9 Transparently Amazing Facts About X-Rays

Hulton Archive/Getty Images
Hulton Archive/Getty Images

In 1895, Wilhelm Roentgen, a professor of Physics in Worzburg, Bavaria, was the first to find a way to peer inside the body without surgery. On the evening of November 8, he was experimenting with the conduction of electricity through low-pressure gases using an induction coil and a partially-evacuated glass tube when he accidentally discovered a mysterious ray capable of lighting up a fluorescent screen a few meters away. When he passed his hand between the ray and the screen, he glimpsed a shadow of his own bones. Further experimentation showed that the screen could be replaced by a photographic plate—and the x-ray was born. Roentgen would later earn the first Nobel Prize in physics for his discovery.

Since then, x-rays have revolutionized medical diagnosis and made a huge impact on astronomy, chemistry, and other branches of science. They’ve allowed us to peer inside our own DNA, as well as into distant galaxies. In 2009, the x-ray was named the most important modern scientific discovery by nearly 50,000 people in a Science Museum of London poll; even penicillin came in second.

1. THE X MEANS UNKNOWN.

Roentgen named his discovery X-strahlenstrahlen being German for “beam” or “ray,” and “x” being used in mathematics to indicate an unknown quantity.  Even though we now know much more about how x-rays work, their name has retained a sense of their original mystery. The rays have also been called “Roentgen's rays,” and the images they produce are sometimes known as “roentgenograms.”

2. ONE OF THE EARLIEST X-RAYS WAS OF THE DISCOVERER’S WIFE’S HAND.

Like many scientists, Roentgen started out by experimenting on his wife. One of his first x-rays—if not the first—was of his wife Anna Bertha's hand with her wedding ring on her finger (above). She was reportedly unimpressed by the image; by some accounts, she exclaimed “I have seen my death!” after looking at it for the first time. (You can see other very early x-rays courtesy of the British Library here.)

3. THEY WERE ALMOST IMMEDIATELY PUT TO USE.

Within weeks of Roentgen’s announcement, European surgeons were using x-rays to find bullets and other foreign substances in human bodies. One of the earliest diagnoses was by a British doctor who found a needle embedded in a woman's hand. By the following year, an x-ray department had been set up at the Glasgow Royal Infirmary, and x-rays were being used clinically in the US to diagnose bone fractures and gunshot wounds.

Not all uses were medically necessary, however—the daughter of one early adopter later reported that “at one of my birthday parties we had fancy rings for the children to wear and showed them their skeletal hands to loud shrieks of excitement: knowing what we do today, of course, he wouldn’t have done it.” 

4. PEOPLE USED TO THINK THEY WERE HARMLESS.

In the early days, people thought x-rays passed through the body as harmlessly as normal light. It wasn’t until Thomas Edison’s assistant Clarence Dally, who had worked extensively with X-rays, died of skin cancer in 1904 that people started taking the health concerns about the new technology seriously. 

Partly as a result of the perceived harmlessness—but mostly because of the novelty factor—there was a late-19th-century and early 20th-century vogue for x-ray machines, which started to appear at carnivals and as a curiosity in theatrical shows. The word “x-ray” was even added as a promotional gimmick to products like headache tablets and stove polish—part of a brief “x-ray mania” that saw the rays frequently mentioned in advertising, songs, and cartoons. 

During the 1930s, '40s, and early '50s, x-ray machines were also a not-infrequent feature of American shoe stores, which used them to ensure a better fit. You can see a demonstration of the concept in this clip from the 1920s silent film, General Personal Hygiene:

5. THEY REVOLUTIONIZED THE TREATMENT OF TUBERCULOSIS.

Until the advent of antibiotics for tuberculosis in the mid-20th century, rest in a sanatorium was generally considered the only cure for TB. Early detection was thought to be key for the cure to work, but the traditional method of diagnosing was to listen to chest sounds, which could sometimes be difficult to diagnose accurately. X-rays finally allowed doctors to see the characteristic shadows and spots on the lungs caused by masses of the M. tuberculosis bacteria, and mass radiography began to be used in armies, factories, and mines, with many lives saved as a result.

6. THEY CAN KILL CANCER.

Early experimenters with x-rays noticed that the rays had a tendency to burn skin, a tendency made worse by the fact that older machines exposed people to much higher doses of radiation than today. But while overexposure to the rays can cause cancer, they can also cure it. Even back in Roentgen's day, doctors were using x-rays to burn off moles. Besides being used for diagnosis, today narrowly focused beams of x-rays are used in some forms of cancer radiotherapy to destroy tumor tissues.

