Curiosity Finds Organic Molecules That Could Have Been Produced by Life on Mars

What do coal, crude oil, and truffles have in common? Go ahead. We’ll wait. The answer is thiophenes, a molecule that behaves a lot like benzene. Crude oil, coal, and truffles all contain thiophenes. So do a few other substances. MSL Curiosity found thiophenes on Mars, and though that doesn’t conclusively prove that Mars once …

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