image: Gypsy moth caterpillars in the last stages of infection dying on an oak tree. This image relates to an article that appeared in the Sept. 9, 2011, issue of Science, published by AAAS. The study, by Dr. K. Hoover of the Pennsylvania State University in University Park, Pa., and colleagues was titled, "A Gene for an Extended Phenotype." view more
Credit: Image courtesy of Michael Grove