black and white lichen and more. Black spots, typically caused by algae, moss, or mould, can make patios appear dirty and neglected and are notoriously hard to remove. Black spots cause problems ...
Microbial activity? NASA’s Perseverance Rover discovers a rock with mysterious Green spots on Mars
Using its SHERLOC WATSON camera, the image showed white, black, and greenish spots in the rock, intriguing scientists. On Earth, green spots in red rocks sometimes develop due to microbial ...
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