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The history of the U.S. flag is almost as multifaceted as the people it represents. With dozens of different iterations, the Stars and Stripes has frequently changed as the country’s borders have expanded and new states have been added to the union. Today’s 50-star flag is hoisted at sporting events, schools, government buildings, and near the homes of millions of Americans throughout the world. These six facts pull together the threads of the flag’s 250-year history, including its creation, its symbolism, and where we’ll eventually have to squeeze that 51st star.

 Betsy Ross and her assistants sewing the first American flag.
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Betsy Ross Didn’t Design the Original U.S. Flag

The most enduring myth about the origin of the U.S. flag is that Betsy Ross, an American upholsterer living in Philadelphia during the Revolutionary War, created the first flag at the behest of George Washington. Historians aren’t sure that ever happened, however. The source for Ross’ involvement came from her own family, nearly a century after Ross reportedly created the flag. Apart from her descendant’s account, no evidence suggests that Ross sewed the first flag. Instead, some historians think Francis Hopkinson, a signer of the Declaration of Independence and designer of other seals for U.S. government departments, is likely the first flag’s creator. Evidence exists that Hopkinson sought payment for the design of the “flag of the United States of America” (he thought a “Quarter Cask of the Public Wine” ought to do it). Although Hopkinson was denied payment, Congress approved his flag on June 14, 1777 (celebrated today as Flag Day). Thankfully, historians now generally give Hopkinson the vexillological accolades he deserves.

Illustration of the Grand Union Flag of 1776.
Credit: Kean Collection/ Archive Photos via Getty Images

State militias fought the Revolutionary War’s opening skirmishes using colonial banners, but by the winter of 1775, the Second Continental Congress became the de facto war government of the fledgling U.S. — and they needed a flag to unite the cause. Congress went with something already on civilian and merchant ships, the British red ensign, and sewed on six horizontal stripes resembling the 13 red-and-white stripes on today’s flag. This creation became known as the Grand Union flag, and even featured the Union Jack (sans the St. Patrick’s cross) as a canton (the innermost square on the top left), instead of the usual constellation of white five-pointed stars.

The resulting flag was first hoisted on December 3, 1775, on the man-of-war Alfred, by none other than John Paul Jones, one of the greatest naval commanders in U.S. history. Years later, in 1779, the famous naval officer recalled the day: “I hoisted with my own hands the Flag of Freedom…”

Flag of Cowpens along with a flag of the United States of America.
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There Are 27 Official Versions of the American Flag

Although the Grand Union Flag was the first banner to unite the colonies’ cause under one emblem, the flag isn’t regarded as an “official” U.S. flag. That lineage begins with the passage of the Flag Act of 1777, which states “[t]hat the flag of the thirteen United States be thirteen stripes, alternate red and white; that the union be thirteen stars, white in a blue field, representing a new constellation.” The colors themselves represent valor (red), purity (white), and vigilance (blue). Some flags included different versions to appeal to this description, such as the so-called Betsy Ross flag, Hopkinson’s 3-2-3-2-3 star arrangement flag, and the Cowpens flag (basically the Betsy Ross, but with a star in the middle of the circle). Hopkinson’s creation is widely regarded as the first conception of what would be recognizable today as a U.S. flag.

Throughout the years, the flag has undergone 26 small changes in order to add new stars for new states joining the union. The first change came in 1795, with the addition of Vermont and Kentucky (which added two extra stripes as well), and this version is what’s known to history as the Star-Spangled Banner. The last canton edit came on August 21, 1959, when President Eisenhower issued Executive Order 10834, establishing today’s 50-star flag following Hawaii’s statehood.

the flag flown during the war of 1812, on display at the Smithsonian Castle.
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The Original “Star-Spangled Banner” Still Exists

After a night of heavy bombardment during the Battle of Baltimore in the War of 1812, American forces stationed at Fort McHenry raised the Star-Spangled Banner (the 15-star flag) on the morning of September 14, 1814. Seeing this flag while standing aboard a British ship and negotiating the release of a prisoner, author Francis Scott Key composed the poem “Defence of Fort M’Henry,” which later became the lyrics for the U.S. national anthem (adopted by Congress in 1931).

The original flag was sewn by Mary Pickersgill and Grace Wisher, her enslaved servant, and stretched some 30 feet by 42 feet — an extremely large flag at the time. The gargantuan size of the Star-Spangled Banner was a specific request of Fort McHenry’s commander, George Armistead, who told the head of Baltimore’s defenses that “it is my desire to have a flag so large that the British will have no difficulty in seeing it from a distance.”

Amazingly, the very flag that inspired the 35-year-old poet more than 200 years ago still exists, and is now in the care of the Smithsonian Institute — though sadly not quite in its original condition. For nearly a century, the flag remained in the care of Armistead’s descendants, who made a habit of cutting off pieces of the flag to give as souvenirs. Today, the Star-Spangled Banner is only 30 feet by 34 feet. Although the Smithsonian has recovered many of the lost pieces over the years, some prominent pieces — including a missing 15th star — have never been recovered.

Astronaut Buzz Aldrin, lunar module pilot, stands beside an American flag placed on the moon.
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The U.S. Flags on the Moon Are Probably White Now

Today, the U.S. flag is one of the only banners that’s been hoisted somewhere other than planet Earth. Six of the NASA Apollo missions (1969 to 1972) planted a U.S. flag on the moon (the Apollo 11 flag reportedly fell down when the astronauts blasted off from the lunar surface), but decades of UV radiation from unfiltered sunlight have likely bleached the remaining flags white. For example, the Apollo 11 Stars and Stripes wasn’t some meticulously designed space flag capable of surviving the harsh lunar climate, but a $6 nylon flag that may have been purchased at a Sears Roebuck in the Houston area. Some have theorized that the nylon could’ve disintegrated completely, but NASA has examined flag sites using the Lunar Reconnaissance Orbiter and has found evidence of the flags still “flying.” In November 1969, only a few months after Neil Armstrong took his famous “one small step” on the moon, U.S. Congress passed a law stipulating that a U.S. flag would adorn any moon, planet, or asteroid during missions fully funded by the Americans. In other words, an international effort to land on Mars, for example, means no U.S. flag will fly on the red planet (not that it’d last very long anyway).

American flag waving with the Capitol Hill building beside it.
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The U.S. Flag Might Need a 51st Star Pretty Soon

The 50-star U.S. flag is the longest-serving banner in U.S. history, being the country’s official flag for more than 60 years (the 48-star flag comes in second, at 47 years). However, three primary candidates — Puerto Rico, Washington, D.C., and Guam — could one day necessitate a new U.S. flag with 51 (or more) stars. To solve this constellation conundrum for all future generations, the online magazine Slate asked a mathematician to develop a model for the U.S.’s 51-star flag, as well as other flags containing as many as 100 stars. Potentials for a 51-star flag include six alternating rows of nine and eight stars, or a variation on the 44-star Wyoming pattern (created to accommodate Wyoming’s admission to the union in 1890), which would use five rows of seven stars sandwiched between two rows of eight stars. (As a refresher, the current flag has five rows of six stars and four rows of five stars.)

This isn’t the only competing 51-star flag; the pro-statehood New Progressive Party of Puerto Rico designed a flag similar to the original Betsy Ross flag, but the circle is instead jam-packed with 51 stars. The most likely 51st state, Puerto Rico, continues its push for statehood, and it’s possible that the long reign of the 50-star flag could be nearing its end.

Darren Orf
Writer

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.

Original photo by lucato/ iStock

We’ve all heard that we have five senses — sight, smell, hearing, touch, and taste. That idea goes back to the Greek philosopher Aristotle. However, it’s wrong.

Modern science has identified as many as 32 senses, by looking at receptors in our bodies with the job of receiving and conveying specific information. Our senses also tend to work in tandem without us noticing a connection. We mostly take this intricate system for granted — until something goes wrong, and we gain a deeper appreciation of the complexity of the human body. Learning more about our senses can help us both understand health problems and appreciate the many ways our bodies perform beautifully. Here are six senses you probably didn’t know you possess.

Stick figure balancing on a string.
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Vestibular Sense (Equilibrioception)

The vestibular sense is one of balance and orientation. Whenever we move our heads, we activate a set of receptors in the inner ear that allow us to balance. The vestibular sense is also activated by the downward force of gravity. It allows us to know which way is up or down, right or left.

