From Space.com
Life Detection on Mars: Are Red Planet Protocols in Place?
https://www.space.com/39650-mars-lif...n=20180209-sdc
"Finding evidence for life on Mars has been a decades-long ambition for NASA, which has spent billions of dollars to send machines wheeling over, poking and probing the Red Planet. But once the signs of life are found, how are those findings verified?..."
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