The dark origins of Valentine's Day.

Some believe Valentine's Day evolved from the Roman holiday Lupercalia

The festival, which took place in mid-February, featured Roman priests sacrificing a goat and using its hide to lightly slap women and the land, believing it would bring fertility. Some believe that the Catholic Church repurposed the pagan holiday as a Christian one by attaching it to a saint, but scholars are not certain that this is true.

Valentine's Day's namesake is unclear

Valentine, which means "powerful" or "worthy," was a popular name in the Roman Empire. Considering that, it's no surprise that there's more than one St. Valentine. In fact, three different men named Valentine were martyred on February 14, and none of them, despite some unproven legends, were ever associated with love or romance.

Check out Valentine's Day traditions from around the world

Valentine's Day is a holiday all about romance, but the way that's expressed differs depending on where the celebration takes place. This list breaks down some interesting takes on the holiday from across the globe, including mass weddings in the Philippines and Japan's gender-specific chocolate exchanges.

Poet Geoffrey Chaucer inspired the modern, romantic version of Valentine's Day

In the 1380s, the "Canterbury Tales" author wrote "The Parliament of Fowls," a 700-line poem about birds that choose their mates on St. Valentine's Day. The poem argued that romantic love—for fowls and humans alike—was an ideal, and linked the holiday with that sentiment.

The best Valentine's Day-themed horror movies

It may seem like an odd combination—a holiday centered on love and a film genre dedicated to fright—but the hyperspecific subgenre thrives on the apparent juxtaposition, along with some campy send-ups of an overly commercialized holiday.

In the 20th century, Valentine's Day became more commercialized

Historian Elizabeth Nelson notes that companies sought "to turn holidays into opportunities for selling things from candy to flowers to magazine advertisements" in the 1900s. Hallmark, founded in 1911, pushed the holiday toward elementary students, who aimed to collect cards from as many classmates as possible.

'Roses are red, violets are blue' has a long, twisting history

The earliest known use of the phrase, a stock romance form used in greeting cards, is in Edmund Spenser's "The Faery Queen" from 1590 (excerpt below). By 1785, Joseph Ritson updated the verse and connected it to Valentine's Day, creating a cliché that's still used today.

19th-century 'vinegar valentines' sometimes mocked recipients

In Victorian England, cards were sent to paramours and crushes, but they were also sometimes sent to people the sender disliked and would belittle them for their occupations or appearances. It was also expected that anyone who received a Valentine's Day card would send one in return, so there was a subgenre of responses, including rejections for unwanted suitors.

Halloween originated with the Celtic festival of Samhain

Halloween, a holiday primarily popular in the US and Canada, originated 2,000 years ago with the Celtic people. The Celts interpreted this transition as when ghosts returned to the land of the living, leading to rituals like feasts, bonfires, and wearing costumes made of animal body parts on Oct. 31.

A medievalist explains how romantic love emerged as a cultural concept

Many long-form stories written in English were originally considered "romances," a term derived from the Old French word for "the speech of the people." But changes in medieval culture, triggered by a number of 12th-century church reforms, led to a new interest in what we now consider romantic love, including a new view of marriage as a pursuit of love rather than a transaction. Those new perspectives were then reflected in the period's popular stories, including stories in Chaucer's "Canterbury Tales."

Advertisers emphasized Cupid's childlike qualities to appeal to a younger demographic

Cupid is the Roman god of desire, and was often depicted in ancient mythology as both childlike and violent. In the 1800s, however, American advertisers eager to appeal to a younger demographic leaned into the less threatening versioning, portraying him as a cherubic child.

Traditionally, a glut of unused eggs during Lent would be decorated at Easter

That's how the tradition started, at least in the more orthodox (or strict) branches of Christianity, which didn't eat meat, dairy, or eggs the whole period. By the end, there was more than could be eaten, so decorations ensued.

What is Good Friday, and why is it called 'good'?

Good Friday commemorates the crucifixion of Jesus, the darkest moment in the Christian story (which makes the name a genuine puzzle). Typical explanations say "good" once meant "holy" or "sacred," while other traditions dub it "sorrowful Friday." Christians observe rather than celebrate the day, with services, fasting, and quiet. It's always two days before Easter, sitting between Maundy (or Holy) Thursday and Easter.

A brief history of Christmas tree design

A celebration of the Christmas tree in all its festive glory. Get a glimpse into its intriguing background and the lore that accompanies it.

Early texts claim Jesus was conceived on the same date of his death

Though celebrations of Jesus’ birth weren’t formalized for several hundred years after he lived, it was more common to commemorate his death. Some early Church writers connected the presumed date of his death—March 25—with his conception, implying a birth date of Dec. 25.

July Fourth wasn't always a holiday, and its meaning has changed over time

This podcast explores how July Fourth evolved from an ordinary day into a national holiday, tracing its radical origins, the shifting interpretations of the Declaration, and how later generations claimed its language of liberty and equality.

An in-depth history of Guy Fawkes and the Gunpowder Plot

Guy Fawkes Day has been celebrated on November 5 in the United Kingdom for over four centuries, with bonfires, fireworks, and effigies. But who was Guy Fawkes, really? Learn about the Catholic radical who was a member of a group of 13 men eventually executed for their attempts to blow up Parliament and the king.

