrims.
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Benjamin Franklin never wanted the turkey to be the national bird.
A common myth from the United States’ nascent years is that Benjamin Franklin, the polymath inventor and founding father, advocated for the humble turkey to be the national avian symbol rather than the more fearsome-looking bald eagle. Although Franklin loved turkeys more than your average 18th-century celebrity, he never seriously considered the turkey a suitable U.S. icon. The myth originates from a letter Franklin wrote criticizing the Society of the Cincinnati, a hereditary patriotic organization founded by former Revolutionary officers in 1783 (and, incidentally, the inspiration for the name of Cincinnati, Ohio). Franklin wrote that the bird on the society’s seal looked more like a turkey than an eagle. To clarify that he was not maligning the noble game bird, Franklin described the turkey as a “respectable bird,” a “true original Native of America,” and a “Bird of Courage.” Conversely, Franklin described the bald eagle as a creature of “bad moral Character.” Yet the larger focus of the letter was meant to criticize the hereditary nature of the Society of Cincinnati, which Franklin felt was contrary to American principles. He never actively advocated for the turkey to replace the bald eagle, and his bird-related comments may have been intended merely as a humorous aside.
Darren Orf
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Darren Orf lives in Portland, has a cat, and writes about all things science and climate. You can find his previous work at Popular Mechanics, Inverse, Gizmodo, and Paste, among others.
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At first glance, Jackson, Mississippi, is like any other state capital, with its domed Capitol building standing squarely in the heart of the city. However, 2,900 feet below the surface lies a surprising secret — an ancient volcano. Although the West Coast and Hawaii are the U.S.’s biggest volcanic hot spots, millions of years ago active volcanoes also dotted the northern Gulf of Mexico region. One of these volcanoes was the Jackson Volcano, and the city’s Mississippi Coliseum now sits above its ancient crater. Thankfully for the city’s residents, the volcano is extinct and hasn’t erupted since around the age of the dinosaurs.
Over the past 12,000 years, the U.S. has had the most active volcanoes of any country.
With its West Coast located along the Ring of Fire, and Hawaii resting on top of a volcanic hot spot, the land within today’s U.S. borders has experienced the most volcanic activity during the current Holocene Epoch. However, Indonesia has experienced the most activity since 1950.
The Jackson Dome formed in what’s known as the Mississippi Embayment, a sedimentary basin that was an extension of the Gulf of Mexico coastal plain, around 70 million years ago. Despite being buried by layers of rock due to various geographic transformations over millions of years, the volcano’s presence is still felt in surprising ways. Because of the dense igneous rock of the volcano, gravity is slightly stronger in the area, making Jacksonians heavier than their fellow Mississippians. And while Jackson is the only capital city set atop a volcano, volcanic formations can also be seen within the limits of other U.S. cities, including Portland, Oregon, and Honolulu, Hawaii.
“Mississippi,” a French derivative of the Ojibwa tribe’s name for the river, means “Gathering of Waters.”
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Volcanoes caused the most severe extinction event in Earth’s history.
Some 252 million years ago, an event known as the end-Permian extinction, or “the Great Dying,” killed nine out of every 10 living species on Earth. The change to the planet was profound: The event spelled the end of the 47 million-year-long Permian geologic period, cleaned the terrestrial slate, and allowed reptiles to evolutionarily outpace protomammals to become the new dominant life-form on Earth — dinosaurs. Although a variety of things likely coalesced to kick-start the Great Dying, one key culprit took place in an area known today as the Siberian Traps, a hilly region in northern Russia. Beginning around 252 million years ago, this region erupted continuously for 2 million years and covered 2.7 million square miles in lava. The volcanoes also pumped a massive amount of carbon dioxide into the atmosphere, causing a runaway greenhouse effect that led to hotter temperatures and increased ocean acidification. Scientists estimated that at one point during this extinction event, ocean water near the equator reached hot-tub-level temperatures of about 104 degrees Fahrenheit. Today, the dramatic activity that took place in the Siberian Traps is the largest known volcanic event of the past 500 million years.
Darren Orf
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Darren Orf lives in Portland, has a cat, and writes about all things science and climate. You can find his previous work at Popular Mechanics, Inverse, Gizmodo, and Paste, among others.
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