Naked Science Forum
General Science => General Science => Topic started by: turnipsock on 26/05/2008 00:42:50
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The Earths atmosphere is made up of about 80% Nitrogen...where does that come from?
Oxygen and Carbon Dioxide come from various sources, but Nitrogen never gets a mention...why?
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"In the beginning ..."
I'll be unable to give much of a rational explanation except to mention the assumption that the original atmosphere of earth was mostly a methane-ammonia concoction. Were it not weighted heavily to the ammonia end, life would not have formed Amino acids, the building blocks of life, which are made of a carboxyl group(s) and an ammonia atom (with one hydrogen missing).
Yet all of this is just the accepted speculation of 3-4 generations of organic life scientists - I know of little concrete evidence from the fossile record of the conditions of the atmosphere during the Archean geologic period.
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The glib answer is that it came from the same stars that made the carbon and the carbon. There is just quite a lot of nitrogen around in the universe