This image shows spontaneous correlated firing of spiral ganglion neurons in the developing mouse cochlea. Five discrete events were pseudo-colored based on time of occurrence to highlight the spatial activation of neurons that will ultimately process similar frequencies of sound. ATP release and subsequent P2RY1 activation on nonsensory supporting cells initiates burst firing of inner hair cells that propagates to the central auditory system via the spiral ganglion neurons. For more information, see the article by Babola et al. (pages 594–612). Cover Image: Zhirong Wang and Travis Babola.