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To: tortoise
Interesting. Thanks for that info. But I still can't buy the primordial soup deal. Life is so different from anything else in our world. There is input because of outside forces but nothing explains where Carbon based life forms came from. That old double helix is just too different from anything non living and did not bubble out of a pond IMHO.
453 posted on 05/04/2003 12:43:38 AM PDT by microgood (They will all die......most of them.)
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To: microgood
But I still can't buy the primordial soup deal.

That's fine, because the way most people picture it isn't really consistent with what we do know anyway. In fact, there is only one relatively rare geological formation that is known to bootstrap extremely complex organic molecules at an incredible rate. These are certain types of hydrothermal systems with an unusually rich range of minerals and metals in the surrounding rocks. The only such systems in North America that I am aware of have been discovered in Nevada.

The point being that these types of systems are actually capable of producing the necessary molecules found in living organisms and are energetic and active enough in the catalytic sense that it is a constant cauldron of molecular synthesis. In fact, there are a number of interesting molecular analogs found in these systems, including very close analogs of cellular wall structures found in the most primitive of single-celled organisms, which are produced by a very complex catalytic reaction between certain abundant organics and certain minerals in the rocks. If we were talking about life spontaneously forming in the ocean or by a lightning bolt I would agree, but these types of peculiar hydrothermal systems make it look very viable indeed. There is quite a bit of interest in these systems scientifically, but they are pretty rare largely due to very few regions of the planet having a sufficiently rich and complex mix of minerals and metals.

That old double helix is just too different from anything non living and did not bubble out of a pond IMHO.

DNA is a nice system, and a fairly complex one. However, it is worth noting that there have been many, many self-replicating "genetic" molecular systems discovered by chemistry that don't appear in any lifeforms. DNA is just one of many (nearly infinite) chemical structures with its properties; one could argue that if it wasn't one, it would be another.

456 posted on 05/04/2003 1:03:50 AM PDT by tortoise
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