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Lonely

Friday October 6, 2006

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Bacteria can sense their population density by communicating with extra cellular signal molecules. However, each bacterium decides by itself if the population is dense enough to do things that they will not do if they "feel" lonely. Therefore at intermediate density, some of them (the green cells) "think" it not dense enough while some of them "think" in the opposite way.

--LiveScience Staff

Credit: Yufang Wang, Princeton University 2006 Art of Science Competition

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