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Unusual compounds in rocks on Mars may be sign of ancient microbial life | Mars

Surface spots and nodules on rocks in ancient river valley are described in new study as ‘potential biosignatures’

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NASA hasn't found life on Mars yet – but signs are promising

Possible clues to past life on Mars identified in rocks found by rover | Detailed image analysis of speckled rocks found by the Perseverance rover has confirmed a “potential biosignature.”

A rock found last year on the surface of Mars offered tantalising evidence that life once existed on the Red Planet. Now scientists have found yet more evidence that could point to the existence of ancient organisms - but we can't know for certain without returning samples to Earth

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