Image: Eureka Prize: Didymosphaenia geminata

Eureka Prize: Didymosphaenia geminata

For promotion of New Scientist Eureka Prize for Science Photography only.

Bearing the unfortunate name of "Rock Snot" in New Zealand, this beautiful diatom often overgrows in streams. It then ruins the habitat for fish and has an unpleasant consequence on recreational activities. The individual diatoms have been mounted by hand on to a slide; the exqusiite colours have been introduced in the microscope by the technique of differential interference contrast.

Ron Oldfield
© Ron Oldfield

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