Mary Cassatt's mural from the 1893 World's Fair mysteriously disappeared

One Mary Cassatt painting features a sly political message

Critics had long been puzzled by the unrealistic flower pinned to the woman's chest in the 1905 painting "Mother and Child." In exploring the painting's history, researcher Nikki Georgopulos discovered that the flower alluded to a women's suffrage badge popular at the time, something Cassatt emphasized in the painting's original title, "Woman With a Sunflower."

Why can't we see Mona Lisa's eyebrows?

The world's most famous painting is missing something. And it took centuries for experts to figure out what. In this episode, August Moon investigates what happened to the Mona Lisa's eyebrows—analyzing infrared scans, tracking 500 years of restoration, and examining a forgotten copy from Leonardo's studio. But he uncovers something bigger: what we lost after the 1911 theft that has nothing to do with the painting leaving the Louvre.

See Salvador Dalí's art at MoMA

The Museum of Modern Art in New York City hosts some of Dalí's most recognizable works, including "The Persistence of Memory," pictured below, and its famous melting clocks. MoMA acquired the painting in 1934, after it became a sensation in 1932.

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

This famous painting was hung upside-down for 77 years

According to a curator at a German museum, an abstract painting by Dutch artist Piet Mondrian has been displayed upside down for seventy-seven years at a number of museums.

The Mona Lisa's celebrity status and repeated restorations have obscured what made the painting so revolutionary for its time

Augusta Savage's masterpiece was destroyed after a limited exhibition

"Life Every Voice and Sing," sometimes called "The Harp," debuted at the 1939 New York World's Fair. Based on the James Weldon Johnson poem (and eventual unofficial Black national anthem) of the same name, the massive, 16-foot-tall sculpture depicted a kneeling Black man holding a bar of music in front of 12 chorus singers. After the fair ended in 1940, Savage was unable to pay to preserve it, so it was destroyed.

The Foolkiller: The mysterious submarine at the bottom of the Chicago River

In November 1915, a submarine was found at the bottom of the Chicago River. It had been there for at least 10 years, was 40 feet long, and contained the remains of a man and his dog. To this day, no one knows who built it.

William Mumler’s spirit photography stunned and bewildered the public

William Mumler’s most famous work is a portrait of Mary Todd Lincoln accompanied by the ghost of her deceased husband, Abraham Lincoln. Other subjects of Mumler's photos claimed that the spirits standing beside them resembled their loved ones. Mumler’s method was never officially proven and continues to mystify viewers.

American modernism highlighted a rapidly changing America

Featuring work from 1915 to 1950, the movement illustrates the country's evolution between World War I and World War II. Artists captured the loss and uncertainty of a post-war, industrialized world.

Dolley Madison rescued George Washington's portrait before the White House burned

As British troops approached in August 1814, first lady Dolley Madison ordered Gilbert Stuart's full-length portrait of George Washington removed from the White House, which remains displayed in the building today. She also secured key state papers and valuables before fleeing.

Explore the collection of vivid frescoes Pompeii left behind

This gallery showcases remarkably preserved frescoes depicting food, daily life, landscapes, and myth. Tools abandoned during the eruption reveal how ancient artists worked, offering insight into Pompeii’s visual culture before Vesuvius buried the city in ash.

The 1902 McMillan Plan reimagined the National Mall as a formal, open civic space

Drafted by the Senate Park Commission, the McMillan Plan called for the removal of railroads, markets, and industrial uses from the Mall; revived key elements of Pierre L'Enfant's original layout; and established the framework for the Mall's long lawns, museum placement, and monumental core.

The unsolved mysteries of Machu Picchu

Who lived there? How did they get all that granite up there? Who were the 100 bodies found buried here, and why did some of them have elongated heads? Explore eight of Machu Picchu’s unanswered questions while scrolling through panoramic, clickable street-view images of the site, in this guide from Google Arts and Culture.

A group claims a man is trapped inside Chicago's 'Cloud Gate'

Although they appear to be performance artists, the group claims they're earnestly protesting the captivity of a man inside the iconic public art piece designed by Anish Kapoor. City officials say there is no man inside the object.

A 94-year-old stumbles upon a photo of herself from 1947 at an airport

Earlier this year, Gwendolyn Bruhn, who worked for Hawaiian Airlines in the 1940s, spotted herself in a photo blown up on an airport wall. Here's her story.

Marina Abramović took 3,500 photos of China while performing ‘The Lovers’

During the 90-day performance that took place on the Great Wall of China, Abramović lived in isolation, nearly fell into an abyss, and wrote poetry—among other transformative experiences.

The history of the Women's World Cup

The tournament began in 1991 with the US team winning. Since then, it's gradually become an international phenomenon. This resource from the National Women's History Museum traces how it evolved.

The World Cup trophy was stolen in 1966—and eventually found by a dog

While on display at the Methodist Central Hall in Westminster, England, the Jules Rimet Trophy was stolen while a church service was being held in another room. It was eventually sniffed out a week later by Pickles, a black-and-white collie.

