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Australia’s geographic isolation has given rise to some of the world’s most extraordinary and unique creatures. Having been separated from other landmasses for around 30 million years, the continent is home to wildlife found nowhere else on Earth. And the country’s diverse landscapes, from arid deserts to tropical rainforests, have resulted in remarkable adaptations that shaped the evolution of its many strange and wonderful species. 

Around 400 mammal species are found in Australia, and about 90% of its terrestrial mammals live nowhere else on the planet. According to some reports (exact numbers differ between studies), as many as 70% of birds and nearly 90% of reptiles are also endemic to the country. This extraordinary level of endemism makes the continent a treasure trove of biodiversity and a testament to the power of evolutionary isolation. 

Some of Australia’s unique animals have become iconic and are almost synonymous with the country itself, such as kangaroos, koalas, wombats, and platypuses. Here, we look at some of the lesser-known animals you’ll only find in Australia, from thorny devils to pygmy possums and numbats. 

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Thorny Devil 

The marvelously named thorny devil is one of the most spectacular lizards in the world. It owes its striking appearance to the sharp spines that cover its entire body, giving it the look of a particularly fearsome dragon — albeit one that’s only about 8 inches long. 

The thorny devil specializes in eating ants, anywhere from 600 to 2,500 per meal. It also has one of the most unusual drinking methods in the animal kingdom: These little devils can drink by standing in puddles and absorbing water through skin capillary channels between the overlapping scales that lead the water to their mouths. 

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Tasmanian Pygmy Possum

Australia is home to 23 possum species. The most widespread of these primarily nocturnal, tree-dwelling mammals are the common brushtail possum and common ringtail possum, which can grow to lengths of 23 inches and 14 inches, respectively. At the other end of the size spectrum, we have the appropriately named Tasmanian pygmy possum, also known as the little pygmy possum. These miniscule creatures inhabit the forests, heathlands, and alpine regions of Australia. At just 2 inches to 4.7 inches in length and a weight of about 7 grams, they’re also the smallest possums on Earth. 

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Superb Lyrebird 

The superb lyrebird — one of the world’s largest songbirds — looks something like a large brown pheasant. Adult males possess a distinctively ornate tail, with special curved feathers that assume the shape of a lyre when unfurled for their elaborate courtship displays. 

This musical connotation also applies to the lyrebird’s incredible vocal abilities. They communicate through a complex array of calls and noises, around 80% of which consist of expert mimicry. Along with their territorial whistles and cackling notes, they can imitate almost anything in their environment, including chainsaws, car engines, alarms, camera shutters, and dog barks, as well as the songs and calls of other local birds. 

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Tasmanian Devil

Tasmanian devils are stocky, carnivorous marsupials that in some ways resemble baby bears. They are the largest carnivorous marsupials in the world, often reaching around 30 inches in length and weighing up to 26 pounds. They also have one of the most powerful bites of any mammal, which aids in their voracious — and often ferocious — feeding habits, a defining attribute shared by the Looney Tunes cartoon character of the same name. 

Tasmanian devils were once found throughout Australia but are now found only on the island state of Tasmania. Their extinction on the mainland may have occurred around 400 years ago with the introduction of East Asian dogs (the possible ancestors of Australia’s dingoes).

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Turtle Frog

Australia is home to many endemic frog species, from the tiny, black-and-yellow southern corroboree frog to the peculiar sunset frog that’s found exclusively in peat swamps near Walpole, Western Australia. But one particular frog found only in Australia merits a special mention, due in large part to its bizarre appearance. 

The turtle frog has an extremely small and narrow head, short and stocky limbs, and a round body, giving it the appearance of a tiny turtle with its shell removed. When it comes to reproducing, turtle frogs skip the tadpole phase altogether; all development takes place entirely inside the egg before the tiny newborn frogs emerge. 

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Numbat 

The numbat is a beautiful little marsupial that looks somewhat like a more elaborate squirrel. Unlike most of Australia’s marsupials, numbats are diurnal (active during the day). Their distinctive striped fur helps camouflage them against the woodland floor to protect them from predators such as birds of prey, snakes, and goannas.

Numbats feed almost exclusively on termites, eating between 15,000 and 20,000 each day. Their sensitive noses can detect termites underground, which the numbats can then extract using their long, narrow, and sticky tongues. A numbat’s tongue measures, on average, about 4 inches long — an impressive length considering the animal’s body (minus the tail) is only about 8 inches to 10 inches long.

Tony Dunnell
Writer

Tony is an English writer of nonfiction and fiction living on the edge of the Amazon jungle.

Original photo by LightField Studios/ Shutterstock

The Rorschach test is one of psychology’s most recognizable assessment tools. Created by Swiss psychiatrist Hermann Rorschach in 1921, it became a standard method of psychological testing by the 1960s. Through the use of inkblots and a person’s response to them, it can be used to assess cognition and personality as well as to diagnose certain psychological conditions. 

Fundamentally, the test relies on a phenomenon called pareidolia, a psychological process that causes people to see familiar patterns in a random stimulus — for example, seeing a face in the clouds or the image of Jesus on a slice of toast. Having responded to the 10 main inkblots, a patient’s responses are then analyzed for their content — for example, they may have seen animal figures, human features, natural phenomenon, or images of a sexual nature — and five triggering aspects known as determinants: form, movement, pairs and reflections, color, and shading. Psychologists then compare their scores against the Rorschach test’s normative sample, revealing any outlying responses.

Rorschach died a year after the publication of his studies on the inkblot test, but his methods were later widely adopted and are still in use today — despite a certain amount of controversy. Many psychologists believe the Rorschach test has no psychometric credibility and is now obsolete, partly because the interpretation of the test results can be highly subjective. 

Here are six little-known facts about the Rorschach test, from its surprising conception to its enduring place in popular culture.

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Rorschach’s Childhood Nickname Was “Inkblot”

Hermann Rorschach’s father was an art teacher, and Rorschach himself considered becoming a professional artist in his younger years. During his time as a secondary school student, he was nicknamed “Kleck,” the German word for “inkblot,” because of his interest in sketching and, more specifically, his fondness for klecksography, a popular game that consists of filling a piece of paper with ink and then folding it to obtain unique and interesting patterns and figures. As you may suppose, this childhood passion later became the foundation for Rorschach’s famous test.

