Those crazy Martians!!!
(http://i16.photobucket.com/albums/b26/flagator/Marsmysteryrock_zps8c9ccade.jpg)
After a decade of exploring the Martian surface, the scientists overseeing veteran rover Opportunity thought they’d seen it all. That was until a rock mysteriously “appeared†a few feet in front of the six-wheeled rover a few days ago.
News of the errant rock was announced by NASA Mars Exploration Rover lead scientist Steve Squyres of Cornell University at a special NASA Jet Propulsion Laboratory “10 years of roving Mars†event at the California Institute of Technology (Caltech), Pasadena, Calif., on Thursday night. The science star-studded public event was held in celebration of the decade since twin rovers Spirit and Opportunity landed on the red planet in January 2004.
Whole story is here (http://www.foxnews.com/science/2014/01/17/mystery-rock-appears-in-front-mars-rover/?intcmp=features)