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Ancient Life on Mars
September 16 , 2025
14 hrs 0 min
22
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- Scientists analysed a Mars rock sample called Sapphire Canyon from Jezero Crater.
- It contains vivianite and greigite, minerals linked to microbial activity on Earth.
- These minerals appear in a spotted pattern called “leopard spots” formed by redox reactions.
- Redox gradients may be driven by microbes or by nonbiological processes under certain conditions.
- No signs of heat or acidity suggest that a biological origin for these minerals is possible.
- The sample is a potential biosignature and may indicate ancient microbial life on Mars.
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