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The Inkblots Aren’t Random

Despite popular belief, the 10 inkblots used in the test aren’t just random patterns. Rorschach carefully selected them from thousands of potential images, choosing specific designs that he found most effective in eliciting meaningful responses. Each blot was deliberately crafted with certain characteristics in mind, including specific colors, shading, and forms. The images are presented according to standardized instructions, such as the order in which they’re shown to the patient. 

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The Images Are Supposed To Be Secret

The Rorschach inkblots were supposed to be kept secret, but — like nearly everything else these days — they’re now easy to find online. The bubble of secrecy first burst in 2009, when emergency physician James Heilman posted all 10 inkblot plates on Wikipedia alongside the most common responses for each card. Outrage ensued, primarily from psychologists who complained that making the tests public rendered them useless. The complaints were valid, as the test is meant to be administered to people who have no prior familiarity with the images. 

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The Rorschach Test Has a Complex Scoring System

The Rorschach test doesn’t just consist of showing it to a subject, asking what they see, and then interpreting the results based on the psychologist’s opinion alone. There are multiple types of complex scoring systems involved. 

For the last three decades, the Rorschach Comprehensive System, developed by psychologist John Exner, has been the leading approach worldwide when it comes to scoring the test. In this case, scoring a subject’s responses is based on standardized factors such as location (which part of the blot was used), determinants (what influenced the response), content (what was seen), and special scores (any unusual characteristics of a response). Once every card has been shown, the psychologist codes each response to create an interpretative report based on the patient’s scores.

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All the Cards Are Symmetrical

Of the 10 official inkblots in the Rorschach test, five inkblots are of black ink, two are of black and red ink, and three are multicolored — and all the cards are symmetrical. This symmetry may simply seem like the inevitable result of creating images using ink-blotting techniques, but for Rorschach, the symmetry played an important role. In Damion Searls’ book The Inkblots, Rorschach explains how “symmetry makes the form more pleasing to the eye and thus makes the subject more willing to perform the task.” He also notes that symmetrical images are equally suitable for left-handed and right-handed people and how the symmetry “encourages the seeing of whole scenes.” 

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The Test Has Been Blotted All Over Pop Culture

In addition to making an indelible mark on psychology, the Rorschach test has become engrained in popular culture. In the 1980s, Andy Warhol made a series of paintings inspired by the inkblots, some more than 13 feet tall. Like many people, he had some misconceptions about the test. He was quoted by Los Angeles’ contemporary art museum The Broad as saying, “I thought that when you went to places like hospitals, they tell you to draw and make the Rorschach tests. I wish I’d known there was a set.”

Perhaps the most famous use of the Rorschach inkblots in pop culture is the character of Walter Kovacs, a vigilante also known as Rorschach who appears in the classic comic book series Watchmen and its 2009 movie adaptation. Rorschach wears a white mask adorned with a symmetrical — but constantly shifting — inkblot pattern.

Tony Dunnell
Writer

Tony is an English writer of nonfiction and fiction living on the edge of the Amazon jungle.

Original photo by Maximum Film/ Alamy Stock Photo

Filmmakers take their inspiration from a wide range of sources, whether adapting a book or TV series, making a biopic about a historical figure, or writing an original screenplay based on actual events. Another, perhaps more surprising source of inspiration is paintings, which, after all, are another visual art form. 

Many movie scenes have been inspired by famous works of art. For example, René Magritte’s “The Empire of Light” and “Architecture au clair de lune” inspired scenes in The Exorcist and The Truman Show, respectively. In Martin Scorsese’s Shutter Island, Leonardo DiCaprio and Michelle Williams share an embrace lifted straight from Gustav Klimt’s “The Kiss.” And in the 2002 comedy-drama About Schmidt, Jack Nicholson falls asleep in the bath to cleverly recreate Jacques-Louis David’s “The Death of Marat.”

While there are many more examples of paintings that have inspired specific movie scenes, films based entirely on a painting are less common — but such films do exist. Here are five movies in which filmmakers were so struck by a painting (or series of paintings) that they decided to translate it to the big screen, whether in the plot or in the movie’s feel and tone. 

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Gladiator: “Pollice Verso”

If it wasn’t for a painting, we might never have gotten one of cinema’s greatest historical epics. When trying to convince Ridley Scott to direct Gladiator, producer Douglas Wick and DreamWorks executive Walter F. Parkes showed Scott “Pollice Verso,” an 1872 painting by French artist Jean-Léon Gérôme. The painting depicts a Roman gladiator standing over his fallen opponent, looking up at crowd members who are giving the thumbs-down signal for death, while the defeated gladiator raises two fingers to plead for mercy. 

That dramatic image was enough to seal the deal. As Wick told The Hollywood Reporter, Scott looked at the painting and said, “I’ll do the movie. Wherever the script is, we’ll get it right. I’m doing this movie.’” The painting became a major reference point for the entire production, influencing not just individual scenes but Scott’s entire depiction of ancient Rome. 

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Days of Heaven: “Christina’s World” 

Director Terrence Malick is known for his lavish cinematography and aesthetics, and his 1978 period drama Days of Heaven, the story of a young couple who travel to the Texas panhandle for work harvesting crops, is no exception. Malick and cinematographer Néstor Almendros took the movie’s tone and visual style directly from the paintings of Andrew Wyeth, most notably his iconic work “Christina’s World.” The film’s iconic shots of wheat fields and isolated farmhouses echo Wyeth’s American pastoral style, along with his themes of memory, nostalgia, and loss.

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Girl with a Pearl Earring: “Girl with a Pearl Earring” 

Girl with a Pearl Earring is a movie based on a book based on a painting, all with the same name. The movie is an adaptation of Tracy Chevalier’s 1999 novel, which offers a fictional account of Johannes Vermeer, his famous painting, and its model. The identity of the girl in the painting has long been the subject of debate, but it’s likely the painting was a so-called “tronie,” a study of a head and shoulders dressed in exotic clothing in which the model isn’t necessarily meant to be a specific person. 

