Original photo by PictureLux / The Hollywood Archive/ Alamy Stock Photo

If you’re ever looking for a counterexample to F. Scott Fitzgerald’s famous claim that “there are no second acts in American lives,” look no further than Shirley Temple. The beloved child star, who was Hollywood’s No. 1 box-office draw from 1935 to 1938, announced her retirement from film at the age of 22 in 1950. It was anyone’s guess what Temple would do next, but it’s unlikely that many predicted her eventual diplomatic career. After she ran (unsuccessfully) for Congress in 1967, President Nixon appointed her as a delegate to the 24th United Nations General Assembly in 1969, and President Ford named her the ambassador to Ghana in 1974.

Shirley Temple almost played Dorothy in “The Wizard of Oz.”

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Temple wasn’t just a huge fan of Frank L. Baum’s novel — she was also in the running to play the lead in the 1939 film adaptation. The role went to Judy Garland, a decision that Temple accepted graciously, writing in her 1988 autobiography “Child Star” that “sometimes the gods know best.”

Temple’s foreign service didn’t end there. In 1989, just before the Velvet Revolution, President George H.W. Bush made her ambassador to the former Czechoslovakia, a post she held until 1992, as the country became a parliamentary democracy. According to Norman Eisen, who held the same role from 2011 to 2014, the “sunny confidence and optimism” that made Temple a movie star also helped her “really infuse the United States’ role — as our representative here, in the Velvet Revolution — with that good cheer and that hope.”

Numbers Don't Lie

Numbers Don't Lie

Number of Temple’s feature-film appearances
43
Ingredients in a Shirley Temple (soda, ice, grenadine, maraschino cherries)
4
Curls in Temple’s iconic hairdo
56
Year Temple received a star on the Hollywood Walk of Fame
1960

Shirley Temple’s final film was “______.”

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Shirley Temple’s final film was “A Kiss for Corliss.”

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Shirley Temple is the youngest Oscar honoree in history.

From 1935 to 1961, the board of governors of the Academy of Motion Picture Arts and Sciences sometimes bestowed the Academy Juvenile Award on performers under the age of 18 in recognition of their “outstanding contribution[s] to screen entertainment.” The first honoree was none other than Shirley Temple, who was just 6 years old at the time. To this day, she remains the youngest person to win an Oscar. Her award was specifically for her work in 1934, including the films Stand Up and Cheer!, Bright Eyes, Baby Take a Bow, and Little Miss Marker. Overall, the Juvenile Award was given to 12 performers, including a 16-year-old Judy Garland in 1939 — the year she starred in The Wizard of Oz.

Michael Nordine
Staff Writer

Michael Nordine is a writer and editor living in Denver. A native Angeleno, he has two cats and wishes he had more.

Original photo by franckreporter/ iStock

Canada has a population of just over 40 million people, the vast majority of whom live within 100 miles of the U.S. border. Only 10% of Canadians live farther north, with all of the country’s most populous cities — namely Toronto, Montreal, Calgary, Ottawa, and Edmonton — nestled relatively close to their American neighbors. The reason for this population density is largely pragmatic: Being significantly colder and more rugged, the rest of Canada simply isn’t as conducive to agricultural production or significant settlement.

The U.S.-Canada border is the longest international border in the world.

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Beating such competitors as Kazakhstan-Russia, Argentina-Chile, and China-Mongolia, the U.S.-Canada border is indeed the world’s longest. The shortest is a 443-foot boundary in the Zambezi River between Botswana and Zambia, though the border has never been formally recognized.

In addition to its 10 provinces, Canada also has three territories — Yukon, the Northwest Territories, and Nunavut — which are geographically vast but home to a combined population of just 128,000 people. Together the territories make up Northern Canada, which geographers generally don’t consider part of the country’s ecumene — a term for land that’s been permanently settled. The most populous city in the territories is Whitehorse, the capital of Yukon, which is home to 45,000 people and in 2013 was named the city with the least air pollution in the world by the Guinness Book of World Records. By contrast, Toronto — Canada’s most populous city overall — is home to 3 million people.

