Cover picture: Immunofluorescent staining for ephrin-B2 (green) and fibronectin (red) in the uninjured spinal cord of the adult rat. Ephrin-B2-positive glial end feet of white matter astrocytes contact the fibronectin-positive meningeal fibroblasts on the pial surface of the spinal cord. The fibroblasts also express EphB2, a receptor for ephrin-B2. Cell contact-mediated bidirectional signaling between ephrin-B2 on astrocytes and EphB2 on meningeal fibroblasts may be involved in formation of the glial limitans under normal conditions as well as after spinal cord injury. For details, see the article by Bundesen et al. in this issue (pages 7789–7800).