1 of 8: Sand hardly seems like the stuff of dazzling natural beauty - until you see it through Dr. Gary Greenberg's eyes. The images in his series "Sand Grains" are captured through a high-powered, unique light microscope, which transforms ordinary grains into works of art. Greenberg began his career as a photographer and filmmaker; he also earned a PH.D in biomedical research and went on to invent high-definition, three dimensional light microscopes. (Photo/www.sandgrains.com)

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