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Colorful Cells

Brain cells of a laboratory mouse are shown glowing with multicolor fluorescent proteins at Harvard University in Cambridge, Mass., in an image released Wednesday, Oct. 8, 2008. The Nobel prize in chemistry was awarded Wednesday to two Americans and a U.S.-based Japanese scientist for research on a glowing jellyfish protein that revolutionized the ability to study disease and normal development in living organisms.

(Photo: AP Photo/Harvard University)