HiRISE: High Resolution Imaging Science Experiment http://uahirise.org Image updates from the HiRISE camera onboard the Mars Reconnaissance Orbiter (MRO/NASA) en-us editor@uahirise.org (Ari) Thu, 23 Mar 2017 13:30:00 MST Dunes of the Southern Highlandshttp://uahirise.org/ESP_049371_1380 The Hellespontus region features numerous collections of dark, dune formations that collect within depressions such as craters. HiRISE 8K: 23 Mar 2017 https://flic.kr/p/RYb96e Sinus Sabaeus Region.