Keywords: mars nasa mro jpl landscape science space geology blackandwhite monochrome texture outdoor black and white Lace on Mars: Channels formed by sublimation of a layer of seasonal dry ice are so dense in this area that they look like lace. NASA/JPL/University of Arizona (5 km across; www.uahirise.org/ESP_046414_0990) Lace on Mars: Channels formed by sublimation of a layer of seasonal dry ice are so dense in this area that they look like lace. NASA/JPL/University of Arizona (5 km across; www.uahirise.org/ESP_046414_0990) |