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Politics : Evolution -- Ignore unavailable to you. Want to Upgrade?

To: average joe who wrote (21090)	2/10/2012 12:06:33 AM
From: Solon	1 Recommendation Read Replies (1) \| Respond to of 69300

If I ever bred a bunch of cows I would not insist that they loved me. Of course, if I ever found out one of them had never heard of me or liked Zeus or Thor better...THEN I would have to hurt that cow and hurt it damn bad. Maybe drown it or burn it--all the calves, too. OK. So I AM a bit preoccupied with me. I just NEED to be loved loved loved! And you always hurt the one you love--right?? And I have loved every single cow that ever mooed--even the ones who slept in their own poo poo.

To: average joe who wrote (21090)	2/10/2012 1:32:43 AM
From: Solon	2 Recommendations Read Replies (1) \| Respond to of 69300

sciencedaily.com According to Deamer, life began with complex systems of molecules that came together through the self-assembly of nonliving components. A useful metaphor for understanding how this came about, he said, can be found in combinatorial chemistry, an approach in which thousands of experiments are carried out in parallel by robotic devices. "I look at the origin of life as the result of combinatorial chemistry on a global scale," said Deamer, a research professor of chemistry and biochemistry at UCSC who is also affiliated with the Department of Biomolecular Engineering in UCSC's Jack Baskin School of Engineering. The power of combinatorial chemistry lies in the vast numbers of structurally distinct molecules that can be synthesized and tested at the same time. Similarly, conditions on the early Earth allowed not only the synthesis of a wide variety of complex organic molecules, but also the formation of membrane-bound compartments that would have encapsulated different combinations of molecules. "We have made protocells in the lab--artificial compartments containing complex systems of molecules," Deamer said. "The creationists charge that it's too unlikely for the right combination to have come together on its own, but combinatorial chemistry gives us a better way to think about the probability of life emerging from this process." Life began when one or a few protocells happened to have a mix of components that could capture energy and nutrients from the environment and use them to grow and reproduce. Efforts to replicate this process in the laboratory are still in their infancy, but Deamer said he is optimistic that scientists will eventually be able to assemble a living cell from a parts list and thereby achieve a better understanding of how life began. The first forms of life did not evolve in the usual sense, he said, but simply grew. "Evolution began when large populations of cells had variations that led to different metabolic efficiencies," Deamer said. "If the populations were in a confined environment, at some point they would begin to compete for limited resources." The first evolutionary selection processes would have favored those organisms that were most efficient in capturing energy and nutrients from the local environment, he said. In his talk at the AAAS meeting, Deamer will outline the conditions that scientists think were necessary for life to emerge on the early Earth. He is currently working on a book about the origin of life to be published by UC Press.