The University of Wisconsin, the University of Michigan, and the National Museum of Health and Medicine have come together to assemble one of the world's largest collections of well-preserved mammalian brains. Now readers can access photographs of the brains of over 100 different species and view stained sections of a variety of brains, including those of humans, sea lions, and otters. Readers can scout the site by the List of Specimens, which is organized both by common name and scientific name or read selections about Brain Sections, Brain Evolution, and Brain Development, among other topics. This site will be of interest to biology teachers or anyone with an interest in the fascinating world of mammalian brains.