Balance exercises can help boost the vestibular sense, which begins to decline after age 40. That’s why the elderly may be unsteady on their feet. Side note: “Out of body” experiences may be episodes when the vestibular sense doesn’t work normally. It’s a scary sensation, not feeling “grounded.”

Athlete doing a calf stretch with ankle tape.
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Proprioception

Our muscles and joints contain receptors that deal with how our bodies occupy space. These proprioception receptors make it possible to walk down the street without constantly banging into someone (although cell phones don’t help), climb stairs without looking down, or touch our fingers to the tip of our noses.

These same receptors provide feedback about how our muscles are affecting the environment. A child who uses too much force when writing or coloring, for example, may need proprioception coaching. Football players, on the other hand, are proprioception experts. They move fluidly around obstacles, seeing them from afar, and know exactly how hard to throw the ball.

Close-up of a woman suffering acute pain.
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Inner Sensing (Interoception)

People also vary a great deal in their awareness of inner body signals, known as interoception. Someone who doesn’t pick up on stomach fullness may eat or drink too much. Someone who doesn’t notice a stomach rumbling may eat too little. Children with autism spectrum disorder (ASD) sometimes need to be reminded to eat, for example. We also notice when our hearts are beating faster or when we need the toilet.

Meditation practices that teach us to notice our breathing are, in effect, boosting our awareness of one kind of interoception signals, a system of body-wide receptors that communicate with a spot deep in the brain called the insular cortex. This inner sensing doesn’t just tell us if we’re hungry or tired. It allows us to note our own emotions, which often begin as physical sensations. That’s why meditation can help with both body awareness and emotional self-knowledge.

A woman warms up the frozen hands above hot radiator.
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Thermoception

We have special receptors in our skin that communicate with an area in the hypothalamus (known as the thermoregulatory center) to monitor temperature. There are at least six different kinds of external temperature receptors in our skin, each designed for a different temperature range. If the air gets cold, the appropriate cold receptors fire more to signal a change.

If receptors for outer temperature are exposed to a sensation for a long time, they stop firing as much. That’s why we can get used to cold if we’re patient. But nerve damage can take that too far, and lead us to miss important information. People who don’t feel cold sufficiently can get frostbite or, if they don’t feel heat quickly enough, a bad burn.

A woman feeling pain of her legs during jogging.
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Nociception

We actually know we have this one — it’s called pain. But for some time, pain wasn’t understood as being its own sensory system. Pain receptors can be classified into three distinct types: cutaneous (skin), somatic (bones, joints, muscles, and beyond), and visceral (body organs).

People vary in what’s called their “pain tolerance.” Nociceptors each have a minimum intensity of stimulation before they trigger a signal that gets passed along into the spinal cord to the brain. Different kinds of nerve fibers are responsible for fast, localized, sharp pain and slow, poorly localized, dull pain.

Clock connected to a human body with wires.
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Time

We speak of a “body clock,” but actually our bodies are full of clocks with different functions. Our circadian clock is tuned to the rise and fall of daylight and is disrupted when we cross several time zones or lose sleep. Other clocks are tuned for tiny intervals. Our sleep includes multiple 90-minute cycles; we have rhythms for blood pressure, hormone secretion, heart rate, and more.

But how do we perceive time? It’s a mystery. Many people have had the experience of waking up a second before the alarm goes off when they’re nervous about catching a plane — even if that’s not their usual wake-up time. Somehow, we can perceive time accurately while asleep. Some people know exactly how long a conversation has lasted and others have no idea. When we’re bored, time moves slowly. When we’re intensely engaged, time seems to stop and hours pass. Scientists are pinpointing areas of the brain that may provide our sense of time through body processes like breathing and heart rate. Although we don’t know how we perceive time, it’s clear that we do have a sense of time passing.

Temma Ehrenfeld
Writer

Temma Ehrenfeld has written for a range of publications, from the Wall Street Journal and New York Times to science and literary magazines.

Original photo by Edgar/ Unsplash

Even if you paid perfect attention in art history class, you might’ve missed these hidden features of classic works. Artists such as Edvard Munch and Picasso have secrets waiting to be uncovered — some with the naked eye, and some with more advanced technology.

What exactly is God bursting out of on the ceiling of the Sistine Chapel? Who is lurking behind one of Picasso’s most famous subjects? Which post-impressionist tried to paint a self-portrait, but quickly covered it up? These six works of art have some hidden depths.

People view the Norwegian artist Edvard Munch's 1895 work entitled 'The Scream'.
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Edvard Munch Hid a Message in “The Scream”

Norwegian artist Edvard Munch’s mental health was tied closely to his work, and one of his most famous paintings, “The Scream,” has an inscription to that effect. It reads Kan kun være malet af en gal Mand! — a Norwegian phrase that translates to “Can only have been painted by a madman!” The writing, in pencil at the top left of the painting, is tiny but visible to the naked eye if you look very closely, and infrared technology has recently been able to make it stand out a little bit more.

The inscription was noticed in 1904, 11 years after it was painted, at an exhibition in Copenhagen. At the time, critics thought that a vandal had left the message. But by looking at the writing more closely with infrared light, researchers were able to match the handwriting to the script in Munch’s diaries, which means Munch likely added it as part of the piece.

The Old Guitarist, Pablo Picasso.
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Pablo Picasso’s Famous Guitarist Has a Woman Behind Him

It’s not uncommon for painters to reuse their canvases; Monet did so frequently, as did other great artists. For decades, viewers reported seeing a ghostly woman behind the figure in Pablo Picasso’s “The Old Guitarist,” before researchers in 1998 used X-ray photography and infrared light to uncover what lies beneath. The full work shows a nude woman seated with her right arm in her lap and her left one extended. The image matches a sketch Picasso sent in a letter to a friend.

A visitor looks at the painting "Young Woman Powdering Herself" by French painter Georges Seurat
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Georges Seurat Painted Over a Slightly Creepy Self-Portrait

Young Woman Powdering Herself,” painted around 1890, shows artist Georges Seurat’s mistress Madeleine Knobloch seated at a vanity. In the top left corner, there’s an open window with a vase of flowers — but originally it was the artist’s face peeking through that window. A friend warned Seurat that it looked a little weird, so he replaced it with the still life. It would have been the only self-portrait of Seurat to exist if he’d kept it.

Painting depicting a view of Scheveningen Sands by Hendrick van Anthonissen.
Credit: Universal History Archive/ Universal Images Group via Getty Images

An Entire Whale Was Missing From a Dutch Masterpiece

View of Scheveningen Sands,” painted by Dutch artist Hendrick van Anthonissen around 1641, used to have an air of mystery. This seaside landscape painting shows multiple people standing on a beach looking at a spot where nothing much seems to appear — at least until recently. A 2014 restoration at Cambridge University’s Fitzwilliam Museum revealed what all the fuss was about: an entire beached whale, crudely painted over long after Anthonissen finished it. The restorers speculated that the whale was removed sometime in the 18th or 19th century, when obscuring a dead animal could make the work more valuable. Thanks to the restoration, the whale is now clearly visible.

Part of the artwork of Michelangelo that adorns the ceiling of the Sistine Chapel at the Vatican, Italy..
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The Sistine Chapel Ceiling May Have Brains on It

The Sistine Chapel features a series of 16th-century paintings by the artist Michelangelo depicting scenes from the book of Genesis. The most famous scene is “The Creation of Adam,” which shows a nude man touching fingers with an interpretation of God as an older bearded man surrounded by angels.

Michelangelo was an expert on human anatomy, inside and out — he started dissecting corpses in his late teens — but there are some irregularities in his figures on the chapel ceiling. Some medical professionals have found what they interpret as images of the human brain in a few different panels. In “The Creation of Adam,” God emerges from a red blob that looks a lot like a cross-section of a human brain. This theory was made famous by the TV show Westworld in 2016, but academic work on the similarity dates back to at least 1990. (Some academics think the red blob could actually be a uterus.)

More subtle brainlike images appear in other Michelangelo panels, too. Some bulbous irregularities in God’s neck in “The Separation of Light and Darkness” resemble the brain as seen from below, and a line running up the center of the figure’s chest almost perfectly resembles a human spinal cord and brain stem.

