Meet Clever Hans, the 1900s horse that was believed to be able to solve math equations and read German

Early 20th-century debates about horses with 'paranormal mathematical abilities' helped shape modern approaches to psychological research.

Lady Wonder, the horse with supposed clairvoyant powers

Lady Wonder became widely known as a horse that shared her special powers by spelling out words by using blocks with letters. She reportedly helped solve the case of a missing young boy while also offering advice and sports predictions.

Personality tests, like Myers-Briggs Type Indicator, feel accurate because humans tend to accept generic descriptions of themselves that include flattering statements—a psychological phenomenon known as the Barnum effect.

Jim Henson and his creative team constructed several optical illusions to make the Muppets appear as though they walked through the real world.

The Hans Niemann scandal rocked chess in 2023

In 2022, GM Hans Niemann was accused by Magnus Carlsen of cheating—a controversy that led to an internal Chess.com report alleging Niemann "likely cheated" more than 100 times in online games.

The science of optical illusions

The human brain has developed cognitive shortcuts to help us navigate in a world where our visual senses are constantly bombarded of information. But these shortcuts can also be exploited, tricking the brain into telling us something is happening when it really isn't. This short video unpacks the neuroscience behind some of the most common (but perplexing) optical illusions.

How Seabiscuit's DNA made him a winner

Seabiscuit's sudden success in the sport has been framed as a classic against-the-odds sports story. One Binghamton University molecular physiologist wanted to go a bit deeper, though, to see how much genetics played a role in the horse's legendary career. Using the horse's silvered hooves, his research team discovered that Seabiscuit's genotype was typically associated with late bloomers, a finding confirmed by the horse's track record.

The Hodag was a mythological animal—part reptile, part mammal, with spikes running down its back—invented by a 19th-century Wisconsin lumberjack-turned-con-artist who claimed he'd slain one after it attacked a child.

In 1898, Nikola Tesla wowed a crowd by controlling a boat with no visible connection

Some onlookers thought it was a trick, such a a monkey being inside the boat, rather than mind control or some other metaphysical phenomenon. In reality, Tesla was pioneering radio waves, proving wireless control was possible.

Can animals understand fairness?

Academics have long wondered if fairness is solely a concern of humans. In the largest meta-analysis to date, UC Berkeley researchers tested whether monkeys felt jealousy after receiving unequal rewards. The patterns showed low evidence for inequity aversion and instead frustration due to their expectations not being met by humans. These findings suggest that pursuing fairness and equality is uniquely human.

Listen to audio clips from Hoover, a harbor seal named after its insatiable appetite, who learned to say English phrases such as 'hello there' and 'come over here.'

How math whizzes exploit sportsbooks

Chris Dirkus is a professional sports bettor who approaches the hobby as a math problem, not from a fan's perspective. He focuses on mispriced odds in popular games where many fans are betting for high liquidity. He's one of a rare segment of sports bettors exploiting slow models and human mistakes.

August A. Busch, Sr. was gifted a six-horse Clydesdale hitch to celebrate Prohibition’s end

This helped reveal the marketing power of a horse-drawn beer wagon, so it invested in a second six-horse Clydesdale hitch. The Clydesdales soon went to New York, where they drew a crowd of thousands en route to the Empire State Building. Anheuser-Busch even gifted a case of Budweiser to New York Governor Alfred E. Smith in thanks for his help in the fight against Prohibition.

One man in Germany answers a large amount of Santa's mail

There are a few places in the world where much of Santa Claus's mail ends up, often because their name includes the jolly man's moniker. One of those places is Nikolausdorf, Germany, where Hubert Weddehage, a local government employee, has responded to Santa's mail for over 50 years.

Harvard drowned rats for this?

Harvard's 1950s rat study was ethically questionable, but scientifically profound. One rescue attempt made rats swim 40x longer. The finding: hope isn't poetic, it's biological.

Claims about 'Twenty-One' weren't taken seriously until other quiz shows were exposed

Contestant Herb Stempel alleged that “Twenty-One” was fixed after his loss to Charles Van Doren, saying that everything on the show was “carefully choreographed,” though his claims were dismissed as mere bitterness. In truth, Stempel had been promised a network job if he went along with the con and became outspoken when it didn’t materialize. Van Doren, meanwhile, became a celebrity, donning the cover of Time magazine.

