Sol 2848 and Sol 2853

  a little sand movement, Sol 2848 (2 frames) and Sol 2853 (3 frames)

https://www.space.com/mars-dust-devil-curiosity-rover.html

https://mars.nasa.gov/msl/multimedia/raw-images

Sol 2853

https://mars.nasa.gov/msl/multimedia/raw-images

one more newer image:

odd form

sadly only a cosmic ray burst 

The discoveries awaiting us in the ocean's twilight zone | Heidi M. Sosik

The discoveries awaiting us in the ocean's twilight zone | Heidi M. Sosik

What are hydrothermal vents? Woods Hole Oceanographic Institution

What are hydrothermal vents?  Woods Hole Oceanographic Institution