Numbers Don't Lie

Numbers Don't Lie

Length (in miles) of the U.S.-Canada border
5,525
U.S. states that border Canada
13
Canada’s ranking among the world’s most densely populated countries
228
Year Canada was founded, on July 1 (as the Dominion of Canada)
1867

In Canada, a one-dollar coin is called a ______.

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In Canada, a one-dollar coin is called a loonie.

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Canada is home to the world’s northernmost settlement.

There’s cold, and then there’s the North Pole. Just 508 miles from that famed landmark is a military installation on Ellesmere Island named Alert, Nunavut, which is the northernmost permanently inhabited place in the world. With average temperatures ranging from -26 degrees Fahrenheit in January to a comparatively balmy 38.1 degrees in July, it has a permanent population just under 200 — one of whom is tasked with keeping polar bears away.

Michael Nordine
Staff Writer

Michael Nordine is a writer and editor living in Denver. A native Angeleno, he has two cats and wishes he had more.

Original photo by Irina Tiumentseva/ iStock

World War II ran on rubber. From tanks to jeeps to combat boots, the Allied Forces needed an uninterrupted flow of rubber to supply fresh troops and vehicles to the front lines. Then, in late 1941, Japan invaded Southeast Asia — a key supplier of America’s rubber — and what was once a plentiful resource quickly became scarce. Americans pitched in, donating household rubber (think old raincoats and hoses) to help the war effort, but it wasn’t enough. So scientists set to work finding an alternative. A pair working separately at Dow Corning and General Electric independently developed a silicone oil/boric acid mixture that appeared promising. It was easily manipulated and could even bounce on walls, but in the end its properties weren’t similar enough to rubber to be useful in the war.

The microwave is a WWII invention.

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Radar using microwaves was a key Allied technology in WWII. But it wasn’t until 1946, a year after Germany’s defeat, that engineer Perry Spencer noticed a magnetron tube he was working on had melted candy in his pocket. Thirty years later, the microwave was in 60% of U.S. homes.

U.S. government labs eventually found a workable rubber substitute using petroleum, but the previously developed “nutty putty” stuck around until it fell into the hands of advertising consultant Peter Hodgson. Sensing an opportunity, Hodgson bought manufacturing rights, renamed it “Silly Putty,” and stuck some of it inside plastic eggs just in time for Easter 1950. But it wasn’t until Silly Putty’s mention in an issue of The New Yorker later that year that sales exploded, with Hodgson eventually selling millions of this strange, non-Newtonian fluid (fluids whose viscosity changes under stress; ketchup and toothpaste are other examples). Since then, Silly Putty has found various serious uses, from teaching geology to physical therapy, and even took a ride on Apollo 8 in 1968, when it was used to keep the astronauts’ tools secure. A pretty impressive résumé for a substance that was initially considered a failure. 

Numbers Don't Lie

Numbers Don't Lie

Retail price of Silly Putty in 1950
$1
Year Crayola acquired exclusive manufacturing rights to Silly Putty
1977
Amount (in pounds) of latex one rubber tree produces per year
19
Atomic number of boron (boric acid is a form of boron)
5

The first people to use rubber were the ______, a civilization of Mexico whose name means “rubber people.”

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The first people to use rubber were the Olmecs, a civilization of Mexico whose name means “rubber people.”

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Daylight saving time was first instituted to ration energy during wartime.

On March 19, 1918, the Standard Time Act was signed into law, establishing the five time zones of the U.S. along with instituting daylight saving time, a method designed to conserve energy during World War I. But after the war, the energy-saving portion of the act was repealed and states were once again permitted to create their own standard time. Fast-forward to February 1942, only three months after the Japanese attack on Pearl Harbor, and Congress once again instigated a year-round daylight saving time, nicknamed “war time.” The time zones were even renamed to “Eastern War Time,” “Pacific War Time,” etc. At the war’s end in 1945, states once again regained the right to set their standard time, until 1966 when Congress passed the Uniform Time Act.

