The network of cracks in this Martian rock slab called "Old Soaker" may have formed from the drying of a mud layer more than 3 billion years ago.
The network of cracks in this Martian rock slab called "Old Soaker" may have formed from the drying of a mud layer more than 3 billion years ago. NASA/JPL-Caltech/MSSS
The network of cracks in this Martian rock slab called "Old Soaker" may have formed from the drying of a mud layer more than 3 billion years ago. NASA/JPL-Caltech/MSSS
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NASA Curiosity rover examines possible mud cracks on Mars, shares pictures

January 18, 2017 08:54 AM