The word 'vampire' appeared in the English-speaking world in the 1730s

One doctor argued vampires were based on a real disease

At a conference in 1985, Canadian biochemist David H. Dolphin posited that stories of vampires and werewolves had a real-world origin. He argued that porphyria could have caused sufferers to seek out blood, as well as experience light sensitivity and an aversion to garlic. More than one article in the 1990s discredited this take.

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

Horror evolved from Gothic literature

Although creepy tales can be found in nearly every folk tradition, the roots of modern horror can be traced back to Gothic literature, which focused on the battle between humans and unnatural, evil forces.

Where did zombies come from?

This 17-minute video dives into the origin of modern-day zombies. Zombies can be traced to early West African spiritual practices, specifically Vodou. Vodou evolved from the mixture of beliefs held by enslaved Africans in the French colony of...

Blood evolved many times over hundreds of millions of years

The earliest evidence of a blood-like substance comes from ancient arthropods, which appear to have had copper-based blood. In the 500 million years since then, some creatures have grown to rely on other variants, such as humanity's iron-based blood.

Vampire bats are the only mammal to feed exclusively on blood

Scientists believe their ancestors may have eaten parasites and insects off larger animals until vampire bats started feeding directly from those animals. Colonies work together to stay fed, as a vampire bat can die without just two days of eating.

The human cost of creating medieval monsters

The concept and creation of monsters have been used since time immemorial to communicate social norms and the consequences of breaking them. Some so-called monsters were judged as such solely due to having features that would be considered birth defects in modern times. This in-depth article explores the human cost of creating medieval monsters, many of whom were defined by a physical appearance that deviates from the expected.

Black cats got their frightening reputation in the Middle Ages

Though many cultures in Africa, Asia, and Europe recognize black cats as symbols of good fortune, they're associated with bad luck and America's spookiest holiday. Their association with evil didn't gain traction until the 13th century, as religious figures and European folklore drew connections between cats, Satan worshippers, and witches.

A prisoner at the haunted Corvin Castle in Romania helped inspire Dracula

The dungeon in Corvin Castle has hosted numerous ill-fated prisoners and many unsettling occurrences. One of its most famous former residents is the cruel ruler Vlad III, the inspiration for the character of Dracula. Listen to the eerie tales of the dungeon where psychological torture and extreme violence took place.

The virus was officially described for the first time in 1789

Michael Underwood, an English physician and surgeon, was the first to describe the disorder, noting it caused disability in the lower extremities in children. Large-scale outbreaks of the disease were not observed until the late 19th century.

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

Phantom limbs were first documented in the 16th century by a French military surgeon

Ambroise Paré, the military surgeon, observed this phenomenon among soldiers who'd lost limbs, yet the term wasn't formally coined until hundreds of years later, by Silas Weird Mitchell, an American Civil War surgeon.

The word ‘fantasy’ wasn't used to describe the genre until the 20th century

The word—at least as a word used to describe fiction—didn’t appear in the Oxford English Dictionary until 1949. Scholars believe that’s due to the arrival of the Magazine of Fantasy and Science Fiction, an influential publication, and the rise in fantasy’s popularity following World War II.

Ghosts didn't say 'boo' until the 19th century

The word derives from Scotland in the early modern era and was often used to assert oneself. Eventually, it became a way to startle someone, and by the 19th century, was the go-to utterance of literary spirits.

Europe’s first universities emerged from medieval church school

The modern university can be traced back to the Middle Ages, when schools in Italy, France, and England initially trained clergy before expanding to include lay students. By the 10th and 11th centuries, they taught law, medicine, and theology across Europe.

The word ‘vacation’ first appeared in ‘The Canterbury Tales’

The word—as the Middle English “vacacioun”—can be found in “The Wife of Bath’s Tale,” one section from Geoffrey Chaucer’s famous 14th-century text. Until the mid-1800s, the word mostly referred to a time when schools and public buildings were “vacated.”

The term ‘mortgage’ was born out of the French word for ‘dead pledge’

Borrowing money to buy a house has been a global practice since the Romans in the fifth century BCE. But before the mortgage, there was the “dead pledge,” which labeled the property as “dead” to the borrower until they paid off their loan to the lender.

Vikings had pretty bad teeth

Vikings, the medieval marauders of northern European land and seas, were actually famous for their excellent hygiene. Despite this, evidence from Viking burial grounds points to one exception: their teeth. Roughly 60% of those Vikings studied had at...

