Why Do We Have Summer Vacation?

  • Children lounging in field
Children lounging in field
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Author Nicole Villeneuve

June 18, 2025

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Summer vacation has been an integral part of American family life for more than a hundred years. This season of leisure is primarily due to one thing: School’s out. But why is there no school in summer? You may assume it’s a holdover from the country’s agrarian days, when children were required to help out on the family farm. But the summer vacation we know today actually had more to do with urban health concerns and public policy than with hay bales or cornfields. Here’s a look at the origin of summer vacation.

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The Days of Sporadic Schooling

In the early 1800s, there was nothing even close to a standard school calendar in the United States. Communities ran schools as best suited their needs or abilities, leading to a very loose patchwork of local schedules. Rural schools were typically open in winter and summer in order to accommodate busy farm seasons that required planting in the spring and harvesting in the fall. (That said, even in the summertime there was plenty of farm work to do, and school attendance was often low.) City schools worked differently. Many operated almost year-round, taking only a short break each quarter. And the inconsistencies didn’t end there: Even within a single county, schools were extremely localized and their operational calendars could be starkly different.

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Why Do We Call It ‘History’?

  • Ancient Greek historian
Ancient Greek historian
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Author Bess Lovejoy

June 18, 2025

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The modern English word “history” comes partly from the Latin historia and partly from the French storie (or estoire), but those terms both trace their roots back to the same place. Not coincidentally, that place is one of the bedrocks of Western civilization: ancient Greece.

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Going back about as far as we can, the word “history” can be traced to the ancient Greek verb οἶδα (heda), meaning “to know.” From there, the Greek ἵστωρ (histōr) arose, which had a variety of meanings depending on the context. As a noun, it could mean “wise man,” “judge,” “witness,” or simply “one who knows.” As an adjective, it meant “knowing” or “learned.”

The Greek word historia evolved from that histōr root. It originally meant “a learning or knowing by inquiry,” “an account of one’s inquiries,” or simply “inquiry” or “narrative.” That word was borrowed into Latin (also as historia), where it meant “narrative of past events, account, tale, story.” Interestingly, although historia was borrowed from Latin into Old English as stær (or ster or steor) to mean “history, narrative, story,” our modern English word “story” comes from the French storie or estoire

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What Did U.S. Money Look Like in the 1800s?

  • Greenbacks, circa 1863
Greenbacks, circa 1863
Credit: Sheridan Libraries/Levy/Gado/ Archive Photos via Getty Images
Author Timothy Ott

June 12, 2025

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While the Coinage Act of 1792 established the United States Mint and the dollar as the unit of currency for the fledgling nation, it was quite some time before a fully standardized monetary system took root. In the meantime, people in possession of valuable metals continued to use them for transactions, local banks offered their own currency, and foreign money continued to flow until being banned as legal tender in 1857.

Despite this relative instability, Americans today would largely recognize the various forms of currency that exchanged hands in the 19th century, even if the designs and denominations of the coins and paper bills often differed from those in circulation today. Here’s a glimpse at what money looked like as the United States came of age.

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Gold Coins

The 1792 Coinage Act stipulated that all U.S. coins were to feature a depiction of the goddess Liberty on the front, while gold and silver coinage also required the display of an eagle on the back. As a result, the gold eagle ($10), half-eagle ($5), and quarter-eagle ($2.50) coins that went into circulation in the 1790s were all engraved in this fashion through the 1800s. 

By the mid-19th century, the discovery of gold in California ushered a new wave of the precious metal into the economy, resulting in the creation of the new $1 piece, the $20 “double eagle,” and the octagonal $50 unit, aka the “slug.” Unusual denominations from this era include the $3 coin, which featured Liberty in a Native American headdress, and the $4 “Stella,” which displayed a five-pointed star instead of an eagle.

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How Did People Prevent Sunburn Before Sunscreen?

  • Woman shading herself
Woman shading herself
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Author Nicole Villeneuve

June 12, 2025

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Today, being outdoors on a hot, sunny day usually means traveling with a few sun-blocking essentials: sunscreen, sunglasses, and a hat. Though our knowledge of sun damage is relatively recent — it wasn’t until the 1800s that scientists began to understand ultraviolet rays’ harmful potential — humans have always tried to avoid the unpleasant sting of too much sun. Yet the first commercial sunscreens didn’t arrive until the 20th century — before that, people had to find other ways to prevent getting a sunburn.

