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It took months of stakeouts, surveillance, and eggshell forensics.

The "mystery tug boat" was a U.S. Navy ship that had disappeared without a trace in 1921.

A gargantuan crystal kingdom is hidden beneath the surface of Chihuahua, Mexico.

According to experts, it's unlike any word, in any language.

In the 1890s, a group of disaffected Australians tried to create a South American utopia.

The disappearance of a favorite condiment brand is rocking the island to its core.

Earth’s only natural satellite was once a much hotter place.

No direct evidence has been found to prove the disease exists.

The vegetarian animals regularly massacre squirrels, which they may see as rivals.

Nearly 200 expeditions in 35 states and 25 countries. Join us!

If you've ever wondered what noise these adorable, slow motion creatures make, this is the video for you.

Facial grooming may have peaked in the era of Social Darwinism.

There is a scientific explanation for this.

Want a storm named after you? Well, it's complicated.

The word first appeared in print in the Boston Morning Post to make fun of a rival paper.

Marm Mandelbaum, the Queen of Fences, turned street rats into professional criminals.

At least, it looks an awful lot like a lake.

How one photographer rephotographed the sites from an 1871 expedition.