An infamous punishment used to maintain order at sea in the 17th and 18th centuries, keelhauling was when sailors would be dragged under ships as punishment.

Operation Anthropoid, a secret plan to kill Reinhard Heydrich in 1942, was the only successful assassination of a top Nazi officer during World War II.

Literally translating to "rotting cheese," casu marzu is a traditional Sardinian pecorino made with sheep's milk — and filled with live maggots.

Tara Calico disappeared in Belen, New Mexico on September 20, 1988. A year later, two Polaroids of a tied-up woman were discovered in Florida — was it her?

Born in Plympton, Massachusetts in 1760, Deborah Sampson became a hero of the American Revolution after posing as a man to join the Continental Army.

In the late 1970s, serial killer Richard Chase murdered at least six people in Sacramento, California — and drank the blood of his victims.

Known for both her beauty and her personal demons, Edie Sedgwick shot to fame as an actress with Andy Warhol's "Superstars" before dying at 28 in 1971.

When no one in the United States would train her, Bessie Coleman enrolled in a prestigious flight school in France — and became a fearless stunt pilot known across the world.

Joyce Carol Vincent was a 38-year-old woman in London with a family and friends. So why did it take over two years for people to realize she had died?

Wladyslaw Szpilman was a Jewish pianist living in Warsaw, Poland during World War II. He didn't know that his musical abilities would save his own life.

Carlos Hathcock had 93 confirmed kills of enemy personnel during the Vietnam War, but he estimated the actual number to be between 300 and 400.