Ventral surface of the skate Raja prepared by Alcian Blue and Alizarin Red staining for cartilage and bone, respectively. Note the additional staining of the ampullary canals surrounding the face. This image, taken by David Gold, Lynn Kee and Meghan Morrissey at the 2011 Woods Hole MBL Embryology Course, was chosen by readers of the Node to be the cover for Development (thenode.biologists.com)