Cover legend: Ventral view of fiber tracts in the brain of an adult human with agenesis of the corpus callosum. Callosal fibers bridging the left and right hemispheres are notably absent, but typical restingstate functional activity is preserved. This visualization was derived from high-resolution diffusion tensor magnetic resonance imaging data. For more information, see the article by Tyszka et al. in this issue (pages 15154–15162).