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Cloudy, With a Chance of Microbes (2 of 2)

Caption: Pseudomonas syringae cells trapped within an ice crystal lattice that was formed in the laboratory from a diluted culture. The ice-nucleating protein of P. syringae appears to result in cells ending up inside the crystal rather than being excluded during freezing, the way other impurities are. This image relates to an article that appeared in the Feb. 29, 2008, issue of the journal Science, published by AAAS. The study, by Dr. Brent Christner and colleagues at Louisiana State University in Baton Rouge, La., was titled "Ubiquity of Biological Ice Nucleators in Snowfall."

Credit: Image courtesy of Shawn Doyle and Brent Christner, Louisiana State University

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