Re: Origins of Life on Earth

From: Reason (Landrew_at_iaf.net)
Date: 10/02/04 

Date: Sat, 2 Oct 2004 17:27:56 +0000 (UTC)

"TomHendricks474" <tomhendricks474@cs.com> wrote in message
news:cj4nbi$1t3u$1@darwin.ediacara.org...
>> But the consensus today is Earth's early
>>atmosphere was not a reducing atmosphere but one filled mainly with
>>carbon dioxide and nitrogen.
>
> Maybe not. I've reported a study that says there is not enough carbon
> buried if
> the atmosphere was the CO2 that the new scenario suggests.
> So we may be back to the Miller experiment atmosphere.
>

It's still a good assumption. Most planets have reducing atmospheres, being
formed that way when the star systems are formed. It's hard to imagine how
a planet can convert to an oxidizing atmosphere without the presence of
organisms such as anaerobic bacteria.

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