7. THEY ALLOWED US TO FIND THE STRUCTURE OF DNA.


Hulton Archive/Getty Images

Our understanding of the double-helix shape of DNA was provided in part by x-ray crystallography—a technique in which x-rays bounce off the three-dimensional pattern of atoms within a crystal lattice to form a shadow image of its structure. In the early 1950s, a British researcher name Rosalind Franklin took the x-ray photos that first showed DNA’s structure, but died before she could share the Nobel Prize with the men more generally given credit for discovering the shape of the “secret of life”—James Watson and Francis Crick.

8. THEY’VE HELPED US SEE INTO SPACE

More than a dozen telescopes that detect x-rays have been launched into space, which have allowed us to make discoveries far beyond our own solar system. In 1999, NASA deployed their Chandra X-ray Observatory aboard the Space Shuttle Columbia, which has since discovered black holes, advanced our understanding of dark matter, and looked at the huge black hole at the center of the Milky Way, among other achievements.

9. THEY’VE CHANGED OUR UNDERSTANDING OF ART AND ARTIFACTS.

X-rays have allowed scientists and art historians to see “underpaintings”—the rough sketches painters once used to guide their work—among other secrets. Seeing these underpaintings can help art historians gain a better understanding of the way artists once worked. X-rays can also show how paintings have been changed and restored over time, sometimes allowing for more authentic restorations.

X-rays have also been to study priceless artifacts—like Egyptian mummies—without damaging them. And they’ve revealed surprises, like the human corpse inside one Chinese statue. They’ve even been used to peer inside opaque amber to view otherwise invisible fossils of ancient animals, insects, and plants.

10 Fascinating Facts About the Thesaurus for National Thesaurus Day

iStock.com/LeitnerR
iStock.com/LeitnerR

Writers often turn to a thesaurus to diversify their vocabulary and add nuance to their prose. But looking up synonyms and antonyms in a thesaurus can help anyone—writer or not—find the most vivid, incisive words to communicate thoughts and ideas. Since January 18 is Thesaurus Day, we’re celebrating with these 10 fascinating facts about your thesaurus.

1. Its name comes from the Greek word for treasure.

Greek lettering.
iStock

Most logophiles consider the thesaurus to be a treasure trove of diction, but the word thesaurus really does mean "treasure." It derives from the Greek word thésauros, which means a storehouse of precious items, or a treasure.

2. You can call them thesauruses or thesauri.

Row of old books lined up.
iStock

How do you refer to more than one octopus? People say everything from octopuses to octopi to octopodes. Similarly, many people have trouble figuring out the correct plural form of the word thesaurus. Though thesauri is technically correct—it attaches a Latin suffix to the Latin word thēsaurus—both thesauri and thesauruses are commonly used and accepted today.

3. Early thesauruses were really dictionaries.

Close-up of the term 'ideal' in a thesaurus.
iStock

Ask a French scholar in the 16th century to see his thesaurus, and he'd gladly give you a copy of his dictionary. In the early 1530s, a French printer named Robert Estienne published Thesaurus Linguae Latinae, a comprehensive Latin dictionary listing words that appeared in Latin texts throughout an enormous span of history. And in 1572, Estienne's son Henri published Thesaurus Linguae Graecae, a dictionary of Greek words. Although the Estiennes's books were called thesauruses, they were really dictionaries comprised of alphabetical listings of words with their definitions.

4. A Greek historian wrote the first book of synonyms.

Stacks of books surrounding an open book and a pair of glasses.
iStock

Philo of Byblos, a Greek historian and grammarian, wrote On Synonyms, a dictionary of synonyms that scholars consider to be the first ancient thesaurus. Dating to the late 1st century or early 2nd century CE, the book lists Greek words that are similar in meaning to each another. Sadly, we don’t know much more about On Synonyms because copies of the work haven’t survived over the centuries.

5. An early Sanskrit thesaurus was written in the form of a poem.

Sanskrit lettering.
iStock

In the 4th century CE, an Indian poet and grammarian named Amara Sinha wrote The Amarakosha, a thesaurus of Sanskrit words. Rather than compile a boring list of similar words, Amara Sinha turned his thesaurus into a long poem. Divided into three sections—words relating to the divine, the earth, and everyday life—The Amarakosha contains verses so readers could memorize words easily. This thesaurus is the oldest book of its kind that still exists.

