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Loading contentChemical fingerprints of life in rock or ice — the isotopic ratios life prefers, the handedness (chirality) of its molecules, and specific organic byproducts — the kind of evidence the Perseverance rover seeks and caches on Mars.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.