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Mars’ latest mysteries During the first half of April 2018, Opportunity focused her cameras and her time on the
unusual, textured rocks of San Juan Pueblo in the southern border of the south fork in
Perseverance Valley. These holey things could be impact melt, rocks that were
instantaneously melted by the high pressures and temperatures created when the
asteroid or comet or meteor that created Endeavour hit. Or they could be weathered or
perhaps thickly coated and then eroded, or they could be another new type of Martian
rock. The science team’s investigation is underway. NASA / JPL-Caltech / Cornell / ASU