Perhaps the Union's most important spy, Elizabeth Van Lew freed prisoners and passed along crucial information gathered at the Confederate capital of Richmond.

Rumors of Sally Hemings and Thomas Jefferson's relationship spread even while they were alive — and DNA testing in 1998 suggested that Jefferson was indeed the father of Hemings' four children who survived into adulthood.

Born with "a good-sized mustache" that quickly turned into a full beard, Annie Jones was put on display in sideshows by her parents before she could even walk.

Harry Alonzo Longabaugh, better known as the Sundance Kid, was a notorious outlaw who robbed banks and trains across the American frontier before fleeing to South America in 1901.

James Dean's brief time in the spotlight came to an abrupt end when he died in a tragic car accident on September 30, 1955 — and the details of his death remain both perplexing and disturbing to this day.

In September 1982, 12-year-old Johnny Gosch disappeared while delivering newspapers in West Des Moines. Fifteen years later, his mother claims he visited her one night and told her he was the victim of a pedophile ring.

The fortress was specially constructed on a foggy mountainside to keep Escobar's enemies out — and not the cocaine kingpin in.

As a Japanese prison camp guard during World War II, Mutsuhiro Watanabe was notorious for his cruelty toward POWs, including former U.S. Olympian Louis Zamperini.

Saddam Hussein and Sajida Talfah were together for 43 years following their arranged marriage, but she has maintained a low profile since the U.S. invasion of Iraq in 2003.

From Kenny the tiger to Otto the kitten, you've probably seen content about animals with Down syndrome. But what's the truth about their conditions?

Abigail Folger was stabbed 28 times by Manson Family members Patricia Krenwinkel and Tex Watson as Charles Manson's followers killed everyone inside the Los Angeles home of actress Sharon Tate in August 1969.

The Nazis may have killed 14-year-old Czeslawa Kwoka at Auschwitz, but her powerful portrait taken at Auschwitz lives on today.