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 Allstar Picture Library Ltd/ Alamy Stock Photo

The Wizard of Oz featured more than 600 actors, some of whom were bigger stars than others. Near the top of that list was a cairn terrier appropriately named Terry. The pup who played Dorothy’s loyal companion Toto — and who, unlike the character she portrayed, was female in real life — received a weekly salary of $125 for her work on the perennial classic, which was more than many of her co-stars (including all the actors playing Munchkins, who were paid $50 a week). At about $2,885 in today’s money, the pup’s pay was also 10 times the minimum wage at the time.

“Over the Rainbow” was nearly cut from the film.

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Studio executives felt the now-classic song slowed the movie down, prompting associate producer Arthur Freed to give an ultimatum: “The song stays — or I go.” Evidently, his demand worked.

Terry had already appeared in seven films — Ready for Love, Bright Eyes, The Dark Angel, Fury, The Buccaneer, Barefoot Boy, and Stablemates — prior to 1939’s Oz, which helps explain her salary. She also performed her own stunts, which resulted in an injury when one of the Munchkin actors stepped on her paw. 

The pup was out of action for two weeks, during which time Judy Garland helped nurse her back to health. The actress was so smitten with her canine co-star that she attempted to buy her from Carl Spitz, her owner and trainer, but he refused.

Numbers Don't Lie

Numbers Don't Lie

Feature-length film appearances by Terry
22
Oscars won by “The Wizard of Oz,” out of five nominations
2
“Wizard of Oz” books written by L. Frank Baum
14
Dogs MGM auditioned for Toto per week before finding Terry
~100

“Wizard of Oz” director Victor Fleming also directed 1939’s “______.”

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“Wizard of Oz” director Victor Fleming also directed 1939’s “Gone With the Wind.”

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Toto is replaced by a cow in one theatrical Oz adaptation.

The Wonderful Wizard of Oz was hugely successful upon its publication in 1900, and a number of adaptations quickly followed. In addition to the several silent and animated films that preceded the 1939 classic movie, the book was initially adapted for the stage — with several changes. In the theatrical version, the Wicked Witch of the West is only ever mentioned by name, and Toto is replaced by a cow named Imogene.

Baum, who wrote the play himself, thought a cow would make for a bigger in-person spectacle. The play also marked the introduction of Dorothy’s last name, “Gale,” as well as the first time the word “Wonderful” was dropped from the story’s title. Both Toto and Imogene appear in the first film adaptation of the story, which was made in 1910 and runs just 13 minutes.

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.

Original photo by mkurtbas/ iStock

Some species of trees that line city streets predate the dinosaurs by millions of years, but when it comes to the truly ancient, you need to look to the oceans. Sea-dwelling creatures have a many-millions-of-years head start on any terrestrial life-forms. Take, for instance, the shark: This apex predator of the sea has been stalking the world’s oceans for upwards of 450 million years. Meanwhile, the very first forests filled with Earth’s very first trees, in the genera Wattieza and Archaeopteris, likely didn’t sprout on land until the mid-Devonian period some 385 million years ago. However, it’s worth noting that the animals some scientists consider the first “sharks” likely didn’t look like the magnificent predators of today. First appearing in the Late Ordovician, these creatures sported sharklike scales, but likely didn’t yet possess the species’ most memorable trait — a terrifying set of teeth.

Sharks are the oldest living species still in our oceans today.

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Sharks are old, but the world’s oceans are home to some truly ancient species. Jellyfish, for example, are thought to be at least 500 million years old, and scientists have found fossils of dendrogramma — a mushroom-like deep-sea animal — that are 560 million years old.

