Found curator Janna Dotschkal shares some of her favorite images on the National Geographic Proof blog.Photographs by Frank Hege, NASA, Hans Hildenbrand and James P. Blair, National Geographic Creative

Found curator Janna Dotschkal shares some of her favorite images on the National Geographic Proof blog.Photographs by Frank Hege, NASA, Hans Hildenbrand and James P. Blair, National Geographic Creative

Two balls dropped from the tower in Pisa replay Galileo’s experiment, November 1974.Photograph by Luis Marden, National Geographic

Two balls dropped from the tower in Pisa replay Galileo’s experiment, November 1974.Photograph by Luis Marden, National Geographic

Thunderstorms cause whips of lightning over the plains in New Mexico, November 1989.Photograph by Bruce Dale, National Geographic

Thunderstorms cause whips of lightning over the plains in New Mexico, November 1989.Photograph by Bruce Dale, National Geographic

Women harvest wheat with sickles then bind it by hand in a field in 1956.Photograph by Franc and Jean Shore, National Geographic

Women harvest wheat with sickles then bind it by hand in a field in 1956.Photograph by Franc and Jean Shore, National Geographic

Neon signs blur the night scene as marines walk on the street in San Diego, California, July 1969.Photograph by James L. Amos, National Geographic

Neon signs blur the night scene as marines walk on the street in San Diego, California, July 1969.Photograph by James L. Amos, National Geographic

Botafogo Bay and Rio de Janeiro at night, September 1920.Photograph by Carlos Bippus, National Geographic

Botafogo Bay and Rio de Janeiro at night, September 1920.Photograph by Carlos Bippus, National Geographic

A piece of wood shot from a cannon shows the damage done by tornadoes. Lubbock, Texas, June 1987.Photograph by Chris Johns, National Geographic

A piece of wood shot from a cannon shows the damage done by tornadoes. Lubbock, Texas, June 1987.
Photograph by Chris Johns, National Geographic

Osterskar Island, Finland.Photograph by Thomas J. Abercrombie, National Geographic

Osterskar Island, Finland.Photograph by Thomas J. Abercrombie, National Geographic

Aerial of the Great Salt Lake in Utah.Photograph by Paul Zahl, National Geographic

Aerial of the Great Salt Lake in Utah.Photograph by Paul Zahl, National Geographic

A tiny model farm built for lightning research and power line tests, June 1950.Photograph by Westinghouse Electric Corp.

A tiny model farm built for lightning research and power line tests, June 1950.Photograph by Westinghouse Electric Corp.

A little boy is dwarfed by a supersized cabbage in Matanuska Valley, Alaska, July 1959.Photograph by Thomas J. Abercrombie, National Geographic

A little boy is dwarfed by a supersized cabbage in Matanuska Valley, Alaska, July 1959.
Photograph by Thomas J. Abercrombie, National Geographic

Residents of La Boca in Buenos Aires, Argentina, like to paint their houses with vivid colors, November 1967.Photograph by Winfield Parks, National Geographic

Residents of La Boca in Buenos Aires, Argentina, like to paint their houses with vivid colors, November 1967.Photograph by Winfield Parks, National Geographic

Hikers stand near the top of a natural rock bridge on Mt. Rainier, Washington, May 1963.Photograph by Barry Bishop, National Geographic

Hikers stand near the top of a natural rock bridge on Mt. Rainier, Washington, May 1963.
Photograph by Barry Bishop, National Geographic

Astronaut Neil Armstrong floats in his space suit in a pool of water in 1967.Photograph by NASA

Astronaut Neil Armstrong floats in his space suit in a pool of water in 1967.Photograph by NASA

A view of volcanic sputtering on Stromboli Island in Italy, December 1982.Photograph by Jonathan Blair, National Geographic

A view of volcanic sputtering on Stromboli Island in Italy, December 1982.Photograph by Jonathan Blair, National Geographic