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Fluorescent-stained Spirochaeta americana. The red spiral-shaped figures are dead cells; green ones are living.

Fri, 03/12/2010 - 19:19 — Shapiro, Leo
Fluorescent-stained Spirochaeta americana. The red spiral-shaped figures are dead cells; green ones are living.
Photographer: Richard B. Hoover, Elena Pikuta and Asim Bej, NASA/NSSTC Univ. of Alabama at Huntsville and Univ. of Alabama at Birmingham