Beatlemania was a fan frenzy that followed the Beatles as they toured across the globe. Some believed it was a mental illness — and these photos make it easy to see why.

These powerful historical photos reveal the how and the why behind the fall of the Soviet Union like never before.

Life for many African Americans changed very little during the Reconstruction era, despite the 13th Amendment. From "Black Codes" to sharecropping, the struggle for equality continued.

Hatred starts at home.

These photos reveal what life was like inside fascist Italy in the blood-soaked years both before and during World War II.

In the 1980s, the AIDS epidemic reached a fever pitch, but these photographs helped change the way the world saw the disease.

These one-of-a-kind early 20th-century photos depict the Crow tribe as their way of life was on the verge of changing forever.

Rarely seen images that reveal the human side of this historic mission.

When the first Americans settled into Alaska, the land and the natives who lived in it went through some profound changes.

The mods and the rockers of the 1960s tore the beaches of England apart. It was war: leather-clad rockers against the stylish mods.

In less than a minute, the eruption of Mount Pelee wiped out the whole city of St. Pierre. Only three people made it out alive.