This confocal image of a sagittal section of the mouse cerebellum shows mossy fiber terminals (red, green, yellow) from Clarke's column neurons in the spinal cord, which synapse onto granule cells (blue) in the cerebellum. Sparse labeling of lower thoracic to lumbar Clarke's column neurons (green or yellow) reveals that Clarke's column neurons extensively expand and distribute proprioceptive information across several discrete lobules, allowing parallel processing across several domains. For more information, see the article by Pop et al. (pages 581–600). Cover image: Iliodora Pop.