A planet's atmospheric constituents (e.g., O2, O3, H2O, CO2, CH4, N2O) can provide clues to its surface habitability, and may offer biosignature targets for remote life detection efforts.
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Biosignatures & Paleobiology: October 2018
Ecosystem-bedrock interactions power the biogeochemical cycles of Earth shallow crust, supporting life, stimulating substrate transformation, and spurring evolutionary innovation.
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