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Clothing and Shade

While it’s hard to pinpoint exactly when people first began actively protecting themselves from the sun, evidence suggests that even in prehistoric times, attempts were made to cover the skin both to stay warm in cold weather and also to block the heat of the sun. People covered themselves with animal hides, plant fibers, and later, woven textiles

By at least 3000 BCE, some societies started to rely on parasols and umbrellas not only as accessories but also for shade; in ancient Egypt, they were often made out of palm leaves or feathers. Egyptians also wore lightweight, loose-fitting linen garments and headdresses to shield themselves from the sun. In ancient Greece, people commonly wore wide-brimmed hats such as the petasos, protecting their faces and necks from direct sunlight.

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What Did Ancient People Dream About?

  • Triptych depicting Constantine’s dream, 312 CE
Triptych depicting Constantine's dream, 312 CE
Credit: Henry Guttmann Collection/ Hulton Archive via Getty Images
Author Bess Lovejoy

June 5, 2025

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For the ancient Greeks, Romans, and folks in other cultures, dreams were far more than idle nighttime fancies. They were powerful, often sacred experiences that shaped lives, politics, religious practices, and art. 

While ancient people likely dreamed about many of the same themes we do today — love, fear, death, power, the divine — their dreams were widely seen as significant messages, often believed to come directly from gods or supernatural forces. Ancient dreamers sought meaning in their visions, often finding answers to illness, moral dilemmas, or matters of state, and they acted on their dreams with great seriousness. Here’s a look at what people in ancient times likely dreamed about, and what they believed those visions meant.

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Divine Messengers and Prophecy

One of the most common types of dreams in antiquity featured divine or semidivine figures delivering a message — what later Roman thinkers such as the scholar Macrobius classified as “oracles,” and later scholars have called “epiphany dreams.” These dreams usually involved a god, ancestor, or venerable figure announcing future events or prescribing actions to take.

A prominent example is Penelope’s dream in Homer’s Odyssey, where she sees an eagle slay her flock of geese. The eagle speaks, revealing himself as Odysseus and foretelling his return and vengeance. In another example, from ancient Sumer, King Eanatum I dreamed that Ning̃irsu — the Sumerian god of thunderstorms and floods — told him he would triumph in a war. And in Egypt during the 15th century BCE, a deity told Prince Thutmose IV that he would become pharaoh if only he freed the Sphinx from the sand engulfing its body.

In some early Christian writing, dreams offered opportunities for moral instruction, although it can be hard to distinguish between sleeping dreams and what we’d now be more likely to call visions. But it wasn’t unusual for dreams to influence early religion: Ptolemy I Soter, one of Alexander the Great’s generals, had a dream of a giant statue that led him to found the cult of Serapis.

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How the Postal Service Created the ZIP Code

  • Postman delivering letter
Postman delivering letter
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Author Timothy Ott

June 5, 2025

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Even with the decline of letter writing in the digital age, the ZIP code remains an American institution, a neat five-digit number that caps an address and, like an area code, can serve as a point of pride and prestige.

Given the ZIP code’s place as an oft-used and universally recognized symbol, it may come as a surprise that the ZIP, short for “Zone Improvement Plan,” isn’t all that old. The system was enacted on July 1, 1963, within many of our lifetimes and just a few months before another famous entity, the Beatles, also arrived in the United States.

But unlike the mop-topped quartet, the five-digit zoning plan wasn’t immediately welcomed by Americans. Here’s a look at how the ZIP code came to be, and ultimately overcame a bumpy start to emerge as a signature accomplishment of the United States Postal Service.

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An Early Zoning System Came Out of World War II

Like many innovations, the ZIP code’s origins can be traced back to World War II. At the time, the Post Office Department, as the U.S. Postal Service was then called, was dealing with the loss of personnel to military duty, specifically the departure of experienced sorters who could properly funnel letters and parcels marked with incomplete addresses.

As a result, in 1943, the department assigned one- to two-digit zone numbers to more than 100 high-density urban areas across the country to help make sorting for these areas more efficient. The numbers were to be written on the address of the recipient after the city name, such as “Indianapolis 24, Indiana.”

Although the zone numbers provided some organizational relief, they only papered over the problem of keeping up with the ever-growing volume of mail. Fueled by the country’s postwar population and economic boom, the number of individual pieces of mail jumped from 33 billion in 1943 to 66.5 billion in 1962. By the latter date, a letter was handled by an average of eight to 10 postal employees, increasing the possibility of human error.

