"Henri Cartier-Bresson: The Modern Century" at the Museum of Modern Art in New York is the first major U.S. retrospective in more than 30 years of one of photography's most original and influential masters.

When it comes to photography, a Wilson Bentley image can be described much like his favorite subject, the snowflake: Each is one of a kind. After all, the Vermont farmer was the first to ever photograph one.