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NASA has just announced two major breakthroughs in the search for life on Mars: the first is that the Mars Curiosity rover has detected the presence of organic molecules preserved within the bedrock of the Martian soil; the other is that Curiosity has also detected a wide variation in the amount of methane present in the Martian atmosphere that fluctuates with the planet’s seasons. Although NASA cautions that these phenomena could ultimately have non-biological origins, they add to the growing evidence that Mars, once home to a habitable environment, might very well have had lifeforms of its own–lifeforms that may still be living there today.
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