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Sedimentary Rocks

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Perseverance’s ‘Leopard-Spot’ Rock Tagged a Potential Biosignature as Fresh Skepticism Surfaces

Researchers say only Earth lab tests on Perseverance’s sealed Sapphire Canyon sample can determine whether biology or geology made the patterns.

Perseverance Maps Repeated Habitable Water Episodes in Jezero, Study Finds

Geologists Uncover Key Evidence of Ancient Global 'Snowball Earth'