image: This is a close-up of the eye socket and scleral ring of Protoceratops. This image relates to an article that appeared in the April 14, 2011, issue of Science Express, published by AAAS. The study, by Lars Schmitz and Ryosuke Motani at University of California, Davis, was titled, "Nocturnality in Dinosaurs Inferred from Scleral Ring and Orbit Morphology." view more
Credit: Image courtesy of Lars Schmitz