Difference between revisions of "Miller-Urey experiment"
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The '''Miller-Urey experiment''' was the first attempt to reverse-engineer the conditions in [[earth]]'s [[atmosphere]] that produced [[abiogenesis]] – the production of life from non-life. By recent analysis, the experiment did produce as rich a mixture of [[amino acid]]s as life would require. But it produced those acids in a racemic mixture, and even secular scientists are not willing to accept this as the definitive proof of how life began. | The '''Miller-Urey experiment''' was the first attempt to reverse-engineer the conditions in [[earth]]'s [[atmosphere]] that produced [[abiogenesis]] – the production of life from non-life. By recent analysis, the experiment did produce as rich a mixture of [[amino acid]]s as life would require. But it produced those acids in a racemic mixture, and even secular scientists are not willing to accept this as the definitive proof of how life began. | ||
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| + | ==The 1953 experiment== | ||
| + | [[File:MillerUreyExperiment.PNG|300px|thumb|left|The setup of the Miller-Urey Experiment of 1953. It attempted to simulate primitive Earth gases (Methane, Ammonia, Hydrogen, Water Vapor), primitive oceans (Water), and lightning.]] | ||
| + | In 1953, Stanley Miller reported the production of biomolecules from simple gaseous starting materials using an apparatus constructed to simulate the primordial Earth's atmosphere-ocean system. Miller used what he thought was primitive gases that would be available on a primitive earth: 200 ml of H2O, 100 mmHg of H2, 200 mmHg of CH4, and 200 mmHg of NH3 into the equipment. In other words the ratio was 2:1:2:2 for H2O, H2, CH4, and NH3. Then he subjected this mixture, under reflux, to an electric discharge simulating lightning for a week while the water was simultaneously heated for that time period.<ref name="exp setup">Parker, E. T., Cleaves, J. H., Burton, A. S., Glavin, D. P., Dworkin, J. P., Zhou, M., Bada, J. L., Fernández, F. M. [https://pmc.ncbi.nlm.nih.gov/articles/PMC4089479/ Conducting Miller-Urey Experiments]. J. Vis. Exp. (83), e51039, doi:10.3791/51039 (2014).</ref> | ||
[[Category:Biology]] [[Category:Evolution]] | