Between 1830 and 1850, the U.S. government forced the Cherokee, the Choctaw, and other tribes off their ancestral lands with deadly force in what's become known as the Trail of Tears.

Fred Rogers, known as Mister Rogers, originally planned to become a Presbyterian minister. But he realized his true calling was teaching children how to love each other — and themselves.

Pablo Escobar was vicious, but Don Berna was strategic and calculating — maybe that's why he survived and Escobar didn't.

After the war ended, Klaus Barbie pretended to be a hobo until he was picked up by the CIA to spy in Bolivia and fight against communism.

John Watt's steam engine not only streamlined travel and manufacturing, but was also an impetus for the Industrial Revolution.

For three days in 1934 that Hitler called the "Night of the Long Knives," the chancellor ordered the execution of some 400 Nazis whom he feared threatened his power.

A 2008 study led by the Smithsonian Institute found that likely all the 13 life-size quartz crystal skulls are likely fakes.

The case of Dr. Sam Sheppard was so controversial from the outset that the federal court later ruled his initial trial a "mockery of justice."

Historians disagree on how cruel Shaka truly was as a ruler, but his military prowess was indisputable.

Conjoined twins occur in just one out of every 200,000 live births.

Ueli Steck may have been Earth's best mountaineer, but one tragically bold attempt on Mount Everest brought his impressive life to an end.