In the 1980s, excerpts from fake diaries of Adolf Hitler were published in a prominent German magazine

Excerpts from the diaries were published in other publications around the world, like The Sunday Times, despite uncertainty about their authenticity. After forensic analysis, the diaries were proven to be fake. The diaries were produced by Konrad Kujau, a petty criminal who frequently produced counterfeits.

How a competition honoring a king's birthday uncovered history's first chaotic system

A committee established a contest for King Oscar II's 60th birthday, featuring four unsolved problems in mathematics, including one on proving the stability of a system of more than two objects held together by gravity. Focusing on three celestial objects, Henri Poincaré won the prize for his proof, which he later learned was incorrect and, upon correcting it, instead proved these systems to be unstable.

Data suggests the typical horse produces over 12 horsepower—a unit of measurement for the rate of work done that was conceived as a marketing tool to communicate steam engine performance.

The belief that classical music enhances intelligence is mostly incorrect

"The Mozart Effect" was based on a 1993 study by psychologist Francis Rauscher. Rauscher played a Mozart Piano Sonata for college students and then assessed their spatial reasoning, finding it improved for 10 to 15 minutes. The media ran with a simpler story: listening to classical music made you smarter.

Using scientific bets, Hawking challenged and highlighted major physics ideas

Hawking famously placed wagers on high-stakes questions in theoretical physics—such as the Higgs boson—for fun and to draw attention to science. When Hawking lost a bet about Cygnus X-1 being a black hole, he paid up with a magazine subscription.

Researchers once thought Stonehenge functioned as a precise astronomical computer

In the 1960s, scientists used early computers to analyze the stone layout at Stonehenge, arguing it could predict eclipses and other celestial events. This BBC Sky at Night Magazine piece explains how the theory arose—and why scholars now doubt it.

Humans can track smells on the ground quite well—our ability to crawl is a limiting factor

As part of a scientific bet, neurobiology researchers dragged a chocolate bar across the grass and sought to see if a human could track it—she could. This led to a more in-depth experiment on human olfactory capabilities and behavior when other senses were blocked.

The global horse market is worth about $400B

In this podcast episode from a new series on horses, Freakonomics explores the market around buying and selling some of the world's top sport horses, and the nebulous forces that make them so valuable.

One pop-culture historian fooled the nation with a fake origin story of April Fools' Day

In 1983, Joseph Boskin, a professor at Boston University, was interviewed by the Associated Press to discuss the history of April Fools'. Boskin shared a made-up story about a jester who took over Rome for a day and proclaimed that April 1 would henceforth serve as 24 hours of silliness. AP published the fib about "King Kugel," creating buzz and confusion for news outlets around the country.

Ray Bradbury said he was inspired to pursue writing after meeting a magician named Mr. Electrico, but scholars have never been able to confirm the story.

Watch this octopus win every single Escape Room challenge

Octopuses are famously intelligent, solitary creatures covered in hundreds of chemical-sensing suckers. They're also pretty fascinating pets, and even enjoy playing. The crew at OctoLab put one of its more playful mollusks into four different Escape Room-like cages to see how long it would take for it to escape. Watch this video to see the brilliant, if a bit unsettling, methods the animal uses.

One prankster started a movement to clothe animals in the mid-20th century

G. Clifford Prout founded the Society for Indecency to Naked Animals, saying that animal nudity was rude and immoral. The campaign continued for years until CBS employees realized Prout was actually a comedian named Buck Henry.

Some Nobel laureates have expressed beliefs in pseudoscience after winning

Examples of the phenomenon, known as Nobelitis or Nobel disease, include promoting psychic research, harmful practices like eugenics, and seeing talking raccoons. Increased external pressures after a win and a greater spotlight may contribute to developing or exposing these beliefs.

The creator of Sherlock Holmes published a book claiming fairies were real

In 1917, two young girls took photos of one another appearing to interact with fairies and a gnome. Sir Arthur Conan Doyle, author of the Sherlock Holmes books and a fervent believer in spiritualism, published the photos in a magazine and asked the girls to recreate them, which they did. Conan Doyle went on to write a book about the fairies. In 1983, decades after his death, the girls admitted the photos had been faked.

Computer pioneer Alan Turing was also an elite runner

Alan Turing is credited with helping to found modern computer science, in addition to cracking the Nazi code known as Enigma. Beyond these world-historical achievements, the British mathematician also nearly represented his country in the Olympics in the marathon, running just 11 minutes slower than the eventual gold recipient at the 1948 games. Read more on this lesser-known aspect of the man here.

