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These microscopic roundworms, called Caenorhabditis elegans, lack eyes and the opsin proteins used by visual systems to detect colors. However, researchers found that the worms can still sense the color of light in a way that enables them to avoid pigmented toxins made by bacteria. This image was captured using a stereo microscope.
H. Robert Horvitz and Dipon Ghosh, Massachusetts Institute of Technology.
Eugene L. Q. Lee, Massachusetts Institute of Technology.
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