Gary Heidnik didn't just kidnap, torture, and murder women in the basement of his house of horrors in Philadelphia — he got one of his victims to help.

See rare images of the Indigenous Inuit people who thrived in the Arctic regions of Canada, Alaska, and Greenland before they were forcibly relocated and their culture was all but erased.

The Soviet-Afghan War sparked the collapse of the Soviet Union, the rise of The Taliban and Al Qaeda, and a new era of war and terror.

For 40 years, the U.S. government doctors behind the Tuskegee experiment tricked African-American men with syphilis into thinking they were getting free treatment — but gave them no treatment at all.

The Yakuza aren't just the "Japanese Mafia." They're something entirely different — an organization tied to 400 years of Japanese history.

Richard Wershe Jr., popularly known as "White Boy Rick," was 14-years-old when the FBI enlisted him as an informant.

Mythical animals are more than just make-believe. They are a glimpse into how our ancestors once saw the world and of the fears that filled their imaginations when they heard something go bump in the night.

From 1939 to 1945, the scientists behind the Manhattan Project raced to develop the first nuclear weapon. The results would change history.

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

Believed to have been built 11,000 to 12,000 years ago in modern-day Turkey, Gobekli Tepe predated writing, metal tools, and even pottery.

The Zozo has allegedly harassed hundreds via Ouija board. But is this demonic force from the spirit world or from our own minds?