Someone points at a picture of "The Last Supper" by Leonardo Da Vinci.
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“The Last Supper” May Have Music Hidden Inside

Between 2003 and 2007, Italian musician Giovanni Maria Pala uncovered what he claims is a piece of music in Leonardo Da Vinci’s 15th-century masterpiece “The Last Supper.” According to him, spiritually potent elements in the painting, such as loaves of bread and the hands of Jesus and the Apostles, represent musical notes that appear once you draw five lines of musical staff down the length of the table. The piece he uncovered didn’t fully make sense to him until he read it from right to left — Leonardo da Vinci nearly always wrote backward. The 40-second passage he gleaned from the painting sounds like a requiem, which he says is best played on a pipe organ.

Sarah Anne Lloyd
Writer

Sarah Anne Lloyd is a freelance writer whose work covers a bit of everything, including politics, design, the environment, and yoga. Her work has appeared in Curbed, the Seattle Times, the Stranger, the Verge, and others.

Original photo by Laura Chouette/ Unsplash

Whether it’s sold in a bottle, can, or poured straight from the fountain, there are few drinks more refreshing than soda. Since carbonated water was invented in the 1700s by Joseph Priestley, brands such as Coke and Pepsi have grown into beloved staples of kitchens and restaurants everywhere. And when it comes to soda, there are plenty of interesting tidbits and historical anecdotes bubbling beneath the surface — like the six facts below.

Close-up of a can of Dr. Pepper.
Credit: Katherine Kromberg/ Unsplash

Dr Pepper Was Once Marketed as a Warm Beverage

Dr Pepper was first served around 1885 at Morrison’s Old Corner Drug Store in Waco, Texas. The drink was created by Charles Alderton in an effort to capture the fruity and syrupy smells wafting through the store. Though Dr Pepper was initially served cold at the time, the drink was briefly marketed as a warm beverage, a plan that was developed to ensure the brand’s continued popularity throughout the colder holiday months.

Hot Dr Pepper was first conceived of in 1958, when company president Wesby Parker found inspiration while visiting a bottling plant during a blizzard. The result was a new recipe developed by the company that encouraged consumers to heat Dr Pepper over a stovetop to 180 degrees and then pour it over a thin slice of lemon. The drink was marketed in ads using taglines such as “Devilishly Different” and “Winter Warmer,” and an alcoholic version containing rum, called the Schuss-Boomer, was later popularized. Hot Dr Pepper remained a beloved holiday drink into the 1970s, and though it has since faded in popularity, the beverage continues to be made each year by certain pockets of loyal fans.

Close-up of cans of Pepsi soda.
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Pepsi Pioneered the Use of 2-Liter Bottles

While it may seem like 2-liter soda bottles have been around forever, they were first designed by PepsiCo in 1970. The idea was the brainchild of John Sculley, a Pepsi marketing vice president at the time and the future CEO of Apple. In 1970, Pepsi was running a distant second in the soft drink market, and Sculley was tasked with designing a new bottle to compete with Coca-Cola’s iconic “contour” bottle. Instead of creating a comparably tiny single-serve bottle, Sculley created the largest bottle he could in an effort to get more of the brand’s product to Pepsi’s customers.

Sculley was so successful in this endeavor that he even sold the new bottle to Walmart, a store that had previously refused to sell soda for fear that the bottles broke too easily. While meeting with Walmart founder Sam Walton, Sculley “accidentally” dropped the plastic bottle on the floor to prove its durability, convincing Walton to carry the product.

Bottles of reformulated "100% Natural" 7-Up soda.
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7Up Once Contained Mood Stabilizers

While it’s somewhat common knowledge that early versions of Coca-Cola contained cocaine, it wasn’t the only soda to contain unusual and potentially harmful ingredients. In fact, 7Up’s formula used to contain prescription mood stabilizers upon its launch in 1929 — specifically, a drug known as lithium citrate, which is used in modern times to treat conditions such as bipolar disorder.

At the time of 7Up’s inception, the soda was called “Bib-Label Lithiated Lemon-Lime Soda,” which was descriptive of the product’s actual ingredients at the time, even though it doesn’t quite roll off the tongue. Though the product’s name was later shortened to 7Up in 1936, it wasn’t until 1948 that lithium citrate was deemed potentially harmful and removed from the recipe after the U.S. Food and Drug Administration outlawed the use of the chemical in sodas.

Pouring cola from a bottle into a glass.
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Different U.S. Regions Call Soft Drinks “Soda,” “Pop,” or Even “Coke”

Americans are passionate about the words they use to refer to their soft drinks, and different U.S. regions have their own monikers for the sugary beverages. On the West Coast, in New England, and in pockets of the Midwest, you’re more likely to hear the drink referred to as “soda.” But throughout the majority of the rest of the Midwest, as well as the Pacific Northwest, “pop” is a more commonly used term. Things get confusing in the South, as Southerners use the word “coke” to refer to all soft drinks in general, even if they have nothing to do with the Coca-Cola brand. This may have something to do with the fact that “coke” stems from Coca-Cola having been founded in Atlanta, with Southerners proving loyal to their local brand.

There are a few hyper-regional terms for these drinks, too. Some 6% of Americans — the majority of whom can be found in Louisiana and North Carolina — use the phrase “soft drink” even in a casual context. In parts of the Deep South, “cocola” is more commonplace, whereas older Americans in the Boston area call the drinks “tonic.”

Many red lids and one yellow plastic cap with coca cola logo close up.
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Coca-Cola’s Yellow Cap Signifies That It’s Kosher for Passover

While most plastic bottles of Coca-Cola boast a red cap that matches their usual color scheme, in the spring you may notice bottles with yellow caps appearing on shelves. That yellow cap signifies that the drink is kosher for the Jewish holiday of Passover. Prior to 1935, Coke wasn’t kosher at all, but that year the company swapped out beef-tallow glycerin for a vegetable counterpart that made the drinks both kosher and vegan. In 1980, however, Coke began using high fructose corn syrup instead of cane sugar, making the beverage non-kosher for Passover according to Jewish dietary laws. In order to remedy the situation, Coca-Cola now produces a special yellow-capped bottle each year that signifies the high fructose corn syrup has been swapped out for a sucrose sugar substitute, thus making this version of Coke kosher for Passover.

Special Edition Christmas Diet Coke can.
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Coca-Cola Ads Helped Popularize Santa Claus’ Modern-Day Likeness

Coke has a surprising connection to Santa Claus. In 1931, Coca-Cola hired illustrator Haddon Sundblom to paint Santa Claus for a series of holiday advertisements. Using friend and retired salesman Lou Prentiss as a model, Sundblom produced a version of Santa that depicted the jolly, bearded man with rosy cheeks that we all recognize today. Sundblom would continue painting Santa for Coke’s advertisements until 1964.

While the character of Santa Claus predated Coke, of course, he had been depicted in a variety of ways, ranging from tall and thin to looking like an elf. An 1862 drawing of Santa Claus by Thomas Nast for Harper’s Weekly portrayed Santa as a tiny figure compared to the booming presence he is today, though Nast would also be the first to draw Santa wearing a red jacket, and some other Nast drawings showed a version of Santa that resembles the jolly man we now know. Yet all in all, it wasn’t until Coca-Cola debuted its holiday advertisements that Americans began to fully associate Santa Claus with the large, jovial figure we know him as today.

Bennett Kleinman
Staff Writer

Bennett Kleinman is a New York City-based staff writer for Optimism Media, 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.

Original photo by frankpeters/ iStock

New York City is one of the great metropolises of world history, rivaling the cultural and architectural splendor of ancient Rome, medieval Constantinople, Victorian London, and interwar Paris. Yet New York is also ever-changing, leaving behind little evidence of its fascinating Indigenous, Dutch, British colonial, and early American history. These facts explore the centuries-long story of New York and spotlight some of its most amazing modern attributes.

A view of NYC construction in the 19th century.
Credit: Science & Society Picture Library via Getty Images

The Indigenous Lenape Called the Area “Manahatta,” or “Hilly Island”

The original inhabitants of the island nestled between the East and Hudson rivers were the Lenape, who referred to their home island as “Manahatta,” meaning “hilly island.” Before the arrival of Europeans, Manahatta was filled with natural resources nestled within an estuary, an area where ocean salt water mixes with river-fed fresh water. The story goes that the Lenape, which means “the people” in their Algonquin-based language, “sold” the island to the Dutch for 60 guilders or around $24. However, because the Lenape had no concept of land ownership, they likely saw the transaction as an opportunity to share the land with the Dutch and not as a purchase price. Today, the history of the Lenape can still be found in various spots throughout the city. Broadway, for example, was actually an old Lenape trade route (renamed “BredeStraat” by the Dutch in the 1620s), and Pearl Street in lower Manhattan is named after the glistening discarded seashells tossed aside by the Lenape so many centuries ago.

