Two young women stand near a turning aircraft propeller, 1940.Photograph by Luis Marden, National Geographic Creative

Two young women stand near a turning aircraft propeller, 1940.
Photograph by Luis Marden, National Geographic Creative

Two men struggle to free their scooter from a barbed-wire barricade in Saigon, South Vietnam, 1965.Photograph by W. E. Garrett, National Geographic Creative

Two men struggle to free their scooter from a barbed-wire barricade in Saigon, South Vietnam, 1965.Photograph by W. E. Garrett, National Geographic Creative

Visitors of diverse nationalities crowd a casino roulette table in Swaziland, 1969.Photograph by Volkmar K. Wentzel, National Geographic Creative

Visitors of diverse nationalities crowd a casino roulette table in Swaziland, 1969.Photograph by Volkmar K. Wentzel, National Geographic Creative

The first explorers to descend to the deepest part of the ocean were Don Walsh and Jacques Piccard in the bathyscaphe Trieste, January 23, 1960. 52 years later, James Cameron’s DEEPSEA CHALLENGER journeyed to the bottom of the Mariana Trench, nearly 7 miles below sea level.Photograph courtesy U.S Navy

The first explorers to descend to the deepest part of the ocean were Don Walsh and Jacques Piccard in the bathyscaphe Trieste, January 23, 1960. 52 years later, James Cameron’s DEEPSEA CHALLENGER journeyed to the bottom of the Mariana Trench, nearly 7 miles below sea level.
Photograph courtesy U.S Navy

Motorists pass people on a scenic road atop a cliff overlooking a bay near Trieste, Italy, 1956.Photograph by B. Anthony Stewart, National Geographic Creative

Motorists pass people on a scenic road atop a cliff overlooking a bay near Trieste, Italy, 1956.Photograph by B. Anthony Stewart, National Geographic Creative

Portrait of a daughter of Danaus acting in “The Suppliant Maidens” on Mount Parnassus in Greece, December 1930.Photograph by Maynard Owen Williams, National Geographic Creative

Portrait of a daughter of Danaus acting in “The Suppliant Maidens” on Mount Parnassus in Greece, December 1930.Photograph by Maynard Owen Williams, National Geographic Creative

The shadow of an aircraft over the Saudi desert, November 1986.Photograph by Jodi Cobb, National Geographic Creative

The shadow of an aircraft over the Saudi desert, November 1986.Photograph by Jodi Cobb, National Geographic Creative

A Native American sends smoke signals in Montana, June 1909.Photograph by Dr. Joseph K. Dixon, National Geographic Creative

A Native American sends smoke signals in Montana, June 1909.Photograph by Dr. Joseph K. Dixon, National Geographic Creative

A farmer embraces his dog in his stonewalled field on Inishmore Island in Ireland, March 1971.Photograph by Winfield Parks, National Geographic Creative

A farmer embraces his dog in his stonewalled field on Inishmore Island in Ireland, March 1971.Photograph by Winfield Parks, National Geographic Creative

A quiet mosque in Palestine, 1926.Photograph by Jules Gervais Courtellemont, National Geographic Creative

A quiet mosque in Palestine, 1926.Photograph by Jules Gervais Courtellemont, National Geographic Creative

A boy sells lemonade from his front yard stand on Main Street in Aspen, Colorado, 1973.Photograph by Dick Durrance II, National Geographic Creative

A boy sells lemonade from his front yard stand on Main Street in Aspen, Colorado, 1973.Photograph by Dick Durrance II, National Geographic Creative

A kitten aboard a floating Victoria water lily pad in the Philippines, 1935.Photograph by Alfred T. Palmer, National Geographic Creative

A kitten aboard a floating Victoria water lily pad in the Philippines, 1935.Photograph by Alfred T. Palmer, National Geographic Creative

Palm trees and a photographer cast shadows on the ocean’s surface near Tahiti Island, Polynesia, May 1996.Photograph by Jodi Cobb, National Geographic Creative

Palm trees and a photographer cast shadows on the ocean’s surface near Tahiti Island, Polynesia, May 1996.Photograph by Jodi Cobb, National Geographic Creative

Characters in a pageant depict “Britannia” and her colonies and dependencies, 1928.Photograph by Clifton R. Adams, National Geographic Creative

Characters in a pageant depict “Britannia” and her colonies and dependencies, 1928.Photograph by Clifton R. Adams, National Geographic Creative

Women sit in a modern chic boutique in Casablanca, 1971.Photograph by Thomas J. Abercrombie, National Geographic Creative

Women sit in a modern chic boutique in Casablanca, 1971.Photograph by Thomas J. Abercrombie, National Geographic Creative