A spy device developed during the Cold War has evolved into ubiquity, used for everything from tracking cow medications to locating nuclear materials.

After boarding a plane to visit her estranged husband in 1986, Marcela Basteri disappeared. Her whereabouts are still a mystery.

As one of Mexico’s biggest pop stars, Juan Gabriel’s talent and rags-to-riches story were legendary. But despite his fame, he was able to keep an astonishing number of secrets — ones that resulted in speculation over his life and death, and a fight over his vast estate.

To this day, no one knows what made Berenger Saunier so incredibly wealthy. Some believe he uncovered ancient treasure from the Knights Templar. Others claim he held secrets about Jesus Christ.

Every year, thousands of people flock to a tiny French village to solve an ancient mystery.

Is the threat posed by global warming as imminent as it seems? Is it possible that corporations are manipulating data (and exploiting our fears) to make an extra buck? And how likely is it that humans aren’t to blame after all?

Over the last century, the fossil fuel industry has exploded. Carbon emissions are at an all time high. Wildfires and hurricanes are on the rise.

The world looked on in shock when an assassin shot Pope John Paul II in May 1981.

In 1917, three children in Fatima, Portugal received a series of prophetic messages that were kept secret for decades — first at the behest of the heavenly message-giver, and then by the Vatican itself.

Over the centuries, a stash of secret documents kept by priests ballooned into millions of documents.

Today, Vatican City is known as an elegant seat of divine power and prestige. But the centuries-long history of the Vatican is marked by bloodshed, corruption, and secerts.

When it comes to government surveillance, most people likely have little to hide. But did a partnership with Silicon Valley unlock unprecedented levels of personal data?

In the aftermath of 9/11, the government-approved PRISM surveillance program was meant to help keep America safe from terrorist attacks.

During the Cold War, many believed the Soviet’s greatest weapon was fear.

Meteor crashes with no remains, metallic objects over small villages, and jellyfish creatures hovering above city centers...

CIA agent Kermit Roosevelt led a covert operation to overthrow Iran's Prime Minister in 1953.

After Iran nationalized its oil fields, a seminal coup erupted in 1953.

New Coke was one of the biggest commercial flops in American history, and a massive success for Coca-Cola.

In 1886, an Atlanta-area pharmacist created an American institution: Coca-Cola. Seven years later, their rival, Pepsi, debuted.

19th century author Mary Shelley is known for penning the classic horror novel, Frankenstein. But many contest her authorship.

J.D. Salinger’s The Catcher in the Rye has been held as a seminal book of required reading in America.

On April 3rd, 1996, the weather in Croatia wasn't great — but it wasn't bad enough to explain why experienced Air Force pilots crashed into a mountain.

In 1996, during a trade mission to Croatia, U.S. Secretary of Commerce Ron Brown and 34 other passengers died in a plane crash — one that seemed too bizarre to chalk up to an accident.

Many experts believe the world will run out of oil in the next 30 years, and some people think the looming scarcity inspired unconscionable acts — like the Iraq War in 2003.

In 1859, a prospector invented modern drilling technology and kicked off an oil rush in the United States.