The city of New York, with Castle Williams and Governors Island.
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New York Was Once Called “New Orange”

When the Dutch controlled the island of Manhattan (1624 to 1664), the city was known as New Amsterdam, until English King Charles II decided he wanted to snatch up New Netherland — of which New Amsterdam was a part — to capitalize on the growing fur trade. However, in 1673 Dutch forces briefly retook the island.

Instead of reverting back to the old name, the Dutch decided on “New Orange,” in honor of William of Orange (Orange was once a medieval principality in the Netherlands, though it is now a part of southern France). Although the English retook the city within a year and reinstated the name “New York,” in a strange twist of fate, William of Orange became king of England following the Glorious Revolution some 15 years later.

Aerial view of Manhattan looking south over Central Park.
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Central Park Is the Most-Filmed Location in the World

According to a 2022 survey, Central Park is the most-filmed location in the world — and it’s not even close. Having appeared in some 352 films (with the first being Romeo and Juliet in 1908), Central Park was featured in 116 more movies than second-place finisher Bronson Canyon, located in Los Angeles’ Griffith Park. It’s worth noting that this number doesn’t even include television shows, which would likely make Central Park even more of an outlier. Despite its glitzy Hollywood treatment (and being flanked by some of the city’s most expensive apartments), Central Park is only the fifth-largest park in New York City, with the largest being Pelham Bay Park in the Bronx.

Old City Hall in New York City.
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New York Was the First Capital of the U.S. After the Constitution

Although Washington, D.C., bears the name of the nation’s first President, George Washington actually served the first 16 months of his presidency in New York City. On April 30, 1789, Washington took the oath of office at Federal Hall, and lived at 3 Cherry Street (demolished in 1856) before moving to the Macomb House at 39 Broadway (demolished in 1940). The third presidential mansion was the President’s House (only partially demolished), located in Philadelphia, only a short stroll away from Independence Hall.

Although Washington’s time in New York City was brief, the famous Virginian general accomplished a lot there. While in the city, Washington established revenue sources for the new government; created the State, Treasury, and War departments; and filled the entire Supreme Court.

View of the Brooklyn Bridge and the New York skyline.
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Brooklyn Bridge Was the Longest Bridge in the World Upon Its Completion

One of the most stunning aspects of the New York City skyline is the Brooklyn Bridge. Architect John Roebling designed the 1.1-mile-long bridge, but died from tetanus just as the project was beginning construction. His son, Washington, took over the construction, but soon developed decompression disease while working long hours under the river, so construction management fell to his wife, Emily Roebling, who served as an onsite liaison between her husband and the work crews.

After 14 long years, the Brooklyn Bridge was completed in 1883, finally threading together the cities of New York and Brooklyn. At that time, it had the longest main span of any bridge in the world. Yet the bridge relinquished the crown only seven years later, following the completion of the Forth Bridge in Scotland. That doesn’t diminish its status as one of the biggest engineering achievements of the 19th century, though; today, the Brooklyn Bridge is designated as a U.S. National Historic Landmark.

New York City Manhattan midtown aerial panorama view.
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Many of New York’s Skyscrapers Have Their Own ZIP Code

Because the U.S. Postal Service assigns ZIP codes based on population density and mail volume, many of New York City’s tallest buildings have their own ZIP code. The Empire State Building, for example, is home to more than 1,000 businesses, and has its own ZIP code: 10118. Other buildings with their own ZIP code include 30 Rockefeller Center, the Metlife Building, the Chrysler Building, and 40 or so others located mostly throughout midtown Manhattan. New York isn’t the only city that benefits from this exclusive ZIP code practice: Dodger Stadium in Los Angeles, Willis Tower in Chicago, and even the White House all have their own ZIP codes.

New York City subway entrance sign.
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New York Didn’t Become Five Boroughs Until 1898

For the majority of the city’s history, the name New York City was synonymous with the island of Manhattan, while today’s boroughs — the Bronx, Queens, Brooklyn, and Staten Island — were cities (or a patchwork of cities) in their own right. The annexing of the boroughs began in earnest in the late 19th century, with the most populous borough, Brooklyn, putting up the most resistance to consolidation. At the time, Brooklyn was considered the fourth-largest city in the U.S., and Brooklynites created banners, speeches, and even songs in protest of joining Greater New York City. A nonbinding referendum held in December 1894 passed in Brooklyn by the narrowest of margins, with 50.1% in favor of annexation. For some living in the outer boroughs, the subsequent establishment of modern New York City four years later became known as “The Great Mistake of 1898.” However, New York City is almost unimaginable without its boroughs, as Brooklyn’s population swelled the city’s numbers, Queens became the most diverse county in the world, and the Bronx evolved into the epicenter of the hip-hop revolution (not to mention the home of the New York Yankees).

Darren Orf
Writer

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.

Original photo by Album/ Alamy Stock Photo

For a show about nothing, it sure was something. The NBC sitcom Seinfeld charmed viewers for 180 episodes throughout nine seasons from 1989 to 1998 by leaning into the banal realities of the everyday. During its run, Seinfeld averaged a staggering 30 million viewers each week, with more than 76 million people tuning into the finale.

The brainchild of comedian Jerry Seinfeld and writer-producer Larry David, the original idea was to create a 90-minute special meant to air in Saturday Night Live’s time slot. But as the two got to work, they realized that was a long time to sustain their idea about a show about a comedian, so it turned into a half-hour sitcom.

“​​The pitch for the show, the real pitch, when Larry and I went to NBC in 1988, was we want to show how a comedian gets his material,” Seinfeld said in a Reddit AMA in 2014. “The show about nothing was just a joke in an episode many years later, and Larry and I to this day are surprised that it caught on as a way that people describe the show, because to us it’s the opposite of that.”

However it’s described, much of the lovability of the show rests in its strong characters — Seinfeld playing a fictionalized version of himself, Julia Louis-Dreyfus as his sarcastic ex Elaine Benes, Jason Alexander as his insecure best friend George Castanza, and Michael Richards as his oddball neighbor Cosmo Kramer.

Here, we look back at 10 facts about the groundbreaking sitcom.

"Seinfeld" co-creator Larry David and actress Julia Louis-Dreyfus.
Credit: David Hume Kennerly/ Archive Photos via Getty Images

Elaine Wasn’t in the Pilot Episode

The first episode was missing a significant part of the famous foursome: Elaine. However, there was another female character: a waitress named Claire who worked at the diner where Jerry and George would hang out.

Even with Claire in the pilot, it’s widely reported that Elaine came to be because the first episode was “too male-centric.” While Rosie O’Donnell, Patricia Heaton, and Megan Mullaley were all considered for the part, it was Louis-Dreyfus’ close ties to David during their joint time at Saturday Night Live that led to the gig. When David came to her with the Seinfeld character, Louis-Dreyfus was “immediately intrigued” by the writing. “It was unlike anything on television at the time,” she said.

"Kramer" holds a script of the final episode in the air amongst a sea of cast and crew members.
Credit:David Hume Kennerly/ Archive Photos via Getty Images

Kramer’s Name Was Originally “Kessler”

In season four, during the whole show-within-a-show plot, there’s a storyline in which Kramer will only let himself be depicted if he can play himself. As it turns out, that was based on a real situation that Seinfeld dealt with at the start of the show.

The comedian had based the wacky character of his real neighbor Kenny Kramer, who would only let him use his name if he could play himself. So in the pilot episode, Richards’ character is referred to as “Kessler.” After it was worked out — and the real Kramer was paid $1,000 — the name was switched.

The Cast of Seinfeld.
Credit: David Turnley/ Corbis Historical via Getty Images

The Theme Song for Each Episode Is Different

For the first seven seasons, every episode started with Seinfield doing a stand-up routine. But what only eagle-eared listeners will notice is that the theme song was made to match those monologues, which means every single episode had a slightly different one. Composer Jonathan Wolff used instruments like the bass — plus his fingers and mouth to improvise the sounds — and synced them to Seinfeld’s stand-up timing to build a simple melody that could easily start and stop for jokes.

“I have no idea how many themes we did for Seinfeld…” he told Great Big Story. “The timing, the length, had to be adjustable in a way it would still hold water and still sound like the Seinfeld theme.”

