Using 67P/C-G as an anchor, the authors scale cometary xenon inheritance to estimate that comets delivered less than one percent of Earth's ocean water but possibly as much carbon as the entire terrestrial biomass, while warning that common cometary molecules mimic biosignatures.
(94) Quirico, E.; Moroz, L
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Volatile species in comet 67P/Churyumov-Gerasimenko -- investigating the link from the ISM to the terrestrial planets
Using 67P/C-G as an anchor, the authors scale cometary xenon inheritance to estimate that comets delivered less than one percent of Earth's ocean water but possibly as much carbon as the entire terrestrial biomass, while warning that common cometary molecules mimic biosignatures.