Climate change: sudden cooling (Introduction)

by David Turell , Sunday, May 18, 2014, 23:00 (3819 days ago) @ David Turell
edited by unknown, Sunday, May 18, 2014, 23:56

David 
> > > Your video I've just reviewed. Lots of acurate organic chemistry and lots of wishful thinking.
> > Romansh:Or an incrediple perceptive imagination
> 
> Just lots of imagination with huge sections to be filled in inbetween the assertions.
> > >The current RNA studies on RNAzymes have reached the correct replication rates of about 99+%, not accurate enough for life, but an improvement over the first 95% models, after searching thru trillions of possible molecules.
> 
> > http://www.newscientist.com/article/dn25471-spark-of-life-metabolism-appears-in-lab-wit... 
 The story is filled with hoopla and the usual provisos:
 
 "In all, 29 metabolism-like chemical reactions were spotted, seemingly catalysed by iron and other metals that would have been found in early ocean sediments. The metabolic pathways aren't identical to modern ones; some of the chemicals made by intermediate steps weren't detected. However, "if you compare them side by side it is the same structure and many of the same molecules are formed," Ralser says. These pathways could have been refined and improved once enzymes evolved within cells.
 
 "There is one big problem, however. "For origins of life, it is important to understand where the source molecules come from," Powner says. No one has yet shown that such substances could form spontaneously in the early oceans.
 
 "A related issue is that the reactions observed so far only go in one direction; from complex sugars to simpler molecules like pyruvate. "Given the data, one might well conclude that any organics in the ocean would have been totally degraded, rather than forming the basis of modern metabolism," says Jack Szostak, who studies the origin of life at Harvard. "I would conclude that metabolism had to evolve, within cells, one reaction and one catalyst at a time."
 
 Again our friend skeptical Jack.
> 
> 
> > > David: So far, I have not seen that efforts to define life have contributed at all to that understanding." http://www.jbsdonline.com. 
> 
> 
> > Romansh: Here I agree with you ... life is like pornography ... I know it when I see it ... to quote a Judge whose name escapes me.
 
 Justice Stevens in the famous Supremes pornography case.
> 
> 
> > >David; Basically at 4 billion years lava, rocks and some water. Some organic material arrived by meteorite. How did the video author know that organic material was plentiful?
> > Romansh How do we know it was insufficient. Organic compounds can be made abiotically, this has been known for over a hundred years.
 
 But as Szostak points out which ones?
> 
> 
> > > David Meteorite analysis, Murchison for example, have shown only eight essential amino acids, not 20. 
> > Romansh: Who suggests all early life had all 20 amino acids?
 
 Agreed.
> 
> > > David:All living amino acids are left handed. Meteorite amino acids are 53% left and 47% right in a study last year.
> 
> > Romansh: I would suggest a small difference in the availability of the early enantiomer would provide early life a sufficient drive to out replicate right handed enantiomer producers.
 
 That is pure guess work and wishful thinking
> > 
> > > David: All Ribose molecules in life are right handed, facts the video did no discuss.
> 
> > Romansh: So what? That life can produce a specific handedness today is irrelevant. We are trying to work out what might have happened over 3.5 Gy ago.
 
 So life started out with both handednesses, and then chose left? I would think life did not change in midstream
> > 
> > > In conclusion, don't accept videos with beautiful symphonic and operatic musical background without deeply researching the subject yourself. OOL is a vital piece of the evidence in discussing agnoticism or theism. And it still looks miraculous to Paul Davies, who is now is sounding more and more like a diest.
> > Romansh: If you reread my question I was not asking you to accept it?-Agreed, but it implied acceptence.
> > 
> > > David: And finally from the video, how does information appear out of nowhere? A code suddenly invents its own information? Poppycock!
> 
> > Romansh;Information came when mankind created the concept.
 
 Inadequate sidestep. Information is information with or without mentation.
> > 
> > Romansh: Remember there is more information in a random set of events than there is a repeating set of events. It just harder to work out the key for the random set.
 
 Agreed. A crystal is ordered,but simple. Information required for life is very complex.