Multi-shank NeuroNexus 32- and 64-channel probes were used to record across and through rodent visual cortex, while single-shank NeuroNexus probes spanned lateral regions to enable tracking of receptive fields. Penetrations were marked with DiI. The results by Eugenio Piasini and Liviu Soltuzu et al. in Davide Zoccolan’s group revealed a hierarchy in processing of dynamic visual stimuli that includes increasingly sustained responses by deeper “ventral stream” visual areas.