Video: NASA finds more evidence for past life on Mars
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New Mars discoveries are advancing the case for possible life on the red planet, past or even present. NASA's Curiosity rover has found potential building blocks of life in an ancient Martian lakebed -- the best evidence yet of possible life. The organic molecules preserved in 3.5 billion-year-old bedrock in Gale Crater suggest conditions back then may have been conducive to life. This suggests that microorganisms once populated our planetary neighbour and may still exist there.