Both book and movie delve into a fictionalized history behind the creation of the painting, while also exploring themes of art and love. The movie’s director, Peter Webber, and cinematographer Eduardo Serra went to great lengths to make the film look and feel like Vermeer’s work, evoking the light, color, textures, stillness, and intimacy that characterize his paintings, many of which portray domestic interior scenes of middle-class life. The movie incorporates six of Vermeer’s other paintings into its story as well: “View of Delft,” “Woman with a Pearl Necklace,” “The Milkmaid,” “The Concert,” “The Girl with the Wine Glass,” and “Woman with a Water Jug.”

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The Mill and the Cross: “The Procession to Calvary” 

Director Lech Majewski’s groundbreaking 2011 drama The Mill and the Cross literally takes us on a journey inside a painting. The artistic work in question is Pieter Bruegel the Elder’s 1564 painting “The Procession to Calvary,” which depicts Christ carrying the cross amidst an expansive landscape full of some 500 characters, including the Virgin Mary and various saints, soldiers, and onlooking peasants. 

The movie whisks us into the painting and follows 12 characters that appear in Bruegel’s work, their lives unfolding and intertwining over the course of a single day. The film is bold and experimental with little dialogue. As famed film critic Roger Ebert wrote on his website, The Mill and the Cross takes “a great stride outside the narrow space of narrative tradition and present[s] us with things to think about.”

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Isle of the Dead: “Die Toteninsel” 

Between 1880 and 1886, the Swiss Symbolist artist Arnold Böcklin produced a series of moody paintings called “Die Toteninsel (Isle of the Dead),” all depicting a similar scene featuring a small and rather ominous Mediterranean island with tombs and a stand of cypress trees. The series was widely reproduced and highly influential, inspiring a piece of music by Sergei Rachmaninoff and interpretations by the artists H.R. Giger and Salvador Dalí.

Later, the painting became the inspiration for the 1945 horror movie Isle of the Dead starring Boris Karloff, about a plague that breaks out on a small Grecian island. The movie’s producer, Val Lewton, borrowed not only the painting’s title and island setting but also much of the imagery and overall mood of Böcklin’s work.

Tony Dunnell
Writer

Tony is an English writer of nonfiction and fiction living on the edge of the Amazon jungle.

Original photo by alex_ugalek/ iStock

The first known recording of a human voice (a 10-second clip of someone singing the French folk song “Au Clair de la Lune”) was captured on April 9, 1860, using a device called a phonautograph. Until that point, people remained blissfully unaware of what their voices sounded like to other people.

Fast forward from phonautographs to smartphones, and we can now obsess over how our recorded voice just sounds off. Yet audio recordings are more reflective of your real speaking voice than the voice you hear in your head. Let’s get into why there’s a difference between the two sounds and why many of us cringe when we hear what our voice sounds like to others.

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It All Starts With the Ossicles

The smallest bones in the human body, the ossicles, transmit sound to the inner ear. The cochlea, a kind of spiral-shaped organ, then transforms this vibration into electrical impulses using 25,000 auditory nerves that send a signal through the auditory nerve to the brain. This entire process is known as auditory transduction, and it all occurs within just a few milliseconds. 

The ear achieves transduction through two means: bone conduction (movement of ossicles) and air conduction (movement of air outside the ear). When a person speaks, the ear uses both those methods to make sense of the sound. But because your mouth is close to your ear, the ossicles vibrate more, distorting your voice to a lower pitch inside your head and giving you a “false sense of bass,” according to the BBC. Audio recordings, on the other hand, directly convert sound waves into digital data, so they capture your voice exactly as it sounds to others. This explains why your voice is usually a slightly higher pitch than what you’re used to hearing in your head.

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Why You Might Not Like Your “Real” Voice

This difference in sound often makes people dislike their recorded voice, and studies suggest that auditory “ick” has a psychological component as well. Because voices are central to self-identity, hearing the higher, thinner sound (less full and rich due to the lack of aforementioned “bass”) compared to your internal perception of your voice can be exceptionally jarring. However, a series of studies have found we’re particularly biased in assessing the quality of our recorded voice. 

A 2005 study, for example, asked patients to rate their voice quality before asking clinicians to rate those same voices. Overwhelmingly, the patients rated their own voices more negatively compared to the clinicians. And in another study in 2013, participants were asked to rate the attractiveness of an array of different voices, with their own voice secretly included in the mix. People rated their voices significantly higher in quality when they were unaware the voice was their own. 

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You Have Many Kinds of Voices

Throughout life, your voice changes. The most dramatic example of this is during puberty; as the larynx grows and moves down lower in the neck, vocal cords lengthen and thicken, and as a result, your voice deepens. However, this process continues as we age, as vocal cords become thinner and cartilage becomes less flexible. This makes women’s voices slightly lower and men’s voices slightly higher. 

Your voice can also change depending who you’re talking to, a concept known as “speech accommodation.” For example, a 2017 study concluded that conversations where perceptions of social status are present, such as a manager speaking with a potential hire, can affect the pitch of someone’s person’s voice, and some experts even say people have a unique voice for every single relationship in their life, whether it’s their boss, their mother, or their best friend. Another concept known as “phonetic convergence” explains how people who spend a lot of time together begin to sound alike.

Even armed with the knowledge that your voice is a mutable rainbow of textures and tones, hearing it on a recording may still give you pause.Thankfully, some evidence suggests you can get used to your true voice through sheer exposure. Once you get over the shock of your thinner, higher voice, you may slowly learn to love it — or at least tolerate it.

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 Polina Tankilevitch/ Pexels

When looking for a quick, simple meal on the cheap, it’s tempting to turn to a trusty fast-food establishment — just ask the hundreds of millions of diners around the globe who flock to KFC, McDonald’s, and the like each day. Many of these chains are especially renowned for one particular food item, a popular favorite that has customers coming back again and again. In fact, some menu items sell upward of one billion units annually — a staggering amount that’s frankly harder to wrap your head around than it is to wrap up a Chipotle burrito. Let’s dig in and explore six of the world’s bestselling fast-food items based on relevant news reports and public data provided by each brand.

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McDonald’s French Fries

Although McDonald’s got its start in the 1940s by selling hot dogs, it’s predominantly known today for its burgers and fries. Both of these beloved menu items exceed $1 billion in annual sales, but french fries have a slight edge as the bestselling McDonald’s product at the 40,000+ locations around the world.

