A piece of Mars: This 600×450 m (1969×1476 ft) scene of a hillside shows new, dark dustslides that slid downhill (to the lower left). Faint stripes of older dustslides are visible, covered by bright dust and small ripples. Thousands of these form every year on Mars, stretching several kilometers downslope – there is nothing quite like this here on Earth! (HiRISE ESP_038387_1855, NASA/JPL/Univ. of Arizona)