20th Place: Simon Merz, Lea Bornemann & Sebastian Korste, University Hospital Essen, Institute for Experimental Immunology & Imaging, Essen, Nordrhein-Westfalen, Germany. Blood vessels of a murine (mouse) heart following myocardial infarction (heart attack). Tissue Clearing, Light Sheet Fluorescence Microscopy, 2x (Objective Lens Magnification). (Photo by Simon Merz/Nikon's Small World 2019)