According to Yahoo, McDonald’s is estimated to sell more than 9 million pounds of its crispy, golden fries on a daily basis. Looking at the approximate weight of each bag of fries, that equals roughly 51 million small, 36 million medium, or 27 million large containers of fries. Multiply those numbers by each day of the year, and you’re looking at billions of orders of fries served up by McDonald’s annually.

McDonald’s has plenty of supply to keep up with demand: According to an NBC News report, the fast-food giant purchases at least 3.4 billion pounds of spuds each year. Of course, McDonald’s is also known for its burgers, its runner-up bestseller, of which the company sells an estimated 2.4 billion annually.

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Burger King Whopper

When you think of Burger King, the first thing that likely comes to mind is its famous flame-grilled Whopper sandwich. According to the Creative Foods Corporation (CFC) — one of the largest franchisees of Burger King establishments in the U.S. — more than 1.3 billion Whoppers are sold around the globe each year, which equates to 41 Whoppers eaten every second. CFC also points out there are no less than 221,184 unique ways to customize a Whopper by mixing and matching various ingredients. 

In 2022, Burger King conducted a U.S.-based national study to determine which states loved Whoppers the most. The results showed that New Mexico ordered the most Whoppers of any state, while North Carolina ordered the most Double Whoppers and Montanans scarfed down the most triples. But Burger King also sells Whoppers in more than 100 countries around the world, which explains how it’s able to sell more than a billion of these burgers each year. You won’t find any Burger Kings in Australia, though: Due to a trademark issue, the chain operates using the name “Hungry Jack’s” in the Land Down Under.

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Dairy Queen Blizzard

Dairy Queen first introduced its now-iconic Blizzard in 1985, combining soft-serve ice cream with a variety of fillings and syrups including Oreo cookies, M&M’s, and Reese’s cups. The frosty treat sold around 75 million cups in its first year, a number that leapt to more than 175 million the following year, and this delightful confection has remained a bestseller ever since.

In 2020, Reuters reported that U.S. Blizzard sales had topped $1 billion dollars for the first time, showcasing the product’s enduring popularity. To make those numbers even more impressive, the data company Mirus reported that Blizzards alone make up 23% of Dairy Queen’s total sales. Given the average cost of a Blizzard ranges anywhere from $3.99 to $5.79, it’s reasonable to assume DQ sells in excess of 200 million Blizzards annually. 

The most popular Blizzard flavors vary by location. A team of researchers from Grand Canyon University conducted a national study using data from as far back as 2004, determining the Turtle Pecan Cluster Blizzard to be the most popular flavor in 13 U.S. states. The runner-up was the Oreo Cookie Blizzard, which is the reigning flavor in 11 states.

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Chick-fil-A Chicken Sandwich

Chick-fil-A continues to carve out a place as one of the most popular chicken chains in the fast-food industry, and that’s without much of a global presence — yet. The company has plans to expand its presence in Europe and Asia, with new locations opening in the United Kingdom and Singapore throughout 2025. But even with the lack of widespread international fame, Chick-fil-A sells a shockingly large amount of its beloved chicken sandwich, which comes in fried and grilled varieties.

The company generated $18.814 billion in sales in 2022, trailing only McDonald’s and Starbucks within the fast-food market. The bestselling item was its chicken sandwich, of which it sold 527 million in that year alone. Sales grew an astounding 14.7% the following year, outpacing other chicken-centric competitors such as Popeyes and KFC. 

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Taco Bell Crunchwrap Supreme

The Crunchwrap Supreme is a relatively recent creation that came out of Taco Bell’s Innovation Kitchen in 2005. The idea was concocted by product developer Lois Carson, who came up with the tortilla-wrapped pouch filled with ground beef, cheese, crunchy shells, veggies, and salsa. Executives initially dismissed the product over concerns it would take too much time for employees to fold the sides over — but that little bit of extra time paid off for the franchise.

Within six weeks of its debut, the Crunchwrap Supreme sold 51 million units and quickly became the quickest bestselling product in company history. The item became a permanent fixture of the Taco Bell menu in 2006 and is now sold at the vast majority of the 8,000+ Taco Bell restaurants around the world. 

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Popeyes Biscuits

Popeyes operates more than 3,000 U.S.-based restaurants and an additional 1,000+ around the world, making it among the most popular fast-food chicken chains on the planet. But as popular as its chicken-based menu items are, they continue to be overshadowed by the chain’s buttermilk biscuits. Popeyes opened its first location in 1976, but it wasn’t until 1983 that it unveiled its beloved biscuits, which are staples of the current menu, selling hundreds of millions each year. According to a Popeyes press release, the chain sold more than 292 million biscuits in 2018, which equals roughly one biscuit every 12 seconds.

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.

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In the modern era of blockbuster filmmaking, production budgets have skyrocketed and show few signs of slowing down. The 10th movie in the Fast & Furious franchise, for example, cost $340 million — that’s $140 million more than the reported budget for F9 (released just two years prior in 2021), and almost 10 times the cost of the first Fast & Furious movie, which came out in 2001. It’s a staggering amount of money, but modern film budgets, especially blockbusters, routinely pass the $300 million mark. 

Making a film is a monumental undertaking — you only need to sit through the credits of a major studio movie to see how many people are involved. Costs include the initial script and development, licensing, salaries for the big-name players (including the producer, director, and the A-list actors), production costs (and salaries for the hundreds, if not thousands, of people involved), and depending on the type of movie, the enormous cost of special effects. And that’s before distribution and marketing, which can easily add tens of millions more. 

Placing a precise figure on the cost of any particular movie is a tricky business, as studios aren’t always forthcoming with such information. Trade insiders make educated guesses, but hidden marketing costs, tax breaks, accounting tricks, and conflicting stories mean public information about movie budgets are usually estimated. But the really big movies attract a huge amount of attention, and their gargantuan production budgets give us a fairly good idea of where they rank among the most expensive movies of all time. Here are six of the most costly productions, all of which had budgets that far surpassed the $300 million mark. 

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Avengers: Age of Ultron (2015): $365 Million

Upon its release in 2012, The Avengers shattered all box office expectations and solidified the franchise as a true behemoth. Three years later, its sequel, Age of Ultron, had a lot to live up to. Marvel Studios invested a massive $365 million into the production, in part to pay for the star-studded cast — Robert Downey Jr.’s earnings alone were reported somewhere between $50 million and $80 million. 

