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March 7, 1930 - May 20, 2007 Stanley Lloyd Miller

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http://en.wikipedia.org/wiki/Stanley_Miller. March 7, 1930 - May 20, 2007 Stanley Lloyd Miller Miller and Urey experiment (or Urey–Miller experiment ) Simulated hypothetical conditions thought at the time to be present on the early Earth

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http://en.wikipedia.org/wiki/Stanley_Miller

  • March 7, 1930 - May 20, 2007Stanley Lloyd Miller
  • Miller and Urey experiment (or Urey–Miller experiment)
  • Simulated hypothetical conditions thought at the time to be present on the early Earth
  • tested Alexander Oparin\'s and J. B. S. Haldane\'s hypothesis that conditions on the primitive Earth favored chemical reactions that synthesized organic compounds from inorganic precursors
  • Classic experiment on the origin of life (published in 1953) by Stanley Miller and Harold Urey at the University of Chicago
  • Passed electrical discharges (simulating thunderstorms) through mixtures of hydrogen, ammonia, methane, and water, believed to have formed the earliest atmosphere.
  • Analysis showed that organic molecules including glycine and alanine (simple amino acids), urea, aldehydes, and carboxylic acids were produced
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After Miller\'s death in 2007, scientists examined the sealed vials preserved from the original experiments & showed there were over 20 different amino acids produced in Miller\'s original experiments (more than what Miller originally reported, and more than the 20 that naturally occur in life.

  • Moreover, some evidence suggests that Earth\'s original atmosphere might have had a different composition than the gas used in the Miller–Urey experiment. There is abundant evidence of major volcanic eruptions 4 billion years ago, which would have released carbon dioxide, nitrogen, hydrogen sulfide (H2S), and sulfur dioxide (SO2) into the atmosphere.
  • Experiments using these gases in addition
  • to the ones in the original Miller–Urey experiment have produced more diverse molecules.

http://en.wikipedia.org/wiki/Miller%E2%80%93Urey_experiment

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