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The Knickerbocker Theater's roof collapsed under the weight of snowfall, resulting in 98 deaths.

On This Day in History

Nearly 100 Washingtonians Died When a Theater Collapsed in One of the Largest Snowfalls Ever to Hit D.C.

The Knickerbocker Theater disaster, which took place on this day in 1922, killed 98 moviegoers and injured another 133

World leaders gathered in Oswiecim, Poland, to commemorate the 80th anniversary of the liberation of Auschwitz.

Survivors and World Leaders Gather to Commemorate 80th Anniversary of Auschwitz Liberation

The Nazis murdered an estimated 1.1 million people at the death camp in southern Poland before its liberation on January 27, 1945

The golden helmet of Coțofenești at the Drents Museum

Art Thieves Blew Up a Dutch Museum’s Door to Steal an Ancient Golden Helmet From Romania

The blast took place in the middle of the night, allowing the burglars to abscond with four valuable objects connected to Romania’s cultural heritage

Experts determined that the Japanese hand grenade was inactive.

Staffers Find a Japanese Hand Grenade From World War II at a Museum in Kentucky

After police and the nearby bomb squad investigated to the scene, they announced that the weapon was inactive and safe

Soviet soldiers lead liberated prisoners out of Auschwitz in the winter of 1945.

On This Day in History

The Liberation of Auschwitz—Where More Than One Million Jews Were Killed—Took Place on This Day in 1945

The Nazi concentration and extermination camp was the site of the largest mass murder in human history

Broadway posters as seen in the summer or 2011, when Phantom of the Opera was still running, more than two decades after it opened.

On This Day in History

The Longest-Running Show in Broadway History Opened on This Date in 1988. Read Why Its Legacy Is So Controversial

“The Phantom of the Opera” entertained decades of fans—and lives on even after closing

A Black Brant XII rocket was launched from the Andoya Rocket Range in 2010, 30 years after the Norwegian rocket incident.

On This Day in History

When Russian Radar Mistook a Norwegian Scientific Rocket for a U.S. Missile, the World Narrowly Avoided Nuclear War

The Norwegian rocket incident, which took place on this day in 1995, marked the only known activation of a nuclear briefcase in response to a possible attack

The recently discovered statue is missing its arms and head.

Cool Finds

A Man Found a Mysterious Statue in a Trash Bag on the Street. It Turned Out to Be a 2,000-Year-Old Greek Artifact

After discovering the ancient artwork in a suburb of Thessaloniki, Greece, the man surrendered it to the police. Authorities are analyzing the statue and investigating why it was abandoned

Researchers from the the Polytechnic University of Milan are mapping the castle's subterranean structures.

Cool Finds

Secret Passageways Recorded in Leonardo da Vinci’s Sketches Discovered Beneath a Medieval Castle in Milan

Using ground-penetrating radar and laser scanners, researchers identified subterranean structures just a few feet below the ground. The pathways may connect Sforza Castle to a nearby basilica

Sutter's Mill, California, where John Augustus Sutter struck gold, accidentally starting the gold rush.

On This Day in History

The Discovery of Gold on This Date in 1848 at Sutter’s Creek Kicked Off the California Gold Rush and Transformed America

The unquenchable demand for gold spurred a mass migration and fueled the genocide of Native communities

The statue of Athena had been housed in William Weddell's estate in England since the 1700s.

See the Stunning Ancient Roman Statue of Athena That’s Going on View for the First Time in Nearly 260 Years

After spending centuries on a British aristocrat’s estate in North Yorkshire, the marble masterpiece will be unveiled in Chicago’s Wrightwood 659 gallery later this week

Researchers discovered 614 stone plaques and fragments at Vasagård West, an archaeological site on the Danish island of Bornholm.

New Research

Neolithic Farmers May Have Buried These Mysterious Stones to Bring Back the Sun After a Volcanic Eruption

Using ice core samples, researchers linked a natural disaster with a trove of nearly 5,000-year-old artifacts discovered at an archaeological site in Denmark

The gold medal still has its original ribbon and leather case.

This Rare Gold Medal From the 1904 Olympics Sold for More Than $500,000

The artifact, from the first Games held in the United States, reaped the third-highest price ever fetched for an Olympic medal at auction

A group of Englishmen toss Frisbees in 1966.

On This Day in History

An American Toy Company Produced the World’s First Frisbees, Beloved by Humans and Dogs, on This Day in 1957

The flying disc had humble beginnings but has since become an international phenomenon

Hand-drawn illustration of two of the seven sampled molars from Australopithecus

Ape-Like Human Ancestors Were Largely Vegetarian 3.3 Million Years Ago in South Africa, Fossil Teeth Reveal

Scientists suggest meat consumption was pivotal to humans’ development of larger brains, but the transition probably didn’t start with Australopithecus, according to a new study

The helmet was made in the Corinthian style, though historians don't know whether the style actually originated in Corinth.

You Can Buy a 2,500-Year-Old Corinthian Helmet Worn by a Warrior in Ancient Greece

Experts think the well-preserved bronze artifact was made between 500 and 450 B.C.E. It will be sold at auction on January 25

This copy of the Declaration was printed by Robert Luist Fowle of New Hampshire.

This Rare Printing of the Declaration of Independence Could Sell for $4 Million

Made by a printer in New Hampshire, this 1776 broadside edition was created to disseminate America’s founding document to the public

The mosaic depicts Alexander the Great fighting in the Battle of Issus.

New Research

Experts Are Unraveling the Mysteries of This Breathtaking 2,000-Year-Old Mosaic Depicting Alexander the Great in Battle

The ancient artwork was uncovered during excavations at Pompeii in the 19th century. Now, researchers are conducting a long, intensive analysis

The Valencia wrecked in the northern reaches of the area referred to as the “Graveyard of the Pacific,” the stretch of treacherous coastline between Oregon’s Tillamook Bay and Canada’s Vancouver Island.

On This Day in History

More Than 100 Died When the S.S. Valencia Wrecked in the ‘Graveyard of the Pacific’—Learn Why This Stretch of Coastline Has Claimed Thousands of Ships

The ship’s demise on this day in 1906 demonstrated the terrifying dangers of the treacherous waters in the Pacific Northwest

Spanish settlers knocked down all but the foundations of the Temple of the Sun, then built a church atop the Inca walls.

New Research

Researchers Have Found an Inca Tunnel Beneath the Peruvian City of Cusco

The dug-out passages may follow the exact path of the Inca capital’s aboveground roads

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