Massive sets, numerous large-scale action sequences, and a boatload of special effects (Age of Ultron had more than 3,000 VFX shots, more than any other film in the Marvel franchise at the time) made the movie even more expensive. Shooting the film in multiple international locations, including Italy, South Africa, South Korea, the United Kingdom, and Bangladesh, further increased the cost. Despite being the lowest-grossing of the Avengers films, Age of Ultron still earned an estimated $1.4 billion.

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Pirates of the Caribbean: On Stranger Tides (2011): $379 Million

At the time of its release, the fourth installment in the Pirates franchise was the most expensive film ever made, with a total cost of $379 million. Research by Forbes puts its total cost as high as $410.6 million when not taking into account the tax credit due to the film’s production in the United Kingdom. The sky-high costs could be chalked up to various factors, including the need to capture scenes at sea, the use of full-scale ships, multiple shooting locations in Hawaii, the U.K., Puerto Rico, and California, extravagant special effects, and shooting in 3D. Plus, Johnny Depp’s salary alone was reported to have been $55 million. Despite mixed reviews, the movie earned more than $1 billion globally.

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Avengers: Endgame (2019): ~$400 Million

Avengers: Endgame was the direct sequel to Avengers: Infinity War (2018) and — take a deep breath — the 22nd film in the Marvel Cinematic Universe. No one knows quite how much Endgame cost, but estimates have it somewhere between $350 million and $400 million, most likely falling toward the higher end of that range. As with other Marvel Studios movies, the enormous ensemble cast, near-unprecedented visual effects work, and the logistical challenges of coordinating such an enormous production at multiple international locations, all added up to make it one of the most expensive movies of all time. 

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Indiana Jones and the Dial of Destiny (2023): ~$402 Million

Walt Disney Studios hasn’t been particularly forthcoming with the finances involved in making the fifth and (supposedly) final installment in the Indiana Jones film series, especially because the movie was a financial disappointment. According to Screen Rant, Dial of Destiny had a budget of $387.2 million, while Forbes has the figure as high as $402 million. 

The film made $384 million at the box office, with Disney’s box office losses reportedly equalling $134.2 million (studios receive around half of theater takings). The movie’s high production costs were partly due to the extensive digital de-aging effects for Harrison Ford, which significantly increased the special effects budget. But the biggest factor was filming during the height of the COVID-19 pandemic, which required costly safety protocols at every level of production. 

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Avatar: The Way of Water (2022): $460 Million

Director James Cameron has always been known for pushing the boundaries of filmmaking. His long-awaited sequel to Avatar was no exception, with groundbreaking visual effects technology including revolutionary underwater motion capture techniques and the development of a neural network-based facial system to help blue-skinned humanoid Na’vi characters appear in photorealistic quality. The movie was ambitious to say the least, and such high ambitions come with a cost: in this case, a reported $460 million. But the investment paid off; the movie grossed more than $2.3 billion worldwide, making it just the sixth movie in history to reach the $2 billion mark. 

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Star Wars: The Force Awakens (2015): $533 million

The return of the Star Wars saga to the big screen was hugely anticipated and came with a massive price tag to match. As a Star Wars movie, the production naturally involved numerous practical sets and props as well as cutting-edge visual effects, all of which ramped up costs. Extensive location shooting in Abu Dhabi, Iceland, Ireland, and the U.K. also added to the tally.

Harrison Ford was paid between $10 and $20 million, while Carrie Fisher and Mark Hamill earned somewhere in the low seven-figure range. Disney Studios also invested heavily in marketing, eager to ensure the franchise relaunch was a success. All of this added up to a total production budget of an astounding $533.2 million — but it was worth the expenditure. The Force Awakens quickly broke records, making more money in a single day than any other movie to that point. It continued to break numerous box office records and went on to gross more than $2 billion worldwide.

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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A trip to the doctor’s office can be a nerve-wracking experience, whether it’s for a routine checkup or addressing a pressing health concern. In fact, studies show nearly half of American patients report experiencing anxiety before medical visits. 

If you’re feeling anxious about scheduling a doctor’s appointment, knowing what to expect — and what’s expected of you — can help alleviate some of your concerns and ensure your visit runs smoothly. By understanding proper doctor’s office etiquette, you can not only reduce your stress but also foster a more respectful and efficient environment for the doctor, staff, and other patients. Here are nine helpful tips to keep in mind the next time you visit the doctor.  

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Arrive Early

Because doctors and medical staff typically have tight schedules, it’s important to arrive not just on time, but preferably early for medical appointments. If the first patient of the morning is late, it can delay every subsequent appointment throughout the day. Plan to arrive at least 15 to 20 minutes prior to your scheduled appointment time so you can check in, complete any necessary paperwork, and have your vital signs recorded. Arriving early can also help ease your stress so you’re composed and ready when you see the doctor.

If you know you’re going to be late for your appointment, call the office as soon as possible to notify them and minimize or avoid any disruption to their schedule. They may be able to accommodate a late arrival, but you should be prepared to have to reschedule your appointment if you’re considerably late.

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Know the Cancellation Policy

Familiarize yourself with your doctor’s cancellation and no-show policies, which are typically posted on the practice’s website. Call the office as soon as you know you need to cancel or reschedule an appointment and ask for guidance. Try to be understanding and flexible regarding rescheduled appointments — and be aware that some doctors’ offices will charge a fee for a no-show or an appointment that’s cancelled less than 24 hours in advance.

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Follow All Office Policies and Procedures

Every doctor’s office has its own specific set of rules and guidelines, from mask requirements to payment protocols. Familiarize yourself with these policies beforehand to avoid any surprises. If you’re unsure about anything, don’t hesitate to call the office and ask ahead of time.  

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Practice Being a Patient Patient

Medical offices are busy places, and delays are sometimes unavoidable due to emergencies or consultations that run longer than expected. While waiting can be frustrating, make the most of any reasonable wait time by reading a book or magazine or pursuing another quiet activity such as knitting or scrolling your phone. If more than 30 minutes have passed since your scheduled appointment time and no one has communicated with you about when you can expect to be seen by the doctor, feel free to politely inquire. If the wait time is unknown or seems excessive, you can ask to reschedule.

