Black & white

A photograph by <n>Lida Chaulet</n> from the 2010 <n>World in Focus Photo Contest</n>.

<n>Vallpojken</n>. Photo by <n>Turker Alagozyaylasi</n>.

A photograph by <n>Phil Penman</n> taken in Atlantic City, New Jersey.

<n>Aspens, Northern New Mexico</n>, a 1958 photograph by <n>Ansel Adams</n>.

<n>Marilyn Monroe</n> in a dress by <n>William Travilla</n> for <n>The Seven Year Itch</n>, photographed by <n>Sam Shaw</n> in 1954.

The <n>Russian Church of St. Nicholas</n> in Sofia, Bulgaria.

An <n>Emilio Pucci</n> bikini by the <n>"Bikini Girls" mosaic</n>, Sicily, 1956. Photo by <n>Elsa Haertter</n>.

A fleet of <n>Marshall Field's</n> delivery wagons in Chicago, 1897.

Photograph <n>Maroon Bells, near Aspen, Colorado</n> (1951) by <n>Ansel Adams</n>.

<n>Skywalker</n>, a photograph taken in New York City, c. 1950.

<n>Robert Doisneau</n>'s photograph "<n>Meeting around a baguette</n>," Paris, 1950.

A 1989 photograph of the racehorse <n>Secretariat</n> by <n>Henry Horenstein</n>.

Giraffe and dog portrait by <n>Mustafa Bayram</n>.

<n>Sand Dunes, Oceano, California</n>, c. 1950. Photograph by <n>Ansel Adams</n>.

Photo by <n>Kees Scherer</n> taken in Amsterdam, 1955.

The 1980 eruption of <n>Mount St. Helens</n>, cover of <n>In the Path of Destruction</n>. Photo by <n>Corbis</n>.

Children view <n>Edgar Degas</n>'s <n>Little Dancer of Fourteen Years</n> at the <n>Norton Simon Museum</n>. Photo by <n>Tom Killy</n>, 1988.

A 1964 photo of <n>Jim Buck</n>, New York City's first professional dog walker, from <n>The New York Times</n>.

A black and white photograph by <n>Kam</n>.

Self-portrait by photographer <n>Marcelo Galiaço</n>.

11-year-old <n>Ciro Ortiz</n> offers emotional advice to New Yorkers. Photo by <n>Adam Homem</n>.

A still from <n>Jean-Pierre Melville</n>'s 1967 film <n>Le Samouraï</n>, starring <n>Alain Delon</n>.