Jih Marsu – vrstvenà sedimentů (MARSIS). Spodnà obrázek poÅ™Ãdil radar SHARAD (MRO). Kredit: MARSIS: ESA/NASA/ASI/JPL-Caltech/University of Rome; SHARAD: NASA/JPL-Caltech/ASI/University of Rome/Washington Universtiy in St. Louis