Living organisms leave a huge geochemical imprint on the planet, a new taxonomic system reveals. It might help identify other worlds with life.
“Each one of those kinds of pyrite is telling us something different about our planet, its origin, about life, and how it’s changed through time,” said Hazen.
Morrison and Hazen also identified 57 processes that individually or in combination created all known minerals. These processes included various types of weathering, chemical precipitations, metamorphic transformation inside the mantle, lightning strikes, radiation, oxidation, massive impacts during Earth’s formation, and even condensations in interstellar space before the planet formed.
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