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That's what Dr. Gary Greenberg found when he first turned his microscope on beach sand. Gemlike minerals, colorful coral fragments, and delicate microscopic shells revealed that sand comprises much more than little brown rocks.  Author and photographer Dr. Gary Greenberg is a visual artist who creatively combines art with science.  He has a Ph.D. from University College London and holds 17 patents for high-definition 3-D light microscopes.  Book available at Amazon.

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