PHOTOS: The hidden beauty of sand

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. <span class=meta>(Photo/</span>
January 22, 2014 1:16:13 PM PST