View of English actress Helena Bonham Carter.
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Elaine’s Hair Was Inspired by Helena Bonham Carter

Elaine’s curls were one of her most distinctive features, and Louis-Dreyfus had gotten the idea from an unusual place: Helena Bonham Carter in the 1985 film A Room with a View. “I thought it was incredibly beautiful, and it was,” Louis-Dreyfus said. “I thought, that’s how I’m going to do my hair, it’s so incredible. That’s where that thing came from, the big wall of hair. And it kept growing and growing.”

Frank gets into character on Broadway on the Upper West Side of NYC.
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Jerry Stiller Wasn’t Always George’s Dad

So much of George’s character is enveloped by his parents, played by Estelle Harris and Jerry Stiller, but Stiller wasn’t the elder Constanza from the start. In the first appearance of the character in season four, he was played by veteran TV, film and theater actor John Randolph. While Alexander says he adored Randolph, he thought that “John actually looked more like my grandfather than my father.”

After one episode, they moved on to a second actor who “wasn’t noteworthy” before Stiller officially came along in season five. “He’s my favorite character on the show,” Alexander said. “He doesn’t even know how good he is.” He added that Stiller often had trouble remembering his lines, but that worked out for the best. “The lines would come back to him in little stutter steps, so they would come out in little stutter steps — what you were seeing was his own growing anxiety and frustration with his own memory that got translated into the disdain for the world that Frank Constanza had.”

The Original Soup Kitchen in New York City.
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The Soup Nazi May Not Have Been a “Seinfeld” Fan

With everyday life so often inspiring the storylines, one of the most famous was the Soup Nazi who insisted his customers order in a very particular way or else “no soup for you!” Spike Feresten, who wrote the episode, had often visited Al Yeganeh’s soup shop, now called The Original Soupman, on 55th Street in New York City and experienced the stern service himself.

“He was kind of a mean guy, but on that day he said, ‘No soup for you!’” Feresten said. “I was so bewildered, like, ‘What? I don’t understand, I’ve got money, you’re selling stuff.’” It made for perfect comedy fodder.

But Yeganeh was not a fan of the depiction, telling CNN the use of the word was a “disgrace to the human race.” That said, he eventually used the sitcom’s success to draw visitors to his restaurant, even including its hashtag in the store’s Instagram bio.

Julia Louis-Dreyfus and Jerry Seinfeld.
Credit: David Turnley/ Corbis Historical via Getty Images

Louis-Dreyfus Practiced Elaine’s Dance in a Mirror

In the season 8 episode “The Little Kicks,” it was simply written that Elaine had really bad dance moves — but Louis-Dreyfus did her homework. “The night before the table read, I had the script and frankly I just stood in front of a mirror and tried to do movements that looked really bad,” she said. “People approach me about the dance all the time.” Her response: No way.

The cast and crew of the hit television show "Seinfeld" pose on set during the last days of filming.
Credit: David Hume Kennerly/ Archive Photos via Getty Images

The First and Last Conversations Between Jerry and George in the Series Were the Same

In a full-circle moment, the first scene of the series started in a coffee shop with Jerry telling George that a button on his shirt was too high and that it “makes or breaks” the shirt since it’s in “no man’s land.” And in the very last scene of the finale, when they’re all sitting in a jail cell, he alludes to it again, saying: “The second button is the key button. It literally makes or breaks the shirt.”

As the camera pans back, George says, “Haven’t we had this conversation before?” to which Jerry ends the series with “Maybe we have.”

DC Jerry Seinfeld donates "Puffy shirt" to Smithsonian American History Museum.
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The Puffy Shirt Is in the Smithsonian

The most memorable wardrobe item from the sitcom is no doubt the ruffled shirt that Jerry agreed to wear during a Today show appearance that Kramer said “looks better than anything you own.”

Now that memorable item is part of the Smithsonian National Museum of American History collection, though it wasn’t the first item that was offered. “The producers offered Jerry’s apartment refrigerator covered with magnets,” museum curator Dwight Blocker Bowers said. “We realized that this was too ungainly an object for the museum to accommodate. We countered with the puffy shirt because it is a costume representative of the show and of its leading player.”

The cast of Seinfeld.
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The Four Stars Made the Decision to End the Show

The show’s mark on pop culture remained strong throughout its run, but it was the cast who knew it was time to wrap things up. Seinfeld called his three costars into his dressing room during season nine and they just looked at one another and knew.

“We’ve had a lot of good fortune here. Maybe we shouldn’t push our luck too far,” he said. “And we all agreed that this was the right moment. And I remember it’s the only time we all got together in a dressing room, the four of us, to make that decision. That was powerful.”

It’s a decision Seinfeld doesn’t regret, recalling when a cab driver once asked him why they ended on top. “I said to him, well, I was at a point we had done it for nine years and I realized I could go off the air right now and the show could be a legend,” he said. “I could be a legend of the sitcom world or I could make some more money.” And that’s why the show remains a legend.

Interesting Facts
Editorial

Interesting Facts writers have been seen in Popular Mechanics, Mental Floss, A+E Networks, and more. They’re fascinated by history, science, food, culture, and the world around them.

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Most of us can recall at least one teacher who made the classroom fun, inspired a love for learning, and provided sincere encouragement. While these wonderful educators are remembered by those who benefited from their lessons, they are often unheralded in the bigger picture. After all, the best teachers tend to keep the focus on their students, rather than themselves.

Nevertheless, the legacies of some teachers have endured through time thanks to their groundbreaking contributions to the classroom — and beyond. Here are nine who truly deserved every apple placed on their desks.

The Greek philosopher Socrates (469 - 399 BC) teaches his doctrines to the young Athenians.
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Socrates

Cutting a distinct figure in fifth century BCE Athens with his unkempt clothing and long hair, Socrates conducted his “classes” in the marketplace and other public areas by engaging passersby in discussions designed to winnow out the truths of existence from popular wisdom and ingrained assumptions. Ironically, he claimed he wasn’t a teacher during his trial for corrupting the minds of Athenian youth, though that may have been part of what was ultimately a failed attempt to stave off execution. Socrates is remembered today as a towering figure in the formation of Western philosophy, while his “Socratic method” survives as a proven tool for fostering debate in the classroom. His method also lived on in his most famous student: Plato.

A portrait of Helen Keller's teacher, Anne Sullivan.
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Anne Sullivan

Rendered partially blind by disease and orphaned at an early age, Anne Sullivan had already faced numerous challenges by the time she agreed to teach a 6-year-old deaf and blind girl named Helen Keller. Sullivan famously penetrated her student’s shell by holding one of Keller’s hands under running water and tracing the word “water” on the other, commencing a series of accomplishments that remain awe-inspiring more than a century later. With Sullivan — who is often referred to as the “Miracle Worker” — at her side, Keller went on to publish an autobiography in 1903, graduate from Radcliffe College in 1904, and embark on a career as a world-famous humanitarian. As Bishop James E. Freeman eulogized at Sullivan’s funeral in 1936, “The touch of her hand did more than illuminate the pathway of a clouded mind; it literally emancipated a soul.”

Portrait of William Holmes McGuffey, famed McGuffey Reader originator.
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William Holmes McGuffey

William Holmes McGuffey served as a professor and college president at several schools from the late 1820s into the early 1870s. But his greatest contribution to academia came with McGuffey’s Eclectic Readers, the first textbooks to enjoy widespread use as the common school system found its footing in a rapidly developing nation. Expanding to a series of six books after the first two volumes appeared in 1836, the Readers progressed from the basics of the alphabet to advanced lessons in literacy, science, and history, eventually selling more than 100 million copies by 1900. McGuffey’s Bible-based works largely disappeared from classrooms within a few decades, though they remain in print for those with a homeschool curriculum in mind.

American educationalist and pioneer for equal education opportunities for women, Emma Willard.
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Emma Willard

Born in Connecticut in 1787, Emma Willard saw her intellectual curiosity fostered by the progressive men in her life. Her father enrolled her at a local girls’ school, and a nephew later provided instruction from his college geometry and philosophy courses. Willard sought to pass along similar educational opportunities to other girls, starting with the launch of the Middlebury Female Seminary from her Vermont home in 1814. Seven years later, she opened the Troy Female Seminary, the nation’s first higher-education institution for women, in upstate New York. Willard stepped away from its day-to-day management in 1838, but the school, which opened with 61 boarding and 29 day students, continued its steady growth. By 1872, more than 12,000 students had passed through its doors. Now known as the Emma Willard School, it retains the lofty goals of its founder as one of the elite girls’ college preparatory schools in the country.

