HiRISE: High Resolution Imaging Science Experiment https://uahirise.org Image updates from the HiRISE camera onboard the Mars Reconnaissance Orbiter (MRO/NASA) en-us editor@uahirise.org (Ari) Wed, 23 Aug 2017 12:00:00 MST A World of Snowy Duneshttps://uahirise.org/ESP_050703_2560Over the winter, snow and ice have inexorably covered the dunes in the Martian Northern hemisphere.