The Digital Morphology library, part of the National Science Foundation Digital Libraries Initiative, is a dynamic archive of information on digital morphology and high-resolution X-ray computed tomography of biological specimens. Digital Morphology, part of the National Science Foundation Digital Libraries Initiative, develops and serves unique 2D and 3D visualizations of the internal and external structure of living and extinct vertebrates, and a growing number of 'invertebrates.' The Digital Morphology library contains nearly a terabyte of imagery of natural history specimens that are important to education and central to ongoing cutting-edge research efforts.