Orchid Win7 v1 <voi### [at] devnull> wrote:
> Interesting how they say "Mars had more oxygen", as if that's a basic 
> requirement for all living organisms.

AFAIK oxygen is pretty much required for multicellular organisms.
It's about the only molecule that has the properties just right so that
it can act as a "fuel" for multicellular metabolism.

For unicellular organisms, not so much. Life on Earth almost died
completely because some organisms started to produce oxygen as a
by-product they didn't need.

-- 
                                                          - Warp

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