No one has yet had a chance to stand on Mars and test out just how the breeze feels up there. All the same, scientists are able to tell that the winds up there are pretty active. How? Simple, they caught it in pictures.
These two shots of Nili Patera, a Martian dune known for being a particularly windy spot on the red planet, were taken four months apart by the HiRISE camera. By looking at both the boundaries of the dunes and the ripples that move across the sands, scientists are able to get a sense of just how strong the winds really are on Mars.
Image: NASA / HiRISE / University of Arizona