image: A crayfish entering a light arm. This image relates to a paper that appeared in the 13 June, 2014, issue of Science, published by AAAS. The paper, by P. Fossat at the Université de Bordeaux in Bordeaux, France, and colleagues was titled, "Anxiety-like behavior in crayfish is controlled by serotonin." view more
Credit: [Image courtesy of Jean-Paul Delbecque]