Cover legend: Mouse spinal cord (horizontal section) 3 weeks after injury. Iba1 + macrophages (red) accumulate at the lesion and along degenerating rostral sensory tracts. GFAP + astrocytes (green) form a scar the border of the lesion. Nuclei are identified by DAPI (blue). For more information, see the article by Gaudet et al. (pages 8516–8532).