Cover legend: Digitally reconstructed rat cerebellar climbing fibers arbitrarily placed on a sample parasagittal section and colored by morphologically differentiated branch types: primary (purple), tendril (red), retrograde (maroon), and distal (green). Radius thickened 4× for clearer visualization. Climbing fiber histology anterogradely stained with biotinylated dextran amine and interneuron somata counterstained with thionine (blue). Histology has been digitally washed-out to increase contrast with climbing fiber reconstructions. For more information, see the article by Brown et al. (pages 14670–14684).