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Come Prepared

Preparation is key to making the most of your appointment. Bring a list of your current medications, any symptoms you’re experiencing, and all the questions you’d like to discuss. If this is your first visit to the office, have your medical history, insurance card, and identification handy. Writing down your concerns beforehand ensures you don’t forget anything important and allows the doctor to address your issues more efficiently.

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Communicate Effectively

Be honest about your symptoms, lifestyle, and medical history, even if the topics are uncomfortable. Doctors rely on accurate information to provide the best care, and it’s their job to protect your privacy. At the same time, try to keep things concise to avoid overwhelming the doctor with unnecessary details. Stick to the facts and answer their questions as clearly as possible. If you come to the appointment to support someone else, keep their needs in mind and allow them space to communicate directly with the medical staff, only contributing to the discussion when necessary.

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Respect Privacy and Boundaries

Avoid asking fellow patients about their reasons for visiting or making unnecessary small talk in the waiting room. Respect the privacy of others by keeping conversations discreet and avoiding eavesdropping. Be aware of your physical space and try your best not to encroach on others. Remember that medical information is private, so don’t ask doctors, nurses, or any other staff members about other patients.

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Minimize Phone Usage

It’s fine to use your phone to read or text while waiting, but keep the volume muted. You can use headphones or earbuds to listen to an audiobook or watch a video, but you may want to leave one out so you can easily hear when your name is called. To avoid invading the privacy of others, don’t make video calls or take photos while in the waiting room. Keep your phone on silent and step outside if you need to take an urgent call.

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Don’t Bring Anyone Who Doesn’t Need To Be There

Keep in mind that doctor’s offices are often crowded during peak times and seating space may be scarce. It’s fine to bring along a friend or family member as a patient advocate, but avoid having multiple people accompany you to an appointment. If it’s necessary for you to bring children along, make sure they’re supervised, and bring some quiet activities to keep them occupied.  

Kristina Wright
Writer

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

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Aging is something we all experience, yet negative stereotypes continue to persist in pop culture, shaping how we see older people and what we expect from our own later years. These myths about aging are often borne out of fear or misunderstanding, but science and lived experiences can prove them wrong. 

Of course, aging isn’t a one-size-fits-all experience — it’s influenced by our choices, opportunities, and attitudes. How we care for ourselves, as well as our perspective on the aging process, play a huge role in our health and well-being as we grow older. By breaking down these misconceptions, we can encourage a society that values and supports people of all ages, which can help everyone thrive through each of life’s stages.

Here are five common myths about aging that have been debunked to offer a more empowering view of what it means to grow older.

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Myth: Aging Definitely Means Declining Health

While it’s true that certain health challenges become more common with age, getting older doesn’t automatically equate to poor health. In fact, many issues often blamed on aging are actually influenced more by our lifestyle choices. Maintaining a balanced diet, staying active, and avoiding harmful habits such as smoking or excessive alcohol can promote good health well into later years. Regular check-ups, screenings, and preventative care are also key to catching potential health concerns early, which helps older adults stay active, independent, and thriving.

Exercise is particularly powerful in supporting overall well-being. Activities including walking, gardening, and yoga can help maintain muscle strength, bone density, and cardiovascular health while lowering the risk of chronic conditions such as diabetes and arthritis. Even light, consistent movement has the ability to improve resilience. Plus, research shows holding a positive attitude toward the aging process can improve both physical and mental health.

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Myth: Cognitive Decline Is Inevitable

A lot of people think they should expect a significant cognitive decline in their later years, but that’s not always the case. While it’s normal for some things such as processing speed to slow down a bit, many mental abilities stay strong or even improve with age. For example, older adults often shine in areas including problem-solving, managing emotions, and drawing from their deep well of knowledge to offer insights and wisdom — key aspects of what’s known as “crystallized intelligence,” aka the kind of cognition that comes from lived experience.

Studies show that staying mentally active, socially engaged, and physically healthy can do wonders for our brain health. A study published in Nature Aging found that greater social participation in midlife and later life is associated with a 30% to 50% lower risk of developing dementia. Other activities — such as picking up a new hobby, tackling word puzzles or math problems, or simply staying curious about the world around us — can also help keep our minds sharp. And we know now that exercise, a balanced diet, and good sleep are all proven ways to support cognitive function at every age.

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Myth: You Can’t Learn New Things in Old Age

The saying “you can’t teach an old dog new tricks” couldn’t be further from the truth. From language-learning to mastering a musical instrument or exploring technical skills, there’s no limit to what older adults can achieve. Many people even find they’re better learners later in life, often because they have a clearer sense of purpose and more time to dedicate to their chosen pursuits. And the human brain retains its ability to grow and adapt throughout life, thanks to neuroplasticity — the brain’s ability to reorganize itself by forming new neural connections. This remarkable capacity allows older adults to learn new skills, take up hobbies, or embark on entirely new career paths.

Learning new things as we age is not only personally rewarding, but it also comes with additional health benefits. A study highlighted by the Association for Psychological Science found that older adults who engaged in learning multiple new skills simultaneously experienced significant cognitive improvements, reinforcing the idea that such activities can enhance mental functioning in older age.

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Myth: Older People Need Less Sleep

The belief that older adults require less sleep is a persistent misconception. While aging can be accompanied by changes in our sleep patterns — such as lighter sleep, more frequent awakenings, or earlier bedtimes — the actual sleep requirement remains consistent. Older adults still need about seven to nine hours of sleep per night, similar to their younger counterparts. Regardless of age, sufficient sleep is essential for physical health, cognitive function, and emotional well-being. When older adults consistently get less sleep than they need, it can lead to problems including memory impairment, weakened immunity, and an increased risk of chronic conditions such as heart disease or diabetes.

Research shows that changes in sleep quality as we age are often linked to external factors rather than biological necessity. For example, health issues, medications, and lifestyle habits can all disrupt our sleep. Practicing good sleep hygiene — such as maintaining a consistent bedtime, limiting caffeine or alcohol and phone usage before bed, and staying physically active — can help improve overall sleep quality. Addressing underlying conditions often associated with aging, such as sleep apnea or restless leg syndrome, can also make a tremendous difference in ensuring we get the proper rest we need to thrive.

