The discovery of bacteria inside rocks under the ocean surface suggests life on Mars may be more likely than previously believed. If these microscopic beings could thrive in these conditions on Earth, researchers theorize, lifeforms may have also formed within similar structures on the Red Planet. The bacteria were found inside thin cracks in rocks recovered from under the ocean floor beneath the Pacific Ocean. The team which made the finding believes the cracks could host collections of bacteria as rich and diverse as the human gut — roughly 10 billion cells per cubic centimeter (0.06 cubic inches). This is…

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