Starting in October 1977, Hillside Stranglers Kenneth Bianchi and Angelo Buono murdered 10 women and dumped their bodies in the hills surrounding Los Angeles.

On August 14, 1980, Playmate of the Year and budding actress Dorothy Stratten was gunned down by her estranged husband. She was just 20 years old.

These tragic photos and stories capture the horrors of the Nanking Massacre — a.k.a. the Rape of Nanking — committed by Japanese soldiers against Chinese civilians.

From 1961 to 1971, the U.S. used the herbicide and defoliant Agent Orange in Vietnam, leaving behind millions of victims with deadly diseases and birth defects.

Built between 9500 and 8000 BCE in present-day Turkey, Göbekli Tepe is a Neolithic place of worship that predates Stonehenge by over 6,000 years.

An 18th-century French showman, Tarrare could eat enough to feed 15 people and swallow cats whole — but his stomach was never satisfied.

On a busy Saigon street in June 1963, Buddhist monk Thích Quảng Đức lit himself on fire and set off a chain of events that led to America's involvement in the Vietnam War.

Despite his mythic handicap, Ivar the Boneless was the most fearsome Viking of his time and conquered England with his heathen army.

Known informally as the Japanese mafia, the Yakuza are a 400-year-old criminal syndicate that carries out everything from human trafficking to real estate sales.

Reinhard Heydrich had many nicknames: "the Blond Beast," "the Hangman," and "the Butcher of Prague" — but none of them quite captured just how ruthless he was.