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Myth: The Best Years Are Behind Us

Society often associates youth with achievement, fueling the myth that our best years are behind us as we age. But passion and potential have no expiration date. Older adults frequently accomplish remarkable things, proving that age is no barrier to success. Staying active is crucial for physical and mental vitality, and many older adults defy expectations by embracing new challenges. Diana Nyad, at 64, became the first person to swim 110 miles from Cuba to Florida without a shark cage, while Fauja Singh ran his first marathon at 89 and continued to complete long-distance races well past his 100th birthday.

Creativity and innovation also continue to flourish with age, thanks to our accumulated life experiences and perspective. Author Bonnie Garmus published her wildly popular debut novel Lessons in Chemistry in her 60s, and model and fashion mogul Linda Rodin launched a successful beauty empire after turning 50. These successes, along with countless other big and small feats accomplished by older adults, prove aging isn’t about leaving our prime behind — it’s about building on what we’ve learned, embracing new opportunities, and continuing to grow and prosper in meaningful ways.

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 size gap between the biggest and smallest creatures in the animal kingdom can boggle the mind. On one end you have gigantic organisms such as the blue whale, some of which have been recorded at more than 100 feet long. But on the other side of the spectrum you have certain species that are so infinitesimal they can comfortably fit on the tip of a human finger. 

Here’s a look at some of the world’s tiniest creatures, from minute mammals to fun-sized fish. (Of course there are also microscopic bacteria to consider, but those fall under a separate classification outside of the animal kingdom.) This list includes examples from each of the six basic groups of animals — mammals, birds, fish, reptiles, amphibians, and invertebrates — each of which contains living beings whose sheer diminutive size may be hard to fathom. 

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Mammal: Bumblebee Bat

The world’s smallest mammal, as noted by Guinness World Records, is the Craseonycteris thonglongyai, commonly known as the bumblebee bat due to its size. This teeny animal is also known as Kitti’s hog-nosed bat, a name that pays homage to its snoutlike nose and the fact it was discovered in 1974 by zoologist Kitti Thonglongya. 

The body of the average bumblebee bat measures a mere 1.14 inches to 1.29 inches long, though it has a relatively long wingspan by comparison — between 5.1 and 5.7 inches. The bat weighs between 0.05 ounces and 0.07 ounces, which is less than the weight of a dime and comparable to two grains of rice. This also means bumblebee bats are 80 million times lighter than the largest mammal, the blue whale. The creature is native to caves along Thailand’s Khwae Noi river as well as to Myanmar. Given their small stature, bumblebee bats rely on a diet of even tinier creatures such as itty-bitty spiders and moths.

There’s an argument to be made that the tiniest mammal is actually the Etruscan shrew (Suncus etruscus), which Guinness considers the smallest mammal in terms of total mass (while the bumblebee bee bat is the smallest by body length). These creatures are native to parts of the Mediterranean and South Asia and are slightly longer than bumblebee bats, measuring an average of 1.4 to 2 inches. While the smallest bumblebee bat may weigh 0.0599 ounces, however, some Etruscan shrews have been measured at 0.0529 ounces — a relatively substantial difference, even if on a tiny scale.

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Bird: Bee Hummingbird

The tiniest bird in the world is yet another creature with an apian nickname: the bee hummingbird. Also known by its scientific name Mellisuga helenae, this airborne critter is native to Cuba and the nearby Isla de la Juventud (Isle of Youth). Bee hummingbirds measure around 2.24 inches long, and more than half that length is composed of the bird’s bill and tail. Females are slightly larger than males, though both are infinitesimally small at an average weight of just 0.056 ounces. According to the Audubon Society, these petite birds are roughly half the weight of a standard hummingbird.

Despite their small size, bee hummingbirds work hard and fast, with wings that beat 80 times every second. (That number increases to 200 times per second during courtship flights, which are performed to attract mates.) You can tell a male bee hummingbird from its bright red throat, whereas females have more of a bluish-green and gray coloring. If you ever happen to be birdwatching in Cuba, keep an eye out for bee hummingbirds in rainforests, mountain valleys, and rural gardens — essentially anywhere there’s nectar for them to feed on.

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Fish: Spinyhead Seadevil

It may not be a trophy fish, but the Spinyhead Seadevil (Photocorynus spiniceps) holds the Guinness record for the world’s smallest fish. A relative of the anglerfish, this compact creature has an average length of just 0.24 inches, while the female is substantially larger at 1.8 inches, according to research conducted by Professor Theodore W. Pietsch of the University of Washington. Pietsch collected samples from the Philippine Sea, where the creatures live at a depth of around 4,675 feet.

That said, there’s some debate over how fish should be measured, and some newly discovered species have been deemed worthy competitors for the title of smallest fish. When it comes to female fish specifically, the record may go to Paedocypris progenetica, or the dwarf goby. Mature female dwarf gobies measure just 0.31 inches long and can be found in the swampy forests of Sumatra in Indonesia. 

Australian scientists William Watson and H.J. Walker Jr. posit another theory, claiming the world’s smallest fish may actually be the stout floater (Schindleria brevipinguis). In studying these fish, which are native to the Great Barrier Reef, Watson and Walker found the females measure around 0.27 inches long and males around 0.25 inches long. But the researchers also believe we should take weight into account when determining the tiniest fish. They suggest that stout floaters are more slender than the Spinyhead Seadevil and the dwarf goby and are therefore likely to weigh less than both species, though they lack conclusive evidence.

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Reptile: Nano-Chameleon

Of the roughly 11,500 known species of reptile — a number that continues to climb — the tiniest one of the bunch resides on the African island nation of Madagascar. This small reptile is a dwarf chameleon known by the scientific name Brookesia nana, though it’s also referred to as the nano-chameleon. The discovery of this tiny creature was made in 2021 by a team of German researchers, who successfully collected two specimens: one male and one female. The team found the male to be much smaller, clocking in at a record-setting 0.53 inches from snout to vent, plus another 0.33 inches if you include its tail. However, as noted by Guinness, reptiles are typically measured sans tail, “as tail lengths can vary depending upon injury and other external factors.”

