False-coloring this image makes a giant dune and its gullies look blue.
A possible landing site for the ExoMars 2020 mission, which the European Space Agency is running.
A North Pole dune field nicknamed “Kolhar,” after Frank Herbert’s fictional world.
Carbon dioxide that turns from solid to gas carves out these strange shapes at Mars’ south pole.
“Spiders” are eruptions of dust caused by the way the Martian surface warms and cools.