Reflections on O2 as a Biosignature in Exoplanetary Atmospheres

@inproceedings{Meadows2017ReflectionsOO,
  title={Reflections on O2 as a Biosignature in Exoplanetary Atmospheres},
  author={Victoria S. Meadows},
  booktitle={Astrobiology},
  year={2017}
}
Oxygenic photosynthesis is Earth's dominant metabolism, having evolved to harvest the largest expected energy source at the surface of most terrestrial habitable zone planets. Using CO2 and H2O-molecules that are expected to be abundant and widespread on habitable terrestrial planets-oxygenic photosynthesis is plausible as a significant planetary process with a global impact. Photosynthetic O2 has long been considered particularly robust as a sign of life on a habitable exoplanet, due to the… CONTINUE READING
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