Mathematicians often solve problems using wordless mental processes

It's a common technique among expert mathematicians, where thinkers rely on intuition, blurry perceptions and subconscious work—no writing, no formulas. The state is distinct from daydreaming, and often relies on sudden illuminations stemming from extended periods of subconscious reflection.

An impostor convinced Frank Shorter he’d lost the gold

The 1972 marathon at the Munich Games featured a dramatic finish, thanks to someone posing as a competitor entering the stadium before Shorter. The stunt confused Shorter and the crowd (and enraged the American television announcers) as he entered the final stretch.

Searching for Albert Einstein's stolen brain

Within moments of Einstein's 1955 death, someone reportedly ferreted away the 76-year-old genius's brain. Decades later, a reporter's editor told them to solve the case. This 64-minute podcast episode follows the work of Steven Levy, the reporter who ultimately tracked down Einstein's brain, which had been sliced and stored in slides, goo, and a cardboard box in a scientist's office.

Houdini recalls how he became 'Handcuff King'

Illusionist Harry Houdini rose to fame through his many escapes, like from the handcuffs slapped onto his wrists by Los Angeles police in 1899. In this 1907 Los Angeles Herald article, Houdini recalls some of the many times he's thwarted attempts to...

Fed up with difficult audiences, Arnold Schoenberg started a private concert club that prohibited audible reactions.

Cygnus X-1 helped scientists confirm black holes are real and measurable phenomena

The 1964 discovery of Cygnus X-1 provided the first strong candidate, but it took decades—and a famous bet between Stephen Hawking and Kip Thorne—before scientists were certain it was a black hole. Hawking's thumbprinted concession was delivered after breaking into Thorne's office.

Patient H.M. revealed that the hippocampus was responsible for memory formation

Henry Molaison became a landmark case in psychology after surgery removed large portions of his hippocampus, leaving him unable to form new memories. Upon his death, Molaison's brain was sliced into 2,401 sections and digitized for research.

The magazine competition that pitted Houdini against the author of 'Sherlock Holmes'

In 1922, Scientific American magazine launched a contest to prove, or disprove, the existence of ghosts and define the limits of Spiritualism. This article details how this competition furthered the growing ideological split between escapologist...

What is 'Spielberg Face'?

Spielberg's career is filled with a consistent technique: zooming in on a significant character's face as they process some essential element of the story. One of the most famous is from "Jaws," when Brody first witnesses the shark.

Horses aren't eaten in the US, though they're delicacies in other places, including Japan and Slovenia.

Among the smallest mass-produced mechanical calculators in history, the Curta was designed by Austrian engineer Curt Herzstark while imprisoned in a Nazi concentration camp during World War II.

A vending machine run with Anthropic's AI went out of business after it was convinced to give away items for free and sell a video game console.

'(Kids) don't remember what you try to teach them. They remember what you are.'

- "Muppets" creator Jim Henson (1936-1990)

Twain claimed to possess 'mental telegraphy'

In an 1891 essay, the writer claimed to possess psychic powers. It’s something that seemingly supported by his mother and his own death: Twain predicted he would die the day after Halley’s Comet returned in 1910, which did indeed happen.

One of Einstein's papers challenged quantum theory but helped confirm entanglement

In 1935, Einstein suggested that quantum mechanics was incomplete due to its strange implications about entangled particles. Their challenge led to decades of experiments that eventually proved distant particles could affect each other instantly.

Button boards may be the next step in human-canine communication

In a viral trend, dogs have been recorded using button boards to seemingly "talk" with humans. Researchers are divided on whether this means dogs have learned language or are engaging in sophisticated behavioral conditioning.

Get the inside story of the duck hunt that birthed the Federal Reserve

Pseudo-duck hunters, private train cars in Hoboken, and a thrilling work week over Thanksgiving 1910—all and more are featured in the wild story of how a group of fed-up bankers and lawmakers tried to create an enduring central bank for the US. Records of the meeting managed to remain hidden for decades.

The true power of being a medieval fool

The stereotypical image of a court jester – their jagged, jingling tunics, donkey-eared hoods, and exaggerated expressions – belies their influence and power in medieval European courts. Jesters mocked their masters and communities through performances that could include witty ripostes, musical instruments, dance, juggling, and more. This gallery offers commentary on the fool’s role and power during the Middle Ages.

The complicated economics of horse racing

The Triple Crown commands big ratings (and enormous amounts of money in betting) but the sport as a whole is in a precarious position, thanks to limited tracks and an overreliance on subsidies. This special from Freakonomics unpacks what all that means for the future of the sport.