Surviving that long as a species is no easy feat. Only a few million years after the shark’s appearance on the world stage, these proto-sharks (along with the rest of life on Earth) suffered through the Late Ordovician mass extinction. This event was the first of five major extinction events in Earth’s history, and sharks survived them all; not even trees can add such an impressive accolade to their resume. So the next time you cross paths with a shark, whether behind the glass of an aquarium or on screen in the act of devouring the residents of Amity Island, don’t forget to marvel at this amazing animal’s incredible story of survival. 

Numbers Don't Lie

Numbers Don't Lie

Average size (in inches) of the dwarf lantern shark, the smallest shark in the world
7.9
Number of shark species the International Union for Conservation of Nature lists as endangered or threatened
143
Year “Jaws” was released
1975
Rough odds of being attacked by a shark in the U.S.
1:5 million

The ______ geologic period some 359 million years ago is known as the “golden age of sharks.”

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The Carboniferous geologic period some 359 million years ago is known as the “golden age of sharks.”

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Marine biologists age sharks in a manner similar to how arborists age trees.

Arborists use a technique called dendrochronology, or counting tree rings, to estimate a tree’s age. Every year, trees put on new growth near their bark, which over time forms predictable concentric circles — a timeline of their lives. In a strange biological plot twist, sharks do much the same thing. Similar to a tree’s trunk, sharks also put down new layers of material on their vertebrae. Unlike the bony bits that form our spine, a shark’s vertebrae are made out of cartilage (in fact, sharks don’t have any bones at all). Although counting the cartilage layers is helpful in getting a snapshot of a particular shark’s life, these layers can be affected by many things, including food shortages and health; plus, older sharks seem to stop putting on new rings entirely. That means counting these vertebrae rings only provides a ballpark estimate of a shark’s timeline. For some species of shark, including the incredibly long-lived Greenland shark, scientists use carbon dating of the proteins embedded in the shark’s eyes from birth to capture a more accurate age.

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 Viorel Poparcea/ iStock

Just .17% of the global population — around 1 in 600 people — has red hair and blue eyes, making this pairing the rarest natural combination of hair and eye color. Each trait on its own is already unusual: Only 2% of the population has red hair and around 8% to 10% has blue eyes. Both traits are recessive, meaning a person must inherit the relevant gene variant from each parent for the trait to appear.

All babies are born with blue eyes.

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While many babies of European ancestry are born with blue or gray eyes that may darken over time, babies of African, Asian, and Hispanic descent are often born with brown eyes that stay brown.

Red hair is primarily caused by variants of the MC1R gene on chromosome 16. Those variants lead to greater production of the red pigment pheomelanin over the darker eumelanin, resulting in red hair, lighter skin, and often freckles as well. Blue eyes are influenced by several genes, the most important being OCA2 and a regulatory region of the HERC2 gene on chromosome 15. Variants in those genes reduce melanin in the iris, resulting in blue eye color.

Because they’re generally recessive, the traits can be passed down through generations before appearing in an offspring with the right genetic combination. This genetic alignment is more likely in people of Northern European ancestry, particularly in regions such as Ireland and Scotland.

Numbers Don't Lie

Numbers Don't Lie

Estimated percentage of the Irish population with natural red hair (the highest in the world)
10%
Year scientists identified the MC1R gene as the primary gene responsible for red hair
1995
Genes that can influence eye color
16
Average number of strands of hair among redheads (fewer than among people with other hair colors)
90,000

Many redheads are sensitive to ______ because the MC1R gene variant also affects how people perceive pain.

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Many redheads are sensitive to cold because the MC1R gene variant also affects how people perceive pain.

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Elizabeth Taylor probably didn’t have violet eyes.

Actress Elizabeth Taylor was known for her striking eyes, which were often described as violet. While her natural eye color was more likely a deep blue, she enhanced the violet effect with purple-toned makeup, clothing, and careful lighting in films and photos, creating the illusion of a rare purple hue. She even extended the theme to her personal brand, naming one of her perfumes “Violet Eyes” to play up the mystique of her legendary gaze.