The history of the world map

What did people used to think the world looked like? From the beginning of human history to right before the age of exploration, learn how the world maps were created.

The fictional children who ran away to live in the Met

E.L. Konigsburg’s classic children’s book 'From the Mixed-Up Files of Mrs. Basil E. Frankweiler' tells the story of two siblings who run away from home to live in the Metropolitan Museum of Art. In the process, they stumble across a historical art mystery and befriend the eccentric Mrs. Frankweiler, who might hold the key. Read about how the book came to be and the impact it had on generations of young readers.

Taliesin offered Frank Lloyd Wright an oasis away from gossip and scrutiny

After a public affair that damaged his reputation, Frank Lloyd Wright built a hideaway for himself and his mistress. This grand Wisconsin structure is now a National Historic Landmark after experiencing two major fires, each followed by major renovations.

An in-depth account of the image of 'The Falling Man' whose final seconds capture the visceral horrors of 9/11

Do you remember the photograph above? In the US, people have taken pains to banish it from the record of Sept. 11, 2001. Here's a detailed account of the story behind it, the search for the man pictured in it, and its impact on those who lived through the tragic day.

How Lucia Moholy's photography captured the Bauhaus aesthetic

The photographer was one of the few affiliated with the school who photographed its locations, documenting the modern style long after the Nazis had driven its artists from Germany. This podcast episode explores why she went uncredited for so many years.

The Sears Tower was the world’s tallest building for about 25 years

Originally constructed in 1970, the Sears Tower in Chicago was later renamed the Willis Tower shortly after Sears headquarters moved out of the building.

An archive of the art of the Sanborn fire insurance maps

For a century, US insurance companies used Sanborn Fire Maps to decide the premiums customers would pay for fire insurance. These maps were designed to show the building materials used in each structure in 12,000 communities across 300,000 maps. While they have become obsolete, these maps are still useful for historians and urban designers, and anyone interested in lovely, original typography. Dive into the most artful Sanborn Fire Maps with this passion project collection.

Meet the Marree Man, one of the world's largest works of art

In the summer of 1998, a pilot flying over the Australian outback discovered a geoglyph 1.7 miles long featuring an aboriginal man hunting. The massive work of art is one of the world's largest.

Dorothy's famous entrance into Oz in 'The Wizard of Oz' relied on analog tricks, including a body double and sepia-toned paint, as much as it did on technology

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

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

One of the most famous portraits ever taken is 'Afghan Girl' (1984) by Steve McCurry, yet the subject Sharbat Gula went much of her life without being identified or benefitting from the image's success.

'Grand Canyon of the Yellowstone,' a work by American painter Thomas Moran, inspired Congress to establish Yellowstone National Park.

American dance legend Martha Graham, sometimes called 'the Picasso of dance,' refused to perform at the 1936 Olympics in Berlin and conceived the piece 'Chronicle' in response to the experience.

In 1945, Surrealist artist Salvador Dalí and legendary animator Walt Disney began collaborating on a short film that was not completed until 2003, years after both men had died.

The identity of the Tank Man in the iconic photo from the 1989 Tiananmen Square protests remains unknown and was possibly killed.

Legendary architect Frank Lloyd Wright designed the SC Johnson headquarters in Wisconsin, aiming to make a cathedral-like workplace

Mid-century modern graphic designers, known for their bright colors and bold lines in advertising, also found success with children's books.

See 33 images that became central to huge scandals, including a young Charles and Camilla, Michael Jackson's baby on a hotel balcony, and Hugh Grant's mugshot.

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

See a 3D reconstruction of Tenochtitlan, the Aztec capital that was home to an estimated population of 200,000 to 400,000.

The US first hosted the World Cup in 1994, a tournament that lives in soccer infamy for its poor planning and the murder of Colombian player Andres Escobar, who'd accidentally scored on his own net.

In 2009, the nation was gripped by the story of a missing young boy who was believed to be floating over Colorado in a homemade balloon, until it was revealed that he was at home the whole time.

After NASA's Voyager 1 captured Earth as a single pixel as it left the solar system in 1990, astronomer Carl Sagan used the image to reflect on humanity's fragility and the responsibility to protect 'the only world we've ever known.'

See the 25 of the best photos of auroras from around the world.

Against his wishes, Albert Einstein's brain was removed before his cremation, and the pathologist responsible stored it for decades in mason jars within a beer cooler.

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.

Explore an interactive map built from more than 100,000 survey responses on where people find joy in their lives

In 2019, a laptop loaded with six of the worst malware in history and described as 'an exhibit of historical weaponry' sold for $1.3M.

The hormonal disorder PCOS was renamed PMOS in 2026, a move designed to improve care and research by shifting the focus to the hormonal causes of this condition that affects 1 in 8 women.

The most expensive ad of all time was for Chanel No. 5 perfume and cost roughly $33M to produce in 2004—about $57M in today's dollars.