6. A British doctor wrote the first modern thesaurus.

Portrait of Peter Mark Roget.
Thomas Pettigrew, Wikimedia Commons // Public Domain

Peter Mark Roget is the British doctor credited with authoring the first modern thesaurus. In 1805, he began compiling a list of words, arranged by their meaning and grouped according to theme. After retiring from his work as a physician in 1852, Roget published his Thesaurus of English words and phrases; so classified and arranged as to facilitate the expression of ideas and assist in literary composition. Today, Roget’s Thesaurus is still commercially successful and widely used. In fact, we celebrate Thesaurus Day on January 18 because Roget was born on this day in 1779.

7. The thesaurus has a surprising link to a mathematical tool.

Image of a vintage log log slide rule.
Joe Haupt, Flickr // CC BY-SA 2.0

The division between "words people" and "numbers people" is deep-seated. Many mathematicians may try to steer clear of thesauruses, and bibliophiles may avoid calculators, but the thesaurus is actually linked to a mathematical tool. Around 1815, Roget invented the log-log slide rule, a ruler-like device that allows users to easily calculate the roots and exponents of numbers. So while the inventor of the thesaurus was compiling words for his tome, he was also hard at work on the log-log slide rule. A true jack-of-all-trades.

8. The Oxford English Dictionary has its own historical thesaurus.

Synonyms for
iStock

In 1965, a professor of English Language at Glasgow University suggested that scholars should create a historical thesaurus based on entries in the Oxford English Dictionary. The project was a massive undertaking, as people from multiple countries worked for 44 years to compile and classify words. Published in 2009, the Historical Thesaurus to the Oxford English Dictionary contains 800,000 words organized by theme and date. The thesaurus covers words and synonyms from Old English to the present day and lets readers discover when certain words were coined and how long they were commonly used.

9. One artist turned his love of words into a series of thesaurus paintings.

Mel Bochner,
Mel Bochner, "Crazy," 2004. Francesca Castelli, Flickr // CC BY-NC-ND 2.0

In 2014, the Jewish Museum in New York showed a survey of conceptual artist Mel Bochner’s art. Bochner had incorporated words and synonyms in his paintings for years—which were collectively referred to as the thesaurus paintings—featuring word paintings and lists of synonyms on canvas. The brightly colored paintings feature different groups of English and Yiddish synonyms. According to Bochner, Vietnam and Iraq war veterans cried after seeing his thesaurus painting Die, which features words and phrases such as expire, perish, succumb, drop dead, croak, go belly up, pull the plug, and kick the bucket.

10. There's an urban thesaurus for all your slang synonym needs

Copy of an Urban Dictionary book.
Effie Yang, Flickr // CC BY-NC-ND 2.0

Urban Dictionary helps people decipher the latest slang terms, but where should you go when you need a thesaurus of slang? Urban Thesaurus, of course. The site, which is not affiliated with Urban Dictionary, indexes millions of slang terms culled from slang dictionaries, then calculates usage correlations between the terms. Typing in the word money, for example, gives you an eclectic list of synonyms including scrilla, cheddar, mulah, coin, and bling.

This story originally ran in 2017.

10 Endangered Alphabets You Should See Before It's Too Late

The Glagolitic script carved into wood
The Glagolitic script carved into wood
Courtesy of Tim Brookes

The Arabic and Simplified Chinese scripts aren't in danger of going anywhere anytime soon, but the same can't be said for Balinese, Mali, Pahawh (or Pahauh) Hmong, and the other 100-some alphabets that Vermont-based writer Tim Brookes has cataloged in his online Atlas of Endangered Alphabets, which is set for a soft launch on January 17. The featured alphabets—which Brookes has loosely defined to include writing systems of all sorts—are vanishing for varied reasons, including government policies, war, persecution, cultural assimilation, and globalization.

“The world is becoming much more dependent on global communications and those global communications take place in a relatively small number of writing systems—really something between 15 and 20,” Brookes tells Mental Floss. “And because that’s the case, all the others are to some degree being eroded.”

The atlas will include a bit of background information about each alphabet as well as links to any organizations attempting to revive them. By creating a hub for these alphabets, Brookes hopes to connect people who want to preserve their language and culture, while also showing the world how beautiful and intricate some of these scripts—including the 10 below—can be.