The issue wasn’t going unnoticed by the department’s employees. In 1944, a prescient postal instructor named Robert Moon sought to get ahead of the volume problem with his proposal of splitting the country into a network of regional processing centers, each marked by a three-digit code. Nine years later, another inspector, H. Bentley Hahn, completed a six-year study of the department’s outdated operations with a report titled “Proposed Reorganization of the Field Postal Service.”

But despite the modernization efforts of Postmaster General Arthur Summerfield, who introduced the country’s first automated post office in Providence, Rhode Island, in 1960, the department was still struggling to meaningfully address its problems as it faced down a new decade.

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Why Babies in Medieval Paintings Look So Weird 

  • Madonna and child, circa 1480
Madonna and child, circa 1480
Credit: Heritage Images/ Hulton Archive via Getty Images
Author Bess Lovejoy

June 5, 2025

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Spend any time gazing at medieval European paintings, and one question tends to emerge: What is going on with those babies? Far from the sweet, chubby cherubs we might expect to see, these infants often resemble balding middle-aged men, complete with wrinkled foreheads and dour expressions. What could possibly explain this bizarre artistic choice? To understand, we have to dive into how European art — and the perception of children — evolved from the Middle Ages to the Renaissance.

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Religion Influenced Art

The unsettling “man-baby” of medieval art wasn’t a mistake or the result of a lack of skill. These depictions were intentional, shaped by artistic and religious ideas of the Middle Ages (roughly defined as between the fifth century and 13th century). Chief among these ideas was the concept of the homunculus, Latin for “little man,” which influenced how artists portrayed Jesus Christ as an infant. In many medieval works, baby Jesus appears with a full adult face, sometimes even showing signs of male-pattern baldness. The idea was that Jesus, being divine, was fully formed and unchanged from birth (a notion referred to as “the homuncular Jesus”). This theological concept seeped into broader portrayals of children, especially since the majority of child depictions in medieval art were religious commissions — portraits of Jesus or the occasional saintly infant.

As a result, artistic conventions leaned heavily toward depicting children as miniature adults. There was little interest in anatomical accuracy or realism. Instead, medieval artists followed established norms that prioritized symbolic meaning and spiritual messaging over lifelike representation. These conventions flattened individuality; adults and children often looked similarly stylized.

It also didn’t help that painters in this period lacked full artistic freedom. Many were working within strict church guidelines or copying earlier models, so even if they had wanted to create more accurate depictions, they weren’t supposed to do so. This lack of realism means that children in medieval paintings are often difficult to recognize as such. Some appeared disproportionately large or small, while others simply looked like shrunken grown-ups. 

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Why Did People Used To Wear Monocles? 

  • Joseph Chamberlain wearing monocle
Joseph Chamberlain wearing monocle
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Author Tony Dunnell

May 27, 2025

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In the world of eyewear, few accessories have captured the imagination quite like the monocle. Widely regarded today as an eccentric throwback from an earlier age, the monocle began life as a fairly simplistic and imperfect device for correcting eyesight. But something odd happened during the 19th century: The unassuming corrective lens began taking on an entirely new significance as a powerful symbol of class, intellectual prowess, and cultural identity. 

But why did this simple optical device evolve into a status symbol? And why did people start wearing monocles in the first place, when spectacles — those of the two-lens variety — had been around since the 13th century? Here’s a close look at why people used to wear monocles, and why the curious eyepiece ultimately went out of fashion. 

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The Origins of the Monocle

The origin of the monocle is somewhat blurry. It likely developed from the “quizzing glass,” which was a magnifying lens on a handle that was held up to the user’s eye to aid in reading or inspecting objects. The monocle, of course, did away with the handle altogether, and was instead held in place by the eye socket itself. 

Monocles helped with reading small print and other tasks requiring near vision. They also had the benefit of allowing both hands to be used freely (unlike the quizzing glass) while also being easy to carry, slipping comfortably into a top pocket. 

Monocles, however, have one obvious issue: They correct vision in only one eye. This might be fine for someone with anisometropia, in which only one eye needs correcting, but virtually all monocle users require optical correction in both eyes

This issue was being discussed by medical practitioners as far back as the early 1800s — and their comments were often critical. An anonymous German treatise published in 1824 stated, “The monocle with which a single eye is used must be avoided because it disturbs the balance of binocular vision.” The same year, London optician William Kitchener warned, “This pernicious plaything will most assuredly in a very few years bring on an imperfect vision in one or both eyes.” 

