CAPE CANAVERAL, Fla. (AP) -- New Mars discoveries are advancing the case for possible life on the red planet, past or even present.
Scientists reported Thursday that NASA's Curiosity rover has found potential building blocks of life in an ancient Martian lakebed. Hints have been found before, but this is the best evidence yet.
The organic molecules preserved in 3.5 billion-year-old bedrock in Gale Crater — believed to once contain a shallow lake the size of Florida's Lake Okeechobee — suggest conditions back then may have been conducive to life. That leaves open the possibility that microorganisms once populated our planetary neighbor and might still exist there.
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