1. Cherokee

Although the Manataka American Indian Council says an ancient Cherokee writing system may have existed at one point but was lost to history, Cherokee was more or less a spoken language up until the early 19th century. Around 1809, a Cherokee man named Sequoyah started working on an 86-character writing system known as a syllabary, in which the symbols represent syllables. Most remarkably, Sequoyah himself had never learned how to read. At the time, many Native Americans deeply distrusted writing systems, and Sequoyah was put on trial for witchcraft after tribal leaders caught wind of his new creation. However, once they realized that written Cherokee could be used to preserve their language and culture, they asked Sequoyah to start teaching the syllabary. “The Cherokee achieved 90 percent literacy more rapidly than any other people in history that we know of,” Brookes says. “[Sequoyah’s syllabary] is one of the greatest intellectual achievements of all time.”

After a period of decline in the years following the Indian Removal Act of 1830, Cherokee language education saw somewhat of a revival in the late 20th century. The predominance of English and the Latin alphabet has made these efforts an uphill battle, though. Brookes says it’s difficult to find people who can teach the script, and even among Cherokee translators, few are confident in their grasp of the writing system.

2. Inuktitut

A stop sign containing the Inuktitut script
A stop sign in Nunavut, Canada
Sébastien Lapointe, Wikimedia Commons // CC BY-SA 3.0

Nine different writing systems are used among Canada’s 59,500 Inuit. Many of these are based on the Latin alphabet, but the one shown above uses syllabics that were first introduced by European missionaries in the 19th century. Since it’s difficult and costly to represent each of these writing systems in official documents, many Inuit officials write and hold meetings in English, all but ensuring the demise of their mother tongue. However, Canada’s national Inuit organization, the Inuit Tapiriit Kanatami, is now in the process of developing one common script for all Inuit. “Our current writing systems were introduced through the process of colonization,” the organization writes on its website. “The unified Inuktut [the collective name for Inuit languages] writing system will be the first writing system created by Inuit for Inuit in Canada.” It remains to be seen what that script will look like.

3. Glagolitic

A tablet containing the Glagolitic script
The Baška tablet, which was made around the year 1100
Neoneo13, Wikimedia Commons // Public domain

It’s widely believed that Glagolitic, the oldest known Slavic script, was invented by missionaries Saint Cyril and Saint Methodius around 860 CE in an effort to translate the Gospels and convert the Slavs to Christianity. The name Glagolitic stems from the Old Church Slavonic word glagolati, meaning to speak. Some of the symbols were lifted from Greek, Armenian, and Georgian, while others were entirely new inventions. Nowadays, academics are typically the only ones who can decipher the script, but some cultural institutions have made efforts to preserve its legacy. In 2018, the National and University Library in Zagreb launched an online portal containing digitized versions of Glagolitic texts. In addition to being a source of Croatian heritage and pride, the alphabet has also become an object of tourist fascination. Visitors can view monuments containing Glagolitic symbols along the Baška Glagolitic Path on the Croatian island of Krk. And in Zagreb, the capital city, it’s not hard to find gift shops selling merchandise adorned with Glagolitic writing. However helpful this may be to the tourism sector, it's no guarantee that more Croatians will want to start learning the script.

4. Mandombe

The Mandombe script
Moyogo, Wikimedia Commons // Public domain

This African script is unusual for several reasons. For one, the Mandombe alphabet reportedly came to David Wabeladio Payi—a member of the Kimbanguist church in the Democratic Republic of Congo—in a series of dreams and spiritual encounters in the late ‘70s. One day, he was looking at his wall when he noticed that the mortar between the bricks seemed to form two numbers: five and two. He believed these were divine clues, so he set out to create a series of symbols based off those shapes. Eventually, he assigned the symbols phonographic meaning and turned it into an alphabet that could be used by speakers of the Kikongo and Lingala languages. Perhaps most remarkably, the pronunciation changes depending on how the symbols are rotated. “It’s one of about three writing systems in the world where that’s true,” Brookes says. Unlike most of the other alphabets on this list, Mandombe is growing in popularity rather than declining. However, because it’s primarily being taught in Kimbanguist schools and used only for religious texts, it will be a challenge to convince the rest of the population to start using it. Elsewhere in the country, the Latin alphabet is used (French is the official language). “What it’s up against is, in essence, exactly the same forces that a declining script is up against,” Brookes says. For this reason, many new alphabets can be considered endangered.

