If you thought the Salem witch trials were bad, wait until you learn about what went down in Spain.

In the 1990s, hundreds of families in rural England reported that "phantom" social workers had abducted their children. As it turns out, the truth is worse than the urban legend.

Discover how "Lobster Boy" Grady Stiles got his "claws" and how he eventually began using them to commit murder.

The thrilling tale of perhaps the most daring undercover feat in the history of journalism by a woman named Nellie Bly.

Because doctors once totally misunderstood these lethal diseases, they used to treat them in some truly horrifying ways.

No, so-called "patient zero" Gaetan Dugas didn't introduce HIV/AIDS to the United States.

They changed the course of history forever, and yet we hardly know their names.

Donald Trump catches a lot of flack for his stance on immigration and race — as it happens, he's borrowing a lot from early 20th century academics.

Meet Marcel Petiot, the French doctor who promised Jews safe passage from Nazis, only to rob and murder them.

The end of civilization as we know it might not start with a bang — but rather a sneeze.

See why the mysterious murder of Mary Pinchot Meyer, JFK's bombshell, CIA-affiliated mistress have fascinated sleuths for decades.