Rare photo of Mahatma Jyoti Rao Phule teaching her wife Savitribai Phule.
Credit: Raj surve/ Shutterstock

Savitribai Phule

Like Willard, India’s Savitribai Phule was fortunate to find others willing to nurture what was a gifted, ambitious mind. Married at age 9, she learned to read and write from her husband, Jyotirao Phule, before pursuing a formal education that made her India’s first female teacher. Phule teamed with her husband to open a rare school for girls in 1848 — a move that ignited controversy in a country with strict societal codes but also garnered accolades from the British government. Although she eventually opened 18 schools, Phule’s accomplishments as an educator form just one component of her outsized legacy. She also famously set up support systems for India’s “untouchables,” child brides, widows, and abused women as part of efforts to spark widespread social reform.

Maria Montessori and a child in class.
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Maria Montessori

Already a distinct figure as one of Italy’s first female physicians, Maria Montessori channeled her interest in childhood development into the launch of a daycare center in Rome in early 1907. She subsequently fine-tuned the “Montessori method,” in which kids essentially learn subjects for themselves through immersion in preferred activities and adult guidance. Her schools spread to Europe and then the United States in 1911, before falling out of favor across the Atlantic by the 1920s. Montessori nevertheless continued writing and lecturing until she died in 1952, shortly before American educators began rediscovering the benefits of her methodology. Today, there are approximately 20,000 Montessori schools worldwide, with Google co-founders Larry Page and Sergey Brin and former Amazon chief Jeff Bezos among the accomplished alumni.

Close-up of Kumon pencils.
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Toru Kumon

Amid a steady career as a high school math teacher in Osaka, Japan, Toru Kumon discovered that his young son was struggling to keep pace in his own math class. Kumon subsequently designed a series of worksheets for his son and, upon seeing notable improvement, began instructing other children around the city. In 1968, he retired from teaching to focus on his burgeoning educational service, which hit American shores in 1974. Unlike some of the other educators on this list, Kumon left little room for improvisation in a system that stressed the importance of rote memorization for his carefully detailed worksheets. But his Kumon Centers topped a total of 2 million enrolled students around the world before his death in 1995.

Photo of Dr. James Naismith.
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James Naismith

The first full-time athletics instructor at McGill University in Montreal, Canada, James Naismith went on to spend four decades as a professor, coach, and athletic director at the University of Kansas. Of course, he’s best known for his stint at the Springfield, Massachusetts YMCA International Training College in the early 1890s, during which time he was asked to develop a winter activity for the students. Naismith devised a game in which two teams of players scored points by lofting a ball into peach baskets fastened at opposite ends of the gym. His “basket ball” quickly caught on to the point where college teams were competing against one another by the mid-1890s, en route to expanding into a global sport with an estimated 450 million participants by the early 21st century.

Math teacher Jaime Escalante assists a student.
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Jaime Escalante

A Bolivian immigrant who had to rebuild his educational credentials from scratch, Jaime Escalante wound up teaching remedial math at Garfield High in East Los Angeles in the mid-1970s. Unwilling to accept the low expectations the school placed on their students, Escalante launched an advanced placement (AP) calculus course in 1979, and alternately pushed, cajoled, and charmed his troubled students into becoming college-ready scholars. In an incident dramatized in the 1988 movie Stand and Deliver, all 18 of Escalante’s students passed the AP calculus exam in 1982. However, many of the students made similar errors, which the Educational Testing Services assumed was them cheating. Eventually, the students were allowed to retake the difficult exam and again passed. By the time the famed teacher left Garfield High in 1991, a whopping 600 students at the once-underperforming school had accepted the challenge to take AP courses across a wide range of subjects.

Tim Ott
Writer

Tim Ott has written for sites including Biography.com, History.com, and MLB.com, and is known to delude himself into thinking he can craft a marketable screenplay.

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Porcupines are largely known for one defining characteristic that tends to keep humans and predators at a safe distance. But while their famous quills are something to be feared, these animals as a whole are not. Indeed, like the neighbor or co-worker whose intimidating tattoos belie a sweet disposition, porcupines have proved to be compelling animals to watch and study for those who dare to get a closer look. Here are nine facts to further prick your interest in these delightfully bizarre rodents.

Indian crested porcupine (Hystrix indica).
Credit: Michal Ninger/ Shutterstock

Porcupines are classified into one of two families. New World porcupines, which live in North, Central, and South America, are primarily arboreal herbivores. Old World porcupines, native to Europe, Asia, and Africa, are largely terrestrial and sometimes also consume meat. The two families have additional differences when it comes to physiological features such as quill density; Old World species showcase clusters of these stiff hairs, while their New World counterparts sport single quills interspersed with fur. Although the two families share a name and common characteristics, they are not considered to be closely related.

North American porcupine on a branch.
Credit: miroslav_1/ iStock

Only One New World Porcupine Species Lacks a Prehensile Tail

Most New World porcupines enjoy the benefits of a prehensile tail, which helps these tree-climbing mammals grip branches as they scamper above forest floors. The lone New World species forced to survive without such assistance is the common North American porcupine, which, as the largest and heaviest member of the family, probably could use the extra help for balance. The lack of a prehensile tail doesn’t dissuade them from climbing trees, although it does occasionally result in an unlucky creature taking a tumble. Fortunately, this species sports something of a natural antibiotic on its quills, which keeps infections at bay should the animal impale itself after a long fall.

Stand alone porcupine quills.
Credit: DFabri/ Shutterstock

Porcupines Cannot “Shoot” Their Quills

Some porcupine species boast up to 30,000 quills, which typically lie flat across most of the body but spring to attention when their owner feels threatened. Contrary to popular belief, porcupines cannot “shoot” their quills; they simply shed old ones, with new ones constantly growing at a rate of 1 millimeter every two days until fully developed. Although they’re not poisonous, the quills of New World porcupines are especially dangerous because of barbed tips that flare open amid the warmth and moisture of a wound.

View of a weasel fisher in the wild.
Credit: critterbiz/ Shutterstock

Porcupines Face Their Greatest Predatory Threat From a Member of the Weasel Family

Although the porcupine boasts an intense defense against predators such as bears, wolves, lynx, and eagles, it tends to have its paws full when confronted by a fisher. A forest-dwelling member of the weasel family, the fisher is far more agile than the lumbering porcupine but about the same height; capable of dodging the swipe of a thorny tail, it moves fast enough to attack a porcupine’s face, and can upend its opponent to go after an unprotected belly. The fisher is also a skilled tree climber, and as such can either launch an airborne attack from a branch, or force its slow-footed prey to the disadvantageous terrain of the ground.

White porcupine in the zoo.
Credit: seagames50 images/ Shutterstock

Porcupines Crave Salt

Visitors to porcupine-populated areas may be surprised to find the sides of a house or car damaged by bite marks. This is partly due to ever-growing porcupine incisors, which — like those belonging to all rodents — require constant nibbling for maintenance. However, porcupines in particular possess a dire need for salt following a winter of subsisting on low-nutrient bark and a spring spent chowing down on high-potassium leaves, grass, and flowers. That means they’ll gnaw not only on human sweat-stained tools like canoe handles, but also on house paneling treated with salt-infused paints and stains, as well as tires that bear traces of contact with winter road salt.

Close-up of a Porcupine.
Credit: tratong/ Shutterstock

They Make Sounds Ranging From Shrieking to Mumbling

Visitors to porcupine-populated areas may be startled by the range of sounds emitted by these nocturnal animals, starting with the unsettling nighttime whining of an individual calling out to a mate. Porcupines also shriek when in distress, and will hiss or chatter their teeth when confronting danger. During calmer times, a mother may communicate with her baby by way of wailing and grunting, while companions exchange friendly clicking noises. Meanwhile, a solitary porcupine may simply mumble to itself as it ambles along.

Two porcupines together.
Credit: JensKlingebiel/ iStock

Females Are Fertile for a Short Period of Time

Porcupine mating is a delicate process, and it’s not just because of the sharp quills in close proximity to nether regions. Fertile for only an eight-to-12-hour window, a female North American porcupine will mark her territory with urine and other secretions to arouse the interest of suitors, who then engage in often brutal battles for mating rights. After an alpha male has vanquished his rivals, he may still have to wait a few days for the opportunity to consummate their relationship. When the female finally signals her readiness, the male showers her with more urine before moving in for his long-awaited reward.

porcupine family including a baby.
Credit: Awei/ Shutterstock

New World Species Usually Produce Just One Baby at a Time

Following a drawn-out courtship period and seven months of gestation, New World porcupines typically give birth to just one baby per year (Old Worlders may produce two to four per litter). Although prehensile species reveal no sexual dimorphism at a young age, prompting handlers to seek gender clarification from DNA testing, these porcupettes are otherwise built to quickly get up to speed. Born with their eyes open, babies experience the hardening of their soft quills within an hour, and are capable of supplementing mama’s milk with vegetation after two weeks. Fully weaned after three to four months, porcupines are ready to head into the wilderness on their own some six months after arriving in the world.