'Coral Castle,' Florida's self-built monument to a lost valentine

Latvian Ed Leedskalnin moved to the US shortly after his teenage fiancée ditched him. He quickly began work building a romantic tribute to this tragic episode via massive oolitic limestone. Working mostly at night, the Latvian cultivated an air of mystique as bystanders grew curious over his methods. Today, the castle stands as a bittersweet monument to unrequited love.

The origins of Iceland's child-eating Yule Cat legend

Iceland is a cold place, and wool production has long been a key means of surviving the climate's severity. For those Icelanders who failed to get new Christmas clothing before the holiday, their lurked a vicious, hungry cat to consume them. The centuries-old folklore is a fascinating story of social control through the tales we tell. For a dose of Christmas fear, read this wild article.

English playwright Christopher Marlowe's violent and mysterious death

According to an official coroner’s report, in 1593 a heated argument over payment for supper escalated into a physical struggle, during which Marlowe wounded a man named Ingram Frizer, who then fatally stabbed Marlowe above the right eye. Though we still don't have a definitive explanation for why Marlowe was killed, the true motive continues to be debated, with suspicions surrounding the official account. Read more here.

Day of the Dead poems skewer everyone, living or dead

The tradition of calaveras literarias, or satirical poems about death, dates back to the 20th century. They take aim at everyone, including deceased loved ones, politicians, family and friends.

The strange endurance of consuming blood for health

Blood's importance to humanity is best summarized this way: without it, we die. This importance naturally begets assumptions about its medicinal properties, many of which appear accessible through drinking or eating the fluid connective tissue. This article details the history of blood drinking, from ancient Roman gladiators to modern-day sanguinarians.

The banishment of Nian marks the origin of the Lunar New Year

After suffering for years as Nian destroys their crops and eats their children, villagers are visited by a mysterious stranger who reveals that the monster is afraid of loud noises and fire. The villagers use the information to drive Nian out, celebrating their victory every year after with fireworks, feasting, and more.

The Slavic Ded Moroz is a more secular version of Santa Claus

Atheism was long a central part of Soviet politics. One facet was an attempt to wipe out religious holidays, Christmas (and Santa) included. Ded Moroz, or Father Frost, is the Soviet version of Santa, who also travels by carriage and has a long white beard.

No one's sure why it's spelled 'sundae'

There are several different folktales explaining the origins of the popular ice cream dish and its curious name. One claims an enterprising pharmacy used chocolate syrup instead of soda, which was banned on Sundays. Another claims the dish's unique spelling was to avoid offending religious folks who might object to an unholy reference to the Sabbath.

Learn more about the history of fireworks, which dates back to an accidental invention during an alchemist's quest for information about immortality.

The Dracula character, now seen as the vampire archetype, was inspired by a seafood-induced nightmare its creator experienced.

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.

Volcanic activity may have triggered the Black Death by spewing gases that led to crop failures in Europe, thus forcing the import of grain ships with plague-infested fleas.

After the Boston Tea Party, colonists switched to coffee, which became the main morning drink for revolutionaries.

The concept of phantom limbs, the perception that amputated limbs are still present, dates back to a French military surgeon in the 16th century.

Salvador Dalí believed he was his own dead brother, who had died nine months before he was born

The name 'Silicon Valley' arose from the founding of Shockley Semiconductor Laboratory in Fairchild Semiconductor in 1956-57, founded near Stanford University in Palo Alto

The tragic Pulitzer Prize-winning image 'The Vulture and the Little Girl' (1993) generated controversy, raised concerns about ethics in photography, and eventually led to the photographer's death.

Many legends about George Washington, including his supposed wooden teeth and the story of cutting down the cherry tree, lack evidence.

Georgia O'Keeffe's flower paintings are often assumed to be sexual, though the artist claimed she was simply interested in highlighting the beauty of flowers that most people neglect

Stanford built a Google Maps for the Roman Empire, revealing how much it cost to travel in the ancient world

For centuries, it was common to sleep in two shifts: a few hours at the beginning of the night, and a longer period beginning around midnight

The Brothers Grimm were lawyers before they were storytellers, but became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.

El Niño, Spanish for 'the boy,' was named after Jesus Christ because the phenomenon resembled the weather changes observed around Christmastime.

20,000 letters to the advice columnist 'Dear Abby' provide insight into prevailing sex, religion, and LGBTQ fears, anxieties, and concerns from the 1950s onward.

In 1915, workers recovered a submarine-like vessel from the Chicago River, prompting fears of German espionage

Exploring the Larry Bird punch that almost changed March Madness

During the French Revolution, a botanist's letter asking about "dear Rhus" (poison ivy) was intercepted, leading authorities to suspect he was conspiring with the Russians.

The distributor behind 'Rocky Horror' pulled the film from its scheduled national release, believing it would be a failure, though it eventually amassed a dedicated fanbase through midnight showings, a trend that continues over 50 years later.

Read a deep dive on the 'all-purpose healing' peptide BPC-157.

US intelligence allegedly pursued more than 600 schemes to assassinate Cuban revolutionary Fidel Castro.

Art theft is the third-largest source of criminal revenues worldwide, thanks in part to the subjective nature of valuing a work of art.

The term 'algorithm' originated from the Latinized name of al-Khwārizmī, a 9th-century mathematician whose works introduced Arabic numerals and the decimal-based numeral system to Europe and whose treatise 'Al-Jabr' gave algebra its name.

SpongeBob exemplifies Aristotle's philosophy for living well because he understands that happiness doesn't come from external factors like money, recognition, or power.