Rocks collected by NASA’s Spirit rover on Mars show evidence of an oxygen-rich atmosphere some 3.7 billion years ago. This is a very strong indicator of life, with scientists describing the ancient Martian environment as “wet, warm and rusty.”
Rocks collected by NASA’s Spirit rover on Mars show evidence of an oxygen-rich atmosphere some 3.7 billion years ago. This is a very strong indicator of life, with scientists describing the ancient Martian environment as “wet, warm and rusty.”
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