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The Most Popular Medieval Names

  • Durham Liber Vitae, circa 840 CE
Durham Liber Vitae, circa 840 CE
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Author Kristina Wright

May 27, 2025

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The Middle Ages weren’t just shaped by monarchs and wars — they were lived by everyday people whose names appear in the records they left behind. Parish registers, royal charters, tax rolls, and literature give us a glimpse into the history of common names in medieval England and other parts of Europe and what they meant to the people who carried them.

Some of the most valuable insights about what people were called, and why, come from medieval books created specifically to record names. One example is the local Liber Vitae (Latin for “Book of Life”), which listed individuals — often clergy or benefactors — remembered in the prayers of religious communities. These books were relatively rare and typically associated with major monastic centers in England, such as Durham and Winchester, where they served both spiritual and administrative purposes. The Durham Liber Vitae, which was updated over a span of 700 years, documents a wide variety of Anglo-Saxon and Norman names.

Other sources of medieval names, such as the 14th-century York Registers, document naming trends among the clergy and nobility. Together with legal records and monastic rolls, these texts reveal how names reflected faith, status, region, and tradition. The names below give us a look at how people in the Middle Ages expressed their religious beliefs, honored their ancestors, and signaled their social standing — all through the names they gave their children.

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The spread of Christianity throughout medieval Europe had a tremendous influence on naming practices. Biblical names and those honoring saints were popular — and in many regions, they were even required for baptism. Here are some of the most common examples.

John
John, the Latin form of the Greek name Joannes, was one of the most widely used male names in medieval Europe. It originates from the Hebrew name Yochanan, meaning “God is gracious,” and gained prominence through early Christian texts and the popularity of biblical figures such as John the Baptist and John the Apostle. The name was embraced by kings, popes, clergy, and commoners, making it a universal choice across social classes. There were many variations of this popular medieval name, including Johan (Germanic and Scandinavian regions), Jean (French), Giovanni (Italian), and Juan (Spanish).

Thomas
Thomas, the Greek form of the Aramaic Ta’oma’, meaning “twin,” became a common name throughout medieval Europe due to its biblical roots — most notably St. Thomas the Apostle. Its popularity grew further after the 12th-century martyrdom of St. Thomas Becket, archbishop of Canterbury. The name was used widely by both clergy and commoners. Medieval variations included Tommaso (Italian), Tomás (Spanish), and Thomasse (French).

Margaret
Margaret was a popular name for girls across medieval Europe. It originates from the Greek margaritēs, meaning “pearl,” and entered Latin as Margareta through early Christian usage. The name was associated with purity and virtue, especially due to the widespread veneration of St. Margareta of Antioch and St. Margaret of Scotland. Some of the medieval variations of this beloved name included Marguerite (French), Margherita (Italian), Margarita (Spanish), Margarethe (German), and Margit (Hungarian). 

Agnes
Agnes comes from the Greek hagnē, meaning “pure” or “chaste.” It was a classic name among Christian families, inspired by St. Agnes of Rome, a young martyr celebrated for her steadfast faith and innocence. Her story made the name especially popular among parents seeking a model of virtue for their daughters. Medieval variations included Ines (Spanish and Portuguese), Agnès (French), and Agnese (Italian).

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5 Toxic Foods People Used To Eat

  • Victorian-era restaurant
Victorian-era restaurant
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Author Timothy Ott

May 27, 2025

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From our modern vantage point, the culinary options of bygone cultures are sometimes difficult to comprehend. It seems that hungry people gobbled down anything they could get their hands on, including dormice (rodents), beaver tails, and fish bladder jam.

But while some of the choices seem unusual in hindsight, we can at least grasp their nutritional value. Other foods, however, were just downright dangerous to the human digestive system, and certainly wouldn’t have been on the menu had the consumer been aware of the consequences. Here are five toxic foods that people unwittingly used to eat.

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Stone Age Fish

Offering a rich source of vitamins, protein, and fatty acids, seafood is generally considered among the healthiest cuisine to eat — unless, of course, the specimens being consumed contain sky-high concentrations of heavy metals. Such was the case with the Atlantic cod and harp seals that comprised the meals of Stone Age settlers in northern Norway’s Varanger Peninsula around 5000 to 1800 BCE. 

According to a recent study, cod bones from the settlement contained levels of cadmium up to 22 times higher than contemporary recommended limits, while seal bones showed similar dangerously elevated levels of lead. While it might seem strange that wildlife came with the risk of carcinogens in an era well before industrialization, the study authors suggest this was the result of climate change. It’s possible the thaw from the last ice age (between about 120,000 and 11,500 years ago) produced rising sea levels that carried soil containing the potent minerals into the water.

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