The Case of the Martian Boulder Piles Mar 6, 2018 nasaboy ⋅ NASA POTD, Space ⋅ NASA Pictures ⋅ No comments This image was originally meant to track the movement of sand dunes near the North Pole of Mars, but what’s on the ground in between the dunes is just as interesting! Like 0 Thanks! You've already liked this 80 views Leave a Reply CancelYou must be logged in to post a comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.