Purchased by a wealthy Scottish widow in 1864, the family-owned island of Niihau is committed to preserving its natural and cultural history — perhaps at a dangerous cost.

Kray twins Ronnie and Reggie ran the streets of London's East End in the swinging 1960s — and they made crime and decadence look good.

Barry Seal smuggled cocaine for Pablo Escobar and the Medellín cartel for years — and then he became an informant for the DEA to help bring them down.

Adolf Hitler claimed that British war hero Henry Tandey nearly killed him during World War I, then changed his mind at the last moment. But did Hitler make this story up?

Though Sebastián Marroquín grew up as Pablo Escobar's son Juan Pablo Escobar, he later moved to Argentina and distanced himself from his infamous father.

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

On New Year's Eve in 1812, Theodosia Burr Alston boarded a ship bound for New York to reunite with her father after the death of her child. She never made it.

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

Measuring up to 13 feet long and weighing at least 1,200 pounds, the shortfin mako shark is a formidable predator in oceans all over the world.

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.