Re: OT: Carbon Dioxide races -> known vs unknown -> terraforming mars -> is or is not
This reminds me of something I once read about atmosphereic formation on earth. Seems like a different atmosphere on a planet could be a function of its age, or if it has life or not. IIRC, earth's atomsphere was a highly toxic combination of volcanic gases and such before early single celled life "terraformed" earth into the oxygen-enriched enviroment we have today.
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