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Mollusc shell, light micrograph
Light micrograph (fluorescence microscopy) of a micromollusc. Micromolluscs are shelled mollusk which is extremely small even as adults. Many are only about 2 to 3 mm and a few have shells whichare as small as one millimetre. The photograph was captured using ultraviolet light. Microalgae and cyanobacteria that grow on the surface of the shell are autofluorescing in red and orange under the ultraviolet light. Magnification: x70 when printed at 10 centimetres wide at its longest edge., by HAKAN KVARNSTROM / SCIENCE PHOTO LIBRARY
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