True purple eyes are extremely rare, though blue eyes can sometimes appear violet under certain lighting conditions. In very rare cases, people with forms of albinism may have violet eyes due to minimal pigment combined with visible blood vessels. But Taylor’s unforgettable eyes weren’t the result of a genetic mutation — it was the combination of her natural blue eyes, deliberate styling, and savvy branding that made them iconic.

Kristina Wright
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Kristina is a coffee-fueled writer living happily ever after with her family in the suburbs of Richmond, Virginia.

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A sea otter’s fur is an evolutionary marvel. Within just 1 square inch, otter fur contains 850,000 to 1 million hairs, making it denser than that of any other mammal on land or in the sea. The aptly named fur seal comes in a distant second, with only about 300,000 hairs per square inch. Humans, meanwhile, have only about 80,000 to 120,000 hairs on our heads (if we’re lucky).

Sea otters are the only marine mammals that habitually use stone tools.

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When floating on their backs, otters will use rocks balanced on their stomachs to crack open shells. They have also been spotted smacking shells on rocks or driftwood strewn along the Pacific coast. They’ve even been known to use garbage as tools.

But the number of hairs per square inch is only one aspect of sea otters’ complex, luxurious coat, because their fur has two distinct layers. The outer fur is called guard hair, which protects the second layer, or the undercoat, from getting wet. This double-layer system, and the tiny barbs on the guard hair, trap air next to an otter’s skin, which helps them withstand chilly waters without the blubber found in other aquatic animals such as walruses, whales, and seals. However, their fascinating fur has historically made otters a target, especially during the fur trade of the 18th and 19th centuries. Sea otters are also vulnerable to oil spills, which effectively destroy the insulating abilities of their fur. Since the 1970s, sea otters have slowly recuperated from near-extinction in the U.S. (at one point, California’s population was only 50 — it’s now 3,000), but they still have a long way to go before reaching their former abundance. 

Numbers Don't Lie

Numbers Don't Lie

Number of otter species worldwide (two live in the U.S. — the sea otter and the North American river otter)
13
Amount a sea otter eats compared to its weight every day
25%
Depth (in feet) that sea otters dive when searching for prey
330
Year the ​​North Pacific Fur Seal Treaty protected sea otters from commercial hunting
1911

Sea otters are a ______, meaning they play a vital role in holding their ecosystem together.

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Sea otters are a keystone species, meaning they play a vital role in holding their ecosystem together.

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90% of all sea otters in the world live along the coastal shores of Alaska.

Before Europeans arrived in the western United States, sea otters numbered in the hundreds of thousands. Their native range stretched from Mexico’s Baja California to the coastal waters of Japan, following the horseshoe-shaped path of the Pacific Rim (which includes California, Oregon, Washington, Alaska, and Russia). Since then, the sea otter hasn’t had an easy go of it, for the reasons mentioned above. Today, sea otters in the U.S. are split into two main groups. Southern sea otters call central and Southern California home, whereas northern sea otters — representing 90% of all sea otters in the world — live along Alaska’s coast. Scientists and environmentalists are still hard at work reintroducing sea otters to the rest of their once-sprawling coastal domain.

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 yul38885/ Shutterstock

As beloved as the crisp fall weather seems to be, English speakers haven’t always paid attention to it … at least not linguistically. Historically, the more extreme seasons have always been named — specifically winter, which was so important that it was used to mark the passage of time by the Anglo-Saxons, who counted their years in winters. But when English speakers of the past referred to summer’s end, they often used the term “harvest,” from the Old English (and ultimately Germanic) haerfest. The first recorded usage of “harvest” to mean a season appears in the 10th century, but the word didn’t stick around in common usage (it was considered outdated by the 1700s). It could be that it was just too confusing a term, considering it was used for both the time of year and the task of plucking crops from trees and fields.

There are two different first days of fall.

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There are two ways to welcome autumn: meteorological fall and astronomical fall. Used by climate scientists, meteorological fall starts September 1, a consistent date for tracking weather. Astronomical fall is based on the equinox, alternating each year between September 22 and 23.

