image: A male dik-dik antelope closely follows the female as she searches for food in her territory, guarding her against other males. This image relates to a paper that appeared in the Aug. 2, 2013, issue of Science, published by AAAS. The paper, by D. Lukas and T.H. Clutton-Brock at University of Cambridge in Cambridge, UK, was titled, "The Evolution of Social Monogamy in Mammals." view more
Credit: [Image courtesy of Peter Brotherton]