As this record was only confirmed in 2021, there may very well be other reptiles we’ve yet to discover that are even smaller. For now, the nano-chamelon reigns supreme, having taken the record from the 0.62-inch Jaragua dwarf gecko of the Caribbean. Unlike a stereotypical chameleon, Brookesia nana is incapable of changing color and always appears to be a shade of brown.

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Amphibian: Brazilian Flea Toad

The name Brachycephalus pulex may sound like a towering dinosaur, but it’s actually a scientific name for the world’s smallest amphibian: the Brazilian flea toad. These little hoppers are native to the Serra Bonita mountain range along the Atlantic coast of Brazil and were first discovered in 2009. Ironically, the Brazilian flea toad isn’t a toad at all, but rather a frog. (They were initially believed to be toads, which accounts for the misnomer.)

It wasn’t until 2024 that scientists confirmed the record-setting size of these creatures, stripping the superlative from another frog, the Paedophryne amauensis of Papua New Guinea. Male Brazilian flea toads average 0.27 inches in length, though the smallest known example measured just 0.25 inches — smaller than a green pea or a housefly. Females are a bit larger, measuring 0.32 inches.

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Invertebrate: Myxozoa

While the other five main animal groups are made up of vertebrates, invertebrates are frequently much smaller owing to their lack of skeleton. And it doesn’t get any tinier than myxozoans, which are the smallest animals of any kind.

Myxozoans are a class of animal considered to be obligate parasites, meaning they can’t survive without a host from which to get nutrients. Tens of thousands of these species are estimated to exist, and they’re often found in marine or freshwater environments. Of the thousands of myxozoan species that have been studied, Myxobolus shekel may be the smallest. Zoological professor Nicola Di Girolamo says this species grows to be no more than 8.5 micrometers, which is equivalent to 0.0003 inches. But most other species of myxozoa aren’t much bigger, generally reaching lengths between 10 and 20 micrometers (0.00039 to 0.00078 inches).

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.

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One of the beautiful things about humanity is its rich mélange of customs and traditions. Unfortunately for international travelers, this cultural variety also extends to one of the more mundane facets of modern life: electrical outlets. The world actually runs on 15 different types of electrical plugs, each with their own rationale for existing.

These electrical varieties developed for reasons both historical and practical, and that’s why nearly 150 years after the switch was flipped on the world’s first power station, travelers must still traipse the globe with a bag full of dongles, attachments, and adapters to power their electronics. This is the story of how this inconvenient diversity originated, and why Americans and Europeans are unlikely to ever use the same outlets.

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The “War of the Currents”

At 3 p.m. on September 4, 1882, an engineer working on Thomas Edison’s Pearl Street Station flipped a switch. Suddenly, six coal-powered dynamos instantly illuminated some 400 lamps belonging to 82 customers living only a quarter mile from the world’s first power station, in New York City. Edison’s groundbreaking system operated on 110 volts (the difference of electric potential between two points) because it worked well with his newly introduced incandescent light bulbs. It also ran on direct current (DC), meaning power flowed continuously in one direction.

However, the pioneering work of Nikola Tesla and George Westinghouse soon showed that alternating current (AC), which is when current frequently reverses direction, could actually travel longer distances more efficiently. The ensuing “war of the currents” ultimately ended with AC emerging victorious. 

Soon, AC power began streaming into American homes and businesses, running at Edison’s previously established 110 volts but at Westinghouse’s 60 hertz — the frequency that determines how many times a current changes direction per second. Although the U.S. tweaked the standard voltage up to 120 volts in the 1960s, this arrangement remains largely unchanged — to this day, U.S. outlets continue to support 120 volts.

But as the rest of the world slowly electrified, not everyone agreed with the standards set by the U.S.

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Less Current, More Voltage 

While 110 volts may have been all well and good for Edison’s lightbulbs back in the late 1800s, European countries and companies realized this was not the most efficient (nor the cheapest) way to actually transmit electricity. To understand Europe’s beef with Edison, let’s take a quick detour into the simple math behind electrical transmission.

You can easily calculate electrical power by multiplying voltage by current (P = V * I). Current (I)  is the rate at which electrons flow through a conductor, while voltage is the force applied to move that current. If current is high, you need thicker cables to safely transmit electricity. However, if you increase the voltage in this simple equation, you can actually lower the current and still arrive at the same power level. 

This has the immensely beneficial side effect of allowing companies to use thinner copper wires, a material that can be pretty costly even in the best of times (and especially in war torn Europe in the early 20th century). Apart from saving some serious cash, countries also wanted to design their own plugs because the U.S.’s was notoriously unsafe and uninsulated. Additionally European countries — mainly Germany — wanted to use 50 hertz instead of 60 because it aligned better with the metric system.

The idea of countries developing their own electric standards may seem odd in our interconnected modern world, but in the 20th century, electric appliances were so few and travel distances so long and laborious, no one foresaw the need for international standardization. But by 1934, people at the International Electrotechnical Commission (IEC) had begun to think some form of standardization for electrical fittings might be a good idea. Unfortunately, this governing body only met twice before the outbreak of World War II, and by the time it reconvened in 1950, many countries were already entrenched in their own electrification schemes. 

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There Is a “Universal” Plug Type (But Only Two Countries Use It)

That doesn’t mean there haven’t been efforts to unify the world around one outlet to rule them all. Today, there are around 15 types of plugs, each denoted with a letter. The U.S. uses Type A and Type B plugs (two-pronged and three-pronged, respectively) while most of Europe uses Type C, E, and F plugs. Meanwhile, Italy uses type L, Switzerland uses Type J, Denmark uses Type K, and England uses Type G. Type G includes a fuse within the plug itself, making them the safest (and most cumbersome) plugs in the world.

Once you venture outside North America and Europe, things get even more complicated. In an attempt to organize this chaos, the IEC introduced the International Standard IEC 906-1 in 1986, known as the Type N plug, a universal plug that could work across borders. Yet nearly 40 years after its introduction, only two countries — Brazil and South Africa — have adopted the standard. The main problem is that while a universal plug and outlet system would make life easier for travelers, few countries have the will to invest billions to switch from one plug type to another. So for now, make sure you have the necessary gear to power your devices before commencing your globe-trotting.

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.