19 Sep 2012 - Opportunity Update

[NASA]

http://solarsystem.nasa.gov/missions/images/miss-mer_a-mp.jpg (http://solarsystem.nasa.gov/news/display.cfm?News_ID=40903)19 Sep 2012 - Opportunity Update
Opportunity is continuing the in-situ science campaign at a putative location of clay minerals.


More... (http://solarsystem.nasa.gov/news/display.cfm?News_ID=40903)

[Flash]

While curiosity driving around on Mars, the old Opportunity is still making new discovery, namely weird spheres in concentration. Scientists are baffled and do not know that this is. Here a bit of the article

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Opportunity has seen Martian blueberries at many of its science sites during its Red Planet exploits, but the bumpy, spherical formations on the Kirkwood rock represent something new, researchers said. In Opportunity's new photo, many of the strange features are broken, revealing odd concentric circles inside.

"They seem to be crunchy on the outside, and softer in the middle," Squyres said. "They are different in concentration. They are different in structure. They are different in composition. They are different in distribution. So, we have a wonderful geological puzzle in front of us." [7 Biggest Mars Mysteries]
http://www.livescience.com/23248-mar...adline+Feed%29