After 30 years of solemnly pledging "never again," the world stood by and watched in horror as another genocide unfolded — this time in Cambodia under Pol Pot.

Was Jesus white, Black, or another race entirely? Go inside the complicated history of what color Jesus of Nazareth may have been.

King Aethelred II of England was crowned when he was just 10 years old, and his reign was marked by a series of blunders so bad that he was usurped by the King of Denmark in 1013.

From his exploits during the Lincoln County War to his death at the hands of Pat Garrett, Billy the Kid's tale of Old West bloodshed is the stuff of legend.

Created with psychology and science in mind, the Stanford Prison Experiment turned regular people into monsters.

Identity politics can lead to some truly violent outcomes. Case in point: the Aryan Brotherhood.

While the men wore lead aprons to protect themselves from the radiation, the women were given nothing. The Radium Girls were even told to lick their brushes to get a fine point for detail work.

Dr. Josef Mengele's medical facility at Auschwitz was perhaps the most horrifying place the Holocaust produced. Who was this man behind it all and what made him the notorious "Angel of Death"?

It's a persistent rumor, and one that has some basis in historical fact: was Abraham Lincoln gay?

In 1932, Australia went to war against an enemy like none it had ever faced before: the emu.

"Rosie the Riveter" is regarded as a feminist icon today, but the image on which it was based had nothing to do with feminism.