00832cam a2200217 4500 503753998 TxAuBib 20080605120000.0 070821s2008||||||||||||||||||||||||eng|u 9780760331989 0760331987 TxAuBib Greenberg, Gary, 1944- A grain of sand : nature's secret wonder / text and photography by Gary Greenberg. St. Paul, MN : Voyageur Press, 2008. 112 p. : col. ill. A signature written in sand -- Erasing the line between science and art -- The nature of sand -- Colors in sand -- Shapes of sand grains -- Patterns in grains of sand. 20080605. Microphotography. Sand.