Eventually, the English language began recognizing the transitional seasons. Spring was first known as “lent” or “lenten” in the 12th and 13th centuries, then “spryngyng time,” among other terms, around the 14th century. “Autumn” emerged around the 1300s, taken from the Latin autumnus and French autompne, and slowly pushing out “harvest.” “Fall” cropped up around the 1500s as part of “fall of the leaf,” mirroring the popular phrase “spring of the leaf” used for the vernal equinox, and it’s likely that these phrases were simply shortened to give the seasons their modern names. “Autumn” and “fall” have been used interchangeably ever since, with their popularity waxing and waning over time, though English speakers today primarily use one or the other based on their homeland. “Autumn” reigns supreme in the U.K., while most Americans typically use “fall.” The vocabulary variation harkens back to the Revolutionary period, when disgruntled colonists attempted to split both governmentally and culturally from the British, in part by modifying their speech. Less than 100 years after the U.S. declared independence, “fall” was considered an entirely American word, used in a young country that would go on to establish its own season-defining traditions, such as trick-or-treating and Thanksgiving dinners.

Numbers Don't Lie

Numbers Don't Lie

Year folk-rock legend Neil Young debuted “Harvest,” his fourth studio album
1972
Year “pumpkin spice” was added to the Merriam-Webster dictionary
2022
Pounds of pumpkins harvested in Illinois (the top-producing state) in 2020
564 million
Number of days in fall, the second-shortest season of the year (after winter)
89

In Latin, “equinox” means “______.”

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In Latin, “equinox” means “equal night.”

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The first English dictionary had only 3,000 words.

Dictionaries were once popular graduation gifts and required purchases for college students, but the first English-only compendium wasn’t nearly as large as modern tomes. Lexicographer Robert Cawdrey’s Table Alphabeticall, published in 1604, featured around 3,000 words with brief descriptions of their meanings on 130 pages — and unlike more recent dictionaries, it didn’t contain commonly used words. Instead, Cawdrey’s text listed difficult, unusual words that had crept into English thanks to a wave of literary, scientific, and artistic advances during the 1500s. (Many, like “ocean” or “hazard,” we wouldn’t think of as particularly challenging today.) Table Alphabeticall’s limited focus is often why its historical significance is overshadowed by Samuel Johnson’s A Dictionary of the English Language — an important language contribution that attempted to standardize the spelling of everyday words for the first time, but didn’t go to press until 1775.

Nicole Garner Meeker
Writer

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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There are some things in modern culture that people just love to hate, like Nickelback, cargo pants, and the most derided typeface of all: Comic Sans. At first glance, this fun and childlike font — originally designed to mimic the script found in comic books — seems to serve a lighthearted purpose. But for more than a decade, it’s been derided as one of the worst typefaces ever. It turns out that Comic Sans doesn’t even hold a particularly warm and fuzzy place in its own creator’s heart — typographer Vincent Connare only used the font once in his life, in a letter complaining to his broadband internet provider. 

The word “italics” comes from the Latin word for Italy.

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An italic typeface was introduced by Venetian printer Aldus Manutius in 1501. Manutius first used this slanted type in a printing of the works of Virgil, which he dedicated to Italy. Hence, the word “italics.”

Connare originally created the font for Microsoft Bob, a short-lived operating system designed to make computers more user-friendly. The desktop resembled a family room with icons representing certain computer programs. When someone clicked on a pen and paper icon, for example, it opened a word processor. Users were assisted by a cartoon dog named Rover, and during the software’s development, Connare decided that dogs “don’t talk in Times New Roman” — so he created Comic Sans. Although the final version of Microsoft Bob didn’t include the font, it appeared as an additional typeface in Windows 95.

