A rock sample collected by NASA’s Perseverance Mars rover may contain evidence of ancient microbial life, preserved for billions of years on the Red Planet. The potential “biosignature” is not direct evidence of life itself, but rather a possible sign that textural features on the rock may have biological origins. “This finding by our incredible Perseverance rover is the closest we’ve actually come to discovering ancient life on Mars,” Nicky Fox, associate administrator of the

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