image: Drs. Florent Rivals and Gina Semprebon review their data on fossil horse molars related to changing horse diets over time. This image relates to an article that appeared in the March 4, 2011, issue of Science, published by AAAS. The study, by Dr. Matthew Mihlbachler, at the New York College of Osteopathic Medicine in Old Westbury, N.Y., and the American Museum of Natural History in New York, N.Y., and colleagues was titled, "Dietary Change and Evolution of Horses in North America." view more
Credit: Photo by Paul Schnaittacher