as to miller and urey, so what if they got the atmosphere wrong. it was wrong in proportion of what was there, and it was the best estimate at the time. newer experiments, using newer models of the early earth atmosphere, also produced amino and nucleic acids, just not in as large a quantity. so they proved thier initial point--inorganic can yield to organic.
Sure, but there's a couple of little oft-glossed over details that are kind of important:
First, Miller Ulrer's experiment and subsequent one's have all assumed chemical compositions that are just that - assumptions.
Second, these experiments have been subjected to continual energetic input (Usually in the form of electric current). this is in contrast to the occasional (not constant) input the pre-biotic soup would have received from occasional lighting storms (yes, current researches of the pre-biotic soup hypothesize that waves among other things may have been the constant sourve of energy but that is a model that has been largely unverified)
Third, the success of these experiments has been dependent upon the removal of the compound molecules from the solution from which they were formed - lest they be destroyed by it.
Fourth, the amino acids formed by these experiments constitute a very small number of those needed for life.
Conclusion? The occurrence of a few man-generated amino acids given very specific assumed conditions and undergoing constant energetic stimulation AND being artificially sheltered from the very solution they were formed in and from is a given...congratulations!!
Does that type of experiment tell us anything about the likelihood that ALL of the neccessary amino acids developed spontaneously from a composition of chemicals that can only be assumed, not proven, undergoing sporadic energetic input, being subjected and deriving from a solution that by it's very nature would destroy them?
It tells me that it likely didn't happen..But of course I would say that, I'm a creationist; but consider this quote from Scientific American:
In July 1999, Scientific American presented a new theory that life on Earth was seeded by comets and reported that "New evidence has drawn the components of Miller's atmosphere into question."
Looks like i'm not the only one...
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