Yet Comic Sans slowly garnered derision in the years following its initial release, and was often perceived as overly childish, visually chaotic, and an affront to good typeface design. Hate for the typeface drove reliable traffic on Twitter (now called X), inspired entire websites, and even prompted one vitriolic manifesto — but maybe times are changing. One reformed Comic Sans hater (and co-author of the aforementioned manifesto) changed his Facebook group “Ban Comic Sans” into “Use Comic Sans” in May 2019, telling The New York Times, “It’s gotten to be so bad that it’s almost cool again.”

Numbers Don't Lie

Numbers Don't Lie

Number of comics and graphic novels sold in the U.S. in 2021
94 million
Year Swiss typographer Max Miedinger designed Helvetica, one of the most widely used fonts
1957
Signatures in one “Ban Comic Sans” petition
5,000
Year Microsoft introduced the assistant Clippy, an anthropomorphic paper clip inspired by Microsoft Bob
1997

The use of the word “sans” means the typeface is without ______.

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The use of the word “sans” means the typeface is without serifs.

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Movable type was invented in China — not Germany.

The invention of the printed word is often inexorably linked with 15th-century German printer Johannes Gutenberg and his press, but the first evidence of movable type — arranging separate letters on metal pieces — predates the Teutonic inventor by several centuries. Although the first printed (or at least not handwritten) books date back to the ninth century, the invention of movable type arrived in 11th-century China, as the creation of artisan and engineer Bi Sheng (970 to 1051 CE). To create this early printing press, Sheng hand-carved letters into clay and then baked them into reusable bricks. During the Nan (Southern) Song dynasty, which stretched from 1127 to 1279, these printed books helped create a scholar class in Chinese society, and the size of book collections became entwined with a person’s social status.

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 Bogomil Mihaylov/ Unsplash

Few people have had a larger or more positive impact on the way we drive than William Phelps Eno, sometimes called the “father of traffic safety.” The New York City native — who invented the stop sign around the dawn of the 20th century — once traced the inspiration for his career to a horse-drawn-carriage traffic jam he experienced as a child in Manhattan in 1867: “There were only about a dozen horses and carriages involved, and all that was needed was a little order to keep the traffic moving,” he later wrote. “Yet nobody knew exactly what to do; neither the drivers nor the police knew anything about the control of traffic.” 

Stop signs were invented before traffic lights.

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The first traffic signal (then gaslit) was installed in London in 1868. The stop sign, meanwhile, debuted in Detroit in 1915.

After his father’s death in 1898 left him with a multimillion-dollar inheritance, Eno devoted himself to creating a field that didn’t otherwise exist: traffic management. He developed the first traffic plans for New York, Paris, and London. In 1921, he founded the Washington, D.C.-based Eno Center for Transportation, a research foundation on multimodal transportation issues that still exists. One thing Eno didn’t do, however, is learn how to drive. Perhaps because he had such extensive knowledge of them, Eno distrusted automobiles and preferred riding horses. He died in Connecticut at the age of 86 in 1945 having never driven a car.

Numbers Don't Lie

Numbers Don't Lie

Hours an average American driver spends at stoplights every year
58.6
Minimum height (in feet) of stop sign poles in rural areas (7 feet in other areas)
5
Registered cars in the United States as of 2019
276 million
Size (in feet) of the first stop sign
2 x 2

Stop signs were originally colored ______.

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Stop signs were originally colored yellow.

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Stop signs have eight sides to indicate danger.

Though the first stop sign was a humble square, that design didn’t last long. In addition to being easily recognizable from both sides and easy to see at night, the octagon was chosen in the 1920s as part of a still-influential initiative in which the number of sides a sign has indicates the level of danger it’s meant to warn against. Train crossing signs were circles (which can be thought of as having an infinite number of sides) because those crossings were considered the most hazardous, followed by octagonal stop signs for intersections and the like; diamond-shaped signs were used for less perilous crossings, and rectangular ones were posted simply to convey information.

Michael Nordine
Staff Writer

Michael Nordine is a writer and editor living in Denver. A native Angeleno, he has two cats and wishes he had more.