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Mars Exploration

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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.

NASA Reports Potential Biosignatures in Jezero Crater Core

Perseverance Detects Potential Biosignature in Jezero Crater Rock