The resolution and ability of the HiRISE camera to take multiple images of the same target has allowed scientists to monitor and detect small-scale changes on the surface of Mars over time.

Some of the linear ripples on these large crescent-shaped dunes in the Nili Patera region are moving, confirming they are active in the current climate conditions.

Written by: Sharon Wilson   (8 June 2011)

More info and image formats at http://hirise.lpl.arizona.edu/ESP_022364_1890

Image: NASA/JPL/University of Arizona