Tasked with treating victims of the Black Death, plague doctors wore all-leather suits and beak-like masks to avoid catching the fatal disease.

Bobby Fischer became the World Chess Champion after defeating Soviet Boris Spassky in 1972 — then he descended into madness.

Pablo Escobar's cousin and right-hand man, Gustavo Gaviria wielded untold power behind the scenes while helping to run the Medellín Cartel, until he was killed by Colombian police in 1990.

On a pig farm in La Porte, Indiana, Belle Gunness killed two of her husbands, a handful of single men, and several of her own children before mysteriously disappearing in 1908.

In the early 1980s, Griselda "La Madrina" Blanco was one of the most feared drug lords of the Miami underworld.

The full story of how James Bulger killers Robert Thompson and Jon Venables led their two-year-old victim past dozens of witnesses on a grim path to his chilling death.

Before Ringo Starr, the Beatles toured with drummer Pete Best, but differences led to his ousting just before the band reached worldwide success.

On December 16, 1985, John Gotti oversaw the assassination of Gambino family boss Paul Castellano outside Sparks Steak House in Manhattan — a hit that would change the Mafia forever.

Since being discovered in 1926, the Nazca Lines have inspired countless theories about their origin. Are they extraterrestrial, a message from ancient civilizations, or something more sinister?

A gentleman gunslinger who could quote Shakespeare, Johnny Ringo was a mythic gunslinger who died a mysterious death befitting his legend.

Between 1830 and 1850, the U.S. government forced the Cherokee, the Choctaw, and other tribes off their ancestral lands with deadly force in what's become known as the Trail of Tears.