A rare photo of the Pepper Dog sleeping during the day.
Nervous system of a 5 mm long juvenile medaka (Japanese killifish) outlined in fluorescently-labeled tubulin, the beta form of which is expressed only in neural tissue. Light sheet microscopy
Credit: Philipp J. Keller, HHMI Janeli Farm, and Lazaro Centanin and Annette D. Schmidt, EMBL