A vast dune field lies near the northern polar cap of Mars. Seen here in summer, the dunes have partially buried an impact crater about 1,000 3,300 feet wide. This image is from NASA Mars Odyssey.
A vast dune field lies near the northern polar cap of Mars. Seen here in summer, the dunes have partially buried an impact crater about 1,000 3,300 feet wide. This image is from NASA Mars Odyssey.