image: Matthew Mihlbachler records tooth cusp sharpness in a fragment of a 14 million-year-old fossil horse skull at the American Museum of Natural History. 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: Image courtesy of Matthew Mihlbachler