The Micro-Tomographic Atlas of the Mouse Skeleton provides a unique systematic description of all calcified components of the mouse. It includes about 200 high resolution, two- and three dimensional m CT images of the exterior and interiors of all bones and joints. In addition, the spatial relationship of bones within complex skeletal units (e.g., skull, thorax, pelvis, extremities) is also described. The images are accompanied by detailed explanatory text, thus highlighting special features and newly reported structures. With mice becoming a standard laboratory animal and the rapidly increasing use of m CT technology as a key analytical tool in skeletal research, the Atlas fulfils an emerging need for a comprehensive reference to assist both trained and in-training researchers.