Originally posted by RealNC
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God steals your $10
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Originally posted by highlandsun View PostIf you accept the hypothesis that their working cells simply reproduce the environment of earth some millions of years ago, then no. But you could of course argue that their hypothesis about earth is wrong, or that it took a designer to create the earth. Whatever.
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Originally posted by justsumdood View Postisn't it quite possible that man created God in his own image?
People are very touchy about God, and they might kill you for saying that....
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Originally posted by Darkfire Fox View PostEven if scientists manage to create a fully functional cell in a laboratory, all that will prove is that it took intelligent designers to create that cell.
Unfortunately, basic chemistry gets in the way of a naturalistic origin for the first cells. At the very least, cells need RNA, DNA, and Protein.
Ribose and deoxyribose are sugars, and protein is made of amino acids. Left to themselves, sugars and amino acids will spontaneously destroy each other. They won't co-exist long enough in an aqueous solution in order to form RNA, DNA, and protein. Our cellular machinery prevents this. Machinery made of protein and encoded by RNA and DNA ...
In addition, all amino acids created "in the wild" (abiotically) are racemic. They have equal proportions of the right-handed and left-handed mirror forms. Life on Earth uses the left-handed variant aminos exclusively. Otherwise, the alpha-helices and beta-pleats of our protein chains would have side chains sticking out all over the place, ruining them.
Similarly, all sugars created "in the wild" (abiotically) are also racemic, having equal proportions of the right-handed and left-handed mirror forms. Life on Earth uses the right-handed variant sugars exclusively. Otherwise, starch and cellulose would have the same side-chain problem as proteins.
Lastly, on a presumably anaerobic primordial earth, the primordial oceans would have relatively high concentrations of divalent iron, calcium, and magnesium. If you bathe/shower with "hard water" then you are probably quite familiar with soap scum! Nucleic acids, amino acids, and fatty acids would likely be precipitated out of solution before they could do anything useful.
(Also, an oxygen-less early earth would have no ozone. No ozone means lots of UV radiation, further ruining my ancestral pond water. The first life trying to develop near an underwater volcano [a pet favorite for many biologists] would suffer the same problems as above, and the added heat would speed up the destruction )
It's already been proven that RNA can form spontaneously. Given millions of years, it's possible for all the ideal conditions to exist in some pocket of the environment, even if the environment in general is not conducive.
You're also overlooking the demonstrated mechanisms for spontaneous formation of cell membranes - these don't require complex proteins to form, they just require a difference in viscosity between two regions of liquid, like oil+water. Once you have that you have the possibility for molecules to continue reacting/evolving inside a "cell" independent of changes in the environment.
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