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Revisiting 1950s experiments for signs of life's origin

Date- 16th May 11 Source- 'In the 1950s, biochemist Stanley Miller performed a series of experiments to demonstrate that organic compounds could be created under conditions mimicking the primordial Earth. Some unused samples from Miller's research were recently uncovered by a team of scientists, including Jim Cleaves, of Carnegie's Geophysical Laboratory. Their findings, carried out using modern techniques and published online today by Proceedings of the National Academy of Sciences, indicate the possible importance of volcanoes and sulfur in the formation of amino acids, and possibly life, on earth. Miller's experiments were the first to demonstrate that subjecting hydrogen-rich gases to an electric spark could create the basic molecules of life. The set of samples used in this research was created in 1958. In the years since Miller's initial experiments, scientists have come to believe that the atmosphere of primitive Earth wasn't made up of the same gasses that he used in his initial study. But volcanic eruptions were likely very common during the early history of the planet and these volcanoes could have emitted clouds rich in hydrogen, methane and H2S, which would create conditions similar to Miller's experiments in limited geographic areas. The spark could have been supplied by lightning, which is commonly associated with volcanic clouds.' More info-'s_origin
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