So exactly when did we humans learn that no two snowflakes are alike? Wilson A. Bentley is the man generally credited with figuring it out. By adapting a microscope to a bellows camera, he became in 1885 the first person to photograph a single snow crystal. He went on to photograph some 5,000 snowflakes over more than 40 years and never found a perfect match between them. Ironically, Wilson Bentley died of pneumonia after walking home through a blizzard in 1931.