Re: OOL II - Building Blocks


[snipped]
> > > JM:- The Miller experiment is of absolutely no interest in any
scientific
> > > theory regarding the origin of life on earth.
> >
> > OUCH. We differ here. I think what the M-U experiments showed
beyond a
> > doubt is that a heat cycle using UV/Sun began the origin process.
>
> You also should read Shapiro (again?). Pay attention to what he says
about
> Myth being self-validating.

Myth aside, even Miller has updated. See
2The+Stability+of+the+RNA+Bases%22&searchid=1084296464824_6204&stored_search=&FIRSTINDEX=0Here he suggests a very cold temp as the only possible ones to produce
the needed bases.

As to 'soup', I still like the idea, and will add this - the prebiotic
'soup'
is very temperature dependent - so what chemistry goes at any temp is
in a sense
a 'symbiotic' soup with their symbiotic nature being that they all are
stable
at a certain temperature range.

>
> > He, Miller used lightning (it was easier and more Frankensteinian!
-
> > but he also used it in a precise way that would NOT recreate
> > nature. No broth could be hit with such lightning regularity! Folow
ups
> > that used UV/sun work well and we know the sun was there and shined
on a
> > very regular basis.
> > I again challenge you by asking if your chemistry could happen
without
> > a sun/star?
>
> Well vent chemistry takes place several miles below sea level, and
perhaps even
> several miles below the ocean floor. The sun is completely
irrelevant in this.
> These processes would still take place if the Earth were parked in
interstellar
> space.
>
> Well, let me add a couple of reservations to that. One is that the
Earth probably
> couldn't have formed in interstellar space. The sun is probably
essential for that.
> The second is that liquid ocean water may be a necessary lubricant
for subduction.
> If the oceans froze (as they would if the earth were not warmed by
the sun), the
> vents would still eject hot water. But they might stop running
within a few million
> years if the subduction stopped.

Good. Also I believe tinyurl asked about why I thought there must also
be a
wet/dry cycle - which might rule out underwater OOL.

Icarus 168 (2004) 18-22
www.elsevier.com/locate/icarus
Fast tidal cycling and the origin of life
Richard Lathe

And while I'm tying up some loose ends for comments, I very much liked
your PIP idea about frozen life surviving the meteors. And I am
enjoying
your OOL posts very much - my job is to bring some light (read Sun)
into
the discussion Ha ha.


.

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