grmcdorman
Graduate Poster
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- Mar 21, 2007
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Hot on the heels of the article I just pointed out in the Toronto Star that was (mostly) favourable of evolution comes this from Scientific American:
Link is at sciam dot com, /article.cfm?chanID=sa004&articleID=9952573C-E7F2-99DF-32F2928046329479
Primordial Soup's On: Scientists Repeat Evolution's Most Famous Experiment
Their results could change the way we imagine life arose on early Earth
Quote:
Link is at sciam dot com, /article.cfm?chanID=sa004&articleID=9952573C-E7F2-99DF-32F2928046329479
Primordial Soup's On: Scientists Repeat Evolution's Most Famous Experiment
Their results could change the way we imagine life arose on early Earth
Quote:
Another one on the evolution side of the board, and a strike for creationism/ID.When Miller repeated the experiment using the correct combo in 1983, the brown broth failed to materialize. Instead, the mix created a colorless brew, containing few amino acids. It seemed to refute a long-cherished icon of evolution—and creationists quickly seized on it as supposed evidence of evolution's wobbly foundations.
But Bada's repeat of the experiment—armed with a new insight—seems likely to turn the tables once again.
Bada discovered that the reactions were producing chemicals called nitrites, which destroy amino acids as quickly as they form. They were also turning the water acidic—which prevents amino acids from forming. Yet primitive Earth would have contained iron and carbonate minerals that neutralized nitrites and acids. So Bada added chemicals to the experiment to duplicate these functions. When he reran it, he still got the same watery liquid as Miller did in 1983, but this time it was chock-full of amino acids. Bada presented his results this week at the American Chemical Society annual meeting in Chicago.