Adorable young porcupine eats some fruits and veggies in captivity.
Credit: Lisa5201/ iStock

Porcupines Can Be Kept as Pets

In a world home to people who attempt to domesticate wildcats and giant snakes, it shouldn’t come as a surprise that some adventurous owners also keep porcupines as pets. On the plus side, these animals are largely docile and subsist on easily acquired food. On the other hand, they can be expensive — one dealer sells individuals for as much as $3,000 — and they require at least 15 to 20 square feet of space in which to roam. But even people with the money and means to support these animals can be impeded by the long arm of the law, as several states have made porcupines illegal to own.

Interesting Facts
Editorial

Interesting Facts writers have been seen in Popular Mechanics, Mental Floss, A+E Networks, and more. They’re fascinated by history, science, food, culture, and the world around them.

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The Vice Presidency has long been a contentious position — on the one hand, the people who have held the office have been a heartbeat away from the presidency (and eight succeeded to Commander-in-Chief because of the President's death). On the other, many have maligned the job since day one: "My country has in its wisdom contrived for me the most insignificant office that ever the invention of man contrived or his imagination conceived," John Adams once said.

Regardless, the role of Vice President is important, and many of those who have held the title are far lesser known. Here are 10 interesting facts — like who wrote a hit pop song and whose grandson coined the term "veep" — about America's Vice Presidents.

Portrait of Thomas Jefferson one of the American presidents.
Credit: Print Collector/ Hulton Archive via Getty Images

Thomas Jefferson — VP to President John Adams

While in England in 1786 on diplomatic business, Thomas Jefferson visited the birthplace and home of one of his idols: William Shakespeare. He was joined by John Adams, who was then the U.S. ambassador to Britain. The pair weren’t particularly impressed when they got to Stratford-Upon-Avon — Adams called it "small and mean," and Jefferson was appalled by the costs, noting each amount paid ("for seeing house where Shakespeare was born, 1 shilling; seeing his tomb, 1 shilling; entertainment, 4 shillings …").

But the two Founding Fathers did partake in a custom of the time: They cut off a bit of an old wooden chair that was reportedly Shakespeare's own as a souvenir. Some 220 years later, the chip was displayed at Jefferson's Monticello home, along with a wry note he'd written: "A chip cut from an armed chair in the chimney corner in Shakespeare's house at Stratford on Avon said to be the identical chair in which he usually sat. If true like the relics of the saints it must miraculously reproduce itself."

Portrait of Elbridge Gerry.
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Elbridge Gerry — VP to President James Madison

Elbridge Gerry’s political chicanery as the governor of Massachusetts was so legendary, he gave his name to the practice of redistricting with political aims: gerrymandering.

The word was coined after Gerry’s party drew some absurd state Senate districts in order to elect more Democratic-Republicans, at the expense of their rival party, the Federalists. Redistricting with political aims wasn’t a new practice, but this was a particularly brazen example — one district resembled a salamander — and after Gerry signed off on the bill, critics dubbed it a "gerry-mander."

 Portrait of 8th United States President Martin Van Buren.
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Martin Van Buren — VP to President Andrew Jackson

Van Buren was a politico of many nicknames: Friends called him the Little Magician thanks to both his stature — he stood about 5 feet 6 inches tall — and his cunning strategy as a politician, and his enemies called him the Fox, for the same reason. After the financial panic of 1837 while he was President, he won a nickname that helped doom his career: Critics called him Martin Van Ruin.

Official portrait of President John Tyler.
Credit: GraphicaArtis/ Archive Photos via Getty Images

John Tyler — VP to President William Henry Harrison

John Tyler became the first Vice President to assume the presidency when William Henry Harrison died after a month in office. Some opposed his assumption of the office by arguing that the Constitution only gave him the duties and powers of the President, not the presidency itself. (Former President John Quincy Adams complained that Tyler was "in direct violation both of the grammar and context of the Constitution.")

Tyler ignored them — even when his party expelled him — and went about enacting his agenda and finishing Harrison's term as President. Post-presidency, he purchased a plantation in Virginia and renamed it Sherwood Forest (after Robin Hood's famed forest), because he reportedly saw himself as a political outlaw.

Adlai Stevenson, a former Democratic Presidential candidate.
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Adlai Stevenson — VP to President Grover Cleveland

Both Adlai Stevenson I and a grandson who shared his name a half-century later ran for President unsuccessfully during their careers.

But as Vice President, the elder Stevenson came the closest to actually assuming the office, albeit unwittingly. In 1893, President Grover Cleveland had a dangerous surgery in secret — on a yacht — to remove a cancerous mouth tumor and part of his jaw.

Charles G. Dawes, the 30th Vice President of the United States.
Credit: FPG/ Archive Photos via Getty Images

Charles G. Dawes — VP to President Calvin Coolidge

Charles Dawes is the only Vice President (so far) who has written a No. 1 pop song. A self-taught pianist, he wrote a tune called "Melody in A Major" in 1911. Lyrics were added in 1951 and the song was renamed "It's All in the Game," but it wasn’t until 1958 when a version of the song sung by Tommy Edwards rose to No. 1 on the Billboard Hot 100 chart in the U.S. and on Britain's singles chart. Eventually, the song would be covered by artists including Isaac Hayes, Elton John, and Barry Manilow.

Republican politician Charles Curtis at a railroad station in Chicago, Illinois.
Credit: Chicago History Museum/ Archive Photos via Getty Images

Charles Curtis — VP to President Herbert Hoover

Charles Curtis is the highest-ranking Native American to ever serve in the federal government. Born in the Kansas Territory in 1860, Curtis was three-eighths Native American and spoke French and Kansa, the language of the Kaw people, before he spoke English.  

Alben Barkley, politician from Kentucky and running mate of President Harry S. Truman.
Credit: Irving Haberman/IH Images/ Archive Photos via Getty Images

Alben W. Barkley — VP to President Harry S. Truman

If you’ve ever called a Vice President "veep," you have Alben Barkley's grandson to thank: The Vice President told reporters once that his young grandson had suggested he be referred to as "Veep" instead of the clunkier "Mr. Vice President." While his successor, Richard Nixon, declined to be called by the same nickname, it has become common vernacular for referencing the office and position.

American politician US Vice President Nelson Rockefeller.
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Nelson A. Rockefeller — VP to President Gerald Ford

Nelson Rockefeller liked his co-op apartment at 810 Fifth Avenue in New York City so much that he expanded it up, down, and to the side. During his first marriage, he bought the floors above and below him and grew the home to a 30-room triplex. After divorcing his first wife, the couple split the triplex — he took the bottom floor and she kept the top two. Later, he bought an apartment next door, joining it with his portion of the triplex. He and his second wife reportedly stuck to the next-door elevator, to keep their distance from the first Mrs. Rockefeller. The former Vice President died in 1979, just months before Richard Nixon bought an apartment on the same block.

Oath of office to Vice President Kamala Harris during the 59th Presidential Inauguration.
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Kamala Harris — VP to President Joe Biden

The 49th Vice President has a name filled with symbolism. Her mother, Shyamala, named her after a Sanskrit term for the lotus flower, which has a powerful meaning in Indian culture. Kamalā is also another name for a Hindu goddess of wealth and good fortune better known as Lakshmi. Kamala's middle name, "Devi," is a general term for a Hindu goddess in Sanskrit.

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Interesting Facts writers have been seen in Popular Mechanics, Mental Floss, A+E Networks, and more. They’re fascinated by history, science, food, culture, and the world around them.

Interesting Facts

From castles, cathedrals, and palaces to miles-long bridges, golden temples, and sky-scraping glass towers, the world is full of magnificent feats of architectural engineering. While the purpose of most of these structures is known, there are still plenty of human-made monuments that boggle the minds of even the most acclaimed scientists and archaeologists. Here are 11 such monuments that remain a mystery.

