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Curiosity Mars rover spots distinctive hexagonal mud cracks on the planet, NASA shares pics

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Image Credit: instagram

NASA's Curiosity Mars rover has spotted distinctive hexagonal mud cracks on Mars that scientists speculate may offer the first evidence of wet-dry cycles on the planet. One of the prevailing theories as to how life began on Earth is that persistent cycles of wet and dry conditions on land helped kickstart the complex chemical building blocks necessary for microbial life.