The shortest war in history asserted the dominance of a colonial power over a subjugated land.

Prohibition-era gangster George "Machine Gun" Kelly pulled off one of American history's most infamous crimes and thought he got away with it. Then his victim got revenge.

Sombra Negra call their brand of justice a “social cleansing.”

William Walker believed in Manifest Destiny and that America needed to set its sights on Central America.

Udham Singh witnessed a massacre and spent the rest of his life dreaming of getting his revenge.

If Zeno's paradoxes seem confusing, you're not alone.

The Kailasa Temple was carved over dozens of years, under several rulers, out of a single piece of stone.

When Col. Henry Ludington needed someone to rouse his militiamen before the British arrived, he called upon his 16-year-old daughter, Sybil Ludington.

Though in many ways Hollywood has whitewashed the Wild West, some of the first settlers were freed slaves who traveled west and became the black cowboys of the American frontier.

If not for the indomitable Queen Olympias, Alexander the Great may never have conquered half the world during his historic reign.

From torture to witches to dismemberment, "Cat got your tongue" has origins more sinister than you ever imagined.

How a few largely forgotten men may have saved the world.