Original photo by Stephanie LeBlanc/ Unsplash

Aerial view of the famous Carnac stones.
Credit: Alla Khananashvili/ Shutterstock

Carnac Stones (France)

The Carnac Stones are a group of more than 3,000 megalithic standing stones in the French village of Carnac, Brittany. These stones date back to the Neolithic period and were probably erected between 3300 and 4500 BCE. They are one of the world’s largest collections of menhirs — upright stones arranged by humans. There is no real evidence to confirm their purpose, but that hasn’t stopped researchers from hazarding guesses. Some theorize they were used as calendars and observatories by farmers and priests. According to Christian mythology, the stones are pagan soldiers who were petrified by Pope Cornelius. Local folklore, meanwhile, says that the stones stand in straight lines because they were once part of a Roman army. The story goes on to say that the Arthurian wizard Merlin turned the Romans to stone.

Moais in Rapa Nui National Park on the slopes of Rano Raruku volcano on Easter Island, Chile.
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Easter Island Moai (Chile)

Over 2,000 miles off the coast of Chile, Easter Island (Isla de Pascua) is the one-time home of a Polynesian people called the Rapa Nui. Scattered across the island are around 1,000 moai, giant hand-carved stone statues of human-like figures that are half-buried in the earth. The Rapa Nui landed on the island sometime between 700 and 800 CE, and are believed to have started making the moai around 1100 CE. Each moai weighs 14 tons and stands 13 feet tall on average, so it’s hard to imagine how they were transported and hauled into place. One theory is that the islanders used a system of ropes and tree trunks. Their purpose has also been the subject of much debate. To the Rapa Nui, the statues may have stored sacred spirits.

Aerial view of Nazca ancient mysterious geoglyph lines.
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Nazca Lines (Peru)

Southern Peru’s Nazca Desert is covered with hundreds of geometric designs. These ancient geoglyphs range from simple shapes to plants and animals such as a hummingbird, monkey, llama, and whale. The Nazca Lines date back to around 200 to 700 CE, when the Nazca people who lived in the region created them. Researchers have struggled to agree upon the purpose of these giant works of art, particularly since they are best seen from the surrounding hills and by plane. Among many theories are astronomical maps, indicators of sacred routes, and water troughs. An alternative take is that they were created to be observed by deities from the sky.

Precolumbian Chiefdom Settlements with Stone Spheres of the Diquís.
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Stone Spheres (Costa Rica)

In Costa Rica’s Diquis Delta is a group of around 300 polished stone spheres, some just a few inches in diameter and others measuring up to seven feet and weighing 16 tons. Employees of the United Fruit Company stumbled across the spheres in the 1930s while clearing a jungle to build a banana plantation. Scientists have so far been unable to pinpoint an exact date of their origin, instead suggesting that they appeared sometime between 200 BCE and the 16th century CE. They are commonly attributed to the Diquis people, yet their purpose is a mystery. They might have been property markers of ancient chiefs, and some even think they may be remnants of the lost city of Atlantis. Some of the spheres were even detonated in the hope of finding gold inside.

Baalbek Ancient city temple in Lebanon.
Credit: Baishev/ Shutterstock

Temple of Bacchus (Lebanon)

The Baalbek temple complex in northeast Lebanon is one of the most intriguing Roman ruins on the planet. Its centerpiece is the well-preserved and monumental Temple of Bacchus. The age of the temple is unknown, although it was most likely erected in the second century CE. Most historians agree that emperor Antoninus Pius commissioned it in honor of Bacchus, the god of wine and intoxication. What has been baffling archaeologists ever since the temple’s rediscovery in the late 19th century is how the Romans succeeded in building it. It is staggering to think that humans without heavy machinery could hoist the 42 Corinthian columns (19 of which remain standing) of the colonnade, since each stands 62 feet tall and 7.5 feet in diameter.

A front view of the Mnajdra Megalithic Temple Ruins.
Credit: Creative Credit/ iStock

Hagar Qim (Malta)

Located on the Mediterranean island of Malta, the UNESCO World Heritage Site of Hagar Qim is one of seven prehistoric temples in Malta and is believed to date to between 3800 BCE and 2200 BCE. The site’s name translates to “standing stones,” and one of the largest weighs in at more than 20 tons, measuring nearly 23 feet in height. The site was first excavated in 1839 and consists of a series of rooms lined by these megaliths. Parts of the chamber align with the sunrise and sunset of the summer solstice. This and the other temples on the island all appear to have been built in the same period, which has left archaeologists puzzled — there is little evidence of any civilization capable of such building feats on the islands at that time.

Göbeklitepe temple in Şanlıurfa, Turkey.
Credit: Mehmet Nisanci/ iStock

Göbekli Tepe (Turkey)

Could a set of ruins in southeastern Turkey be remnants of the world’s first temple? That’s one of the key questions archaeologists ponder as they explore Göbleki Tepe, a series of huge stone pillars that are some 6,000 years older than Stonehenge. Now a UNESCO World Heritage Site, the landmark was ignored for centuries, dismissed as little more than a cemetery. In the mid-1990s, excavations began and experts soon realized it was a treasure trove of history. The pillars weigh as much as 10 tons each and create massive stone circles. Radar surveys of the area indicate a number of additional circles are still buried underground. Göbleki Tepe is older than writing and older than agriculture. But who were the Neolithic people who built this, and how and why did they do it?

Diver examining the sandstone structure of the Yonaguni undersea monument.
Credit: Nature Picture Library/ Alamy Stock Photo

Yonaguni Monument (Japan)

Experts are divided as to whether the underwater rocks near Japan’s Yonaguni Island are a human-made structure or naturally occurring. In the 1980s, divers discovered what appears to be a rectangular monument, measuring 165 feet long and 65 feet wide. Some scholars believe that it is the remains of a pyramid, perhaps from a long-lost submerged city belonging to an ancient civilization. Meanwhile, others insist the rocks have been shaped by millennia of the ocean’s currents. Similarly, while some argue that markings on the rock’s surface are proof of ancient human involvement, others say they are simply scratches. For the time being, the Japanese government seems to agree with the latter and does not recognize the Yonaguni Monument as culturally significant.

Main Tower & Wall at Great Zimbabwe.
Credit: Lynn Yeh/ Shutterstock

Great Zimbabwe Ruins (Zimbabwe)

The Great Zimbabwe Ruins are the largest ruins in sub-Saharan Africa. This medieval city was once a trading hub and possibly the capital of the Queen of Sheba’s realm. The remains consist of the Great Enclosure (perhaps a royal residence), the Hill Complex (possibly the religious heart of the city), and the Valley Ruins (houses which suggest the city once had a population of 20,000 people). In total, the Great Zimbabwe Ruins extend across an area of 200 acres. The city is thought to have been abandoned in the 15th century, for reasons scientists aren’t sure of.

Ruins of Palenque in Yucatán, Mexico.
Credit: Maximilian Wenzel/ Shutterstock

Palenque (Mexico)

The Maya people of what is now Mexico were incredibly advanced when it came to writing, building, and knowledge of astronomy. Yet scientists still know little about other parts of their culture. By the time Spanish conquistadors arrived from Europe, the Maya civilization had already fallen, and historians still debate the cause. Some of the finest Maya ruins are at Palenque, in the Mexican state of Chiapas, an elaborate complex that includes a palace and several temples. Thought to have been constructed between 500 and 700 CE, it features plaster carvings and decorations that are still remarkably well-preserved. The city at Palenque is a marvel of design but remains shrouded in mystery since we may never know why it was abandoned around 900 CE.

A view of the Stonehenge rocks in England.
Credit: Stephanie LeBlanc/ Unsplash

Stonehenge (England)

No list of mysterious sites would be complete without the Neolithic monument at Stonehenge, which is known worldwide and continues to mystify visitors. The enormous stones are estimated to have been placed between 2500 BCE and 2200 BCE. Hundreds of even older burial mounds have also been uncovered in the surrounding area. Some of the stones come from several hundred miles away in Wales, leading archaeologists to speculate how they were transported. Others are from nearer parts of Wiltshire. What was Stonehenge’s purpose? Many believe it was a spiritual site, and people still flock to it as the sun rises on the summer solstice, when sunlight rises above the Heel stone at Stonehenge and falls directly onto the middle of the circle.

Interesting Facts
Editorial

Interesting Facts writers have been seen in Popular Mechanics, Mental Floss, A+E Networks, and more. They’re fascinated by history, science, food, culture, and the world around them.