5. Ditema tsa Dinoko

In a similar vein, Ditema tsa Dinoko is also a minority script, and it's too new to tell if it will stick around. A team of South African linguists, designers, and software programmers invented this intricate, triangular-shaped alphabet in just the last decade in hopes of forging a single script that could be used by speakers of indigenous languages in South Africa, Botswana, Zimbabwe, and Mozambique. Because the symbols were inspired by artworks and beadwork designs that are typical of the region, the alphabet is also a celebration of culture. “One of the really interesting features of African alphabets is how deeply embedded they are in what we would call graphic design,” Brookes says. “Instead of imitating the shapes or structures or layout of other writing systems, such as our alphabet, they often start from a completely different point of view and draw on designs that are found in war paintings, weaving textiles, pottery, and all of those other available graphic elements.” The colors used in the alphabet aren't necessary to understand the script, but they hark back to the alphabet's artistic origins while also functioning as a kind of font. For instance, different writers may use different colors to give their text "a certain feel or emotional resonance," Brookes says.

6. Mandaic

The Mandaic script
Courtesy of Tim Brookes

This ancient, mystic script dates back to the 2nd century CE and is still being used by some Mandaeans in Iraq and Iran. According to mythology, the language itself predates humanity, and the script was historically used to create religious texts. Charles Häberl, now an associate professor of Middle Eastern languages and literatures at Rutgers University, wrote in a 2006 paper that Mandaic is “unlike any other script found in the modern Middle East." And unlike most scripts, it has changed very little over the centuries. Despite its enduring quality, many of the speakers in Iraq have fled to other countries since the U.S. invasion in 2003. As these speakers assimilate into new cultures, it becomes more challenging to maintain their linguistic traditions.

7. Lanna

The Lanna script
Courtesy of Tim Brookes

According to Brookes, the Lanna script was primarily used during the time of the Lanna Kingdom in present-day Thailand from the 13th century to the 16th century. It’s still used in some regions of northern Thailand, but faces stiff competition from the predominant Thai script. The word Lanna translates to "land of a million rice fields." The script is one of Brookes’s personal favorites as far aesthetics are concerned. “It is so extraordinarily fluid and beautiful,” he says. “They developed this script to indicate not only consonants, but then the consonants have vowel markings and other consonant markings and tonal markings both above and below the main letters, and so you have this amazingly joyous and elaborate writing system, and it’s like a pond of goldfish. Everything is just curving around and swimming in all these different directions.”

8. Dongba

The Dongba script
Courtesy of Aubrey Wang

Members of the Naxi ethnic minority in China’s Yunnan province have been using this colorful pictographic script for well over 1000 years. The pictures stand for tangible objects like mud, mountains, and high alpine meadows, as well as intangible concepts such as humanity and religion [PDF]. Historically, it was mainly used by priests to help them remember their ceremonial rites, and the word Dongba means "wise man." However, the script has undergone something of a revival in recent years, having been promoted by people working in the arts and tourism industries. It’s also taught in some elementary schools, and it remains one of the few pictographic scripts that’s still in use today. At the same time, Brookes says he's seen little evidence of efforts "to create a circumstance where the script is actually used in a functional, everyday fashion." With the predominant Chinese script looming large throughout much of the country, Dongba's days may be numbered.

9. Tibetan

A student writes the Tibetan script
China Photos/Getty Images

Some of the world’s alphabets and languages are endangered for political reasons. Tibetan is perhaps the best-known example of that. The Chinese government has cracked down on language instruction in recent years, with the aim of promoting Mandarin, the predominant language—although some have argued this policy comes at the expense of minority languages. In Tibet, many schools now conduct the bulk of their lessons in Mandarin, and Tibetan might be taught in a separate language course. Chinese officials put a Tibetan activist on trial in January 2018 for “inciting separatism”—partly because he criticized the government’s policies on Tibetan language education. He was sentenced to five years in prison. In general, “the story behind endangered alphabets is almost never a pleasant or cheerful one, so that’s the human rights side of it,” Brookes says.

10. Mongolian

The Mongolian script

Anand.orkhon, Wikimedia Commons // CC BY-SA 4.0

Some have likened the appearance of the traditional Mongolian script to a kind of vertical Arabic. The script traveled to Mongolia by way of a Turkic ethnic group called the Uighurs in the 1100s. Beginning with Genghis Khan, Mongol leaders used the script to record historic events during their reign. Later, when Mongolia became a Soviet satellite state, the country started using the Cyrillic alphabet in the 1940s, and the traditional script was largely cast aside. The traditional alphabet is still used in inner Mongolia and is returning to Mongolia, and the renaissance of Mongolian calligraphy has bolstered its usage to some degree. Nonetheless, it, too, remains endangered.

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