The Big Picture: THE SURFACE OF MARS
More specifically:

Intersecting swirling trails left by the earlier passage of dust devils across sand dunes, as they lifted lighter reddish-pink dust and exposed the darker material below. Also visible are darker slope streaks along dune edges, formed by a process which is still under investigation.

ARE YOU FING KIDDING ME? IF YOU DON’T THINK THIS IS AWESOME. STOP READING THIS BLOG NOW. UNFOLLOW PLZ.
More pictures at Boston.com

The Big Picture: THE SURFACE OF MARS

More specifically:

Intersecting swirling trails left by the earlier passage of dust devils across sand dunes, as they lifted lighter reddish-pink dust and exposed the darker material below. Also visible are darker slope streaks along dune edges, formed by a process which is still under investigation.

ARE YOU FING KIDDING ME? IF YOU DON’T THINK THIS IS AWESOME. STOP READING THIS BLOG NOW. UNFOLLOW PLZ.

More pictures at Boston.com