Englishmen in the 17th century mixed their blood into wine to show devotion

In order to demonstrate their love for a woman, some young Englishmen would stab themselves in the arm and mix the blood into their wine. They'd then toast the object of their affection and drink to their honor.

The word 'influenza' comes from a 15th-century Italian belief in the stars

In Renaissance Italy, epidemics were thought to result from the influence of natural disasters or celestial bodies. The illness was named "influenza", meaning “influence” in Italian.

12th-century English monks claimed discovery of King Arthur's bones

The medieval legend of King Arthur and his Queen, Guinevere, is one of the most popular to endure into the modern era. The legend regularly evolved during the Middle Ages, as is seen in this story where a historian from King Henry the Second's court claims the bones of Arthur were discovered at Glastonbury Abbey.

The story of Sweeney Todd was first told in 1800s penny dreadfuls

The demon barber of Fleet Street made his first print appearance between the pages of penny dreadfuls, cheaply made serials filled with grisly tales and sold for a single penny. The tale of Sweeney Todd was published in 18 parts over the course of 18 weeks between November 1846 and March 1847. The series was expanded into 92 parts and later gathered into a single volume published in 1850.

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.

The lost medieval habit of 'two sleeps'

While most people accept a single seven-to-nine-hour nightly slumber is ideal, the approach is a relatively modern idea. For centuries, interrupted sleep was the norm, with historians uncovering descriptions of two periods of sleep during the normal 24-hour cycle.

The bubonic plague spread in three waves over 600 years

The Black Death refers to the first wave of the plague, which swept through Europe in the 14th century and killed 25 to 50 million people. Caused by the bacterium Yersinia pestis carried by fleas (often on rats), the human toll was roughly one-third of Europe's population at the time.

The first horror movie is believed to be George Méliès' 1986 short 'The Haunted Castle,' which pioneered the use of special effects

Near-death experiences have been reported across cultures across for millennia

This collection of ten of the earliest recorded NDEs gives an idea of how pervasive the phenomenon really is. Stories range from ancient Greek philosopher Plato telling the story of a soldier named Er to a first-century Japanese monk who claimed to have visited both heaven and hell.

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.

How the Guy Fawkes mask became iconic

The Guy Fawkes mask, popularized by the film "V for Vendetta," is now one of the most iconic visual symbols in recent history. Learn about the mask's origin and adoption by protest movements in this brief piece. The movie presents an anonymous,...

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

Watch how viruses like Ebola can spill over from animals to humans—and vice-versa.

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

The first robot in literature may have been a 'mechanical man' in 1907's 'Ozma of Oz,' a book in L Frank Baum's 'Wizard of Oz' series.

The American cockroach is actually from Africa, an apparent hitchhiker aboard ships carrying enslaved people, with evidence suggesting the bug may have arrived in the New World as early as the 1600s.

The first line of 'immortal' human cells, which can divide indefinitely and are used in scientific research, was nonconsensually taken from a Black woman.

Poison ivy was sent to Europe in the 1600s as an exotic, ornamental oddity, where it was purposefully grown in the English royal gardens at Kew, the Faculty of Medicine in Paris, and a few other locations.

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

The history of many kitchen appliances involves unexpected discoveries and applications, including wartime radar turned hamster defroster and replacing an 'ice king' with heat-stealing boxes.

Some Pokémon have been named after real and fictional organisms, while some real-world species have been named after Pokémon, such as Chilicola charizard and Binburrum zapdos.

Elk Cloner, the first computer virus to spread in public, was written as a practical joke by Richard Skrenta, a Pittsburgh high school student.

The word 'jazz' evolved from 'jasm,' 19th-century American slang for 'energy'

Graffiti dates back to at least ancient Pompeii, where citizens scrawled messages to one another on public walls

Budweiser stores yeast derived from the original 1800s strain in a secret bunker, which only the Head of Yeast Management can access—not even the CEO

Venture capital is a form of funding provided to early-stage companies with high growth potential, typically in exchange for an equity (or ownership) stake

Browse a detailed visual analysis of over 200,000 similes—comparisons that often use 'like' or 'as'—from popular fiction to see how frequently writers the same idiomatic expressions.

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.

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

Trace how the Bill of Rights, inspired by centuries of political theory, took shape between 1774 and 1789.

Most of the observable universe's volume consists of voids and supervoids—enormous regions of space with little to no galaxies, stars, or light.

Existentialist writer Jean-Paul Sartre coined the famous phrase 'Hell is—other people' in his play 'No Exit'