Re: Geologists Uncover New Evidence About the Rise of Oxygen on Earth (Forwarded)
- From: Daggaz <dagz01tmp@xxxxxxxxxxxxxxx>
- Date: Fri, 28 Oct 2005 16:24:50 +1000
On 27 Oct 2005 08:09:55 -0700, John Curtis wrote:
|
|jgreen@xxxxxxxxxxx wrote:
|> Andrew Yee wrote:
|> > Media Relations
|> > Caltech
|> >
|> > Contact:
|> > Robert Tindol, (626) 395-3631
|> >
|> > October 24, 2005
|> >
|> > Geologists Uncover New Evidence About the Rise of Oxygen
|> >
|> > PASADENA, Calif. -- Scientists believe that oxygen first showed up in
|> > the atmosphere about 2.7 billion years ago. They think it was put there
|> > by a one-celled organism called "cyanobacteria," which had recently
|> > become the first living thing on Earth to make oxygen from water and
|> > sunlight.
|>
|> So what happened to the H2?
|>
|Escaped into space.
|http://66.102.7.104/search?q=cache:zBRrPKSaxEIJ:www.astro.washington.edu/endsofworld/+%22The+ultraviolet+glow+of+hydrogen+escaping+from+the+Earth%22&hl=en
|John Curtis
Wrong. In photosynthesis the hydrogen obtained from water is incorporated
into organic matter.
You are thinking of the H2 produced from ultraviolet dissocation of water.
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