A piece of Gale crater, Mars: Here is a tiny piece of feathery terrain way up high on Mt. Sharp, the mountain that Curiosity will one day climb. This is a special unit of fine-grained material that has weathered into a distinct feather shape by winds from the northeast. At high resolution, grooves carved by this wind are still visible, and blueish sand indicates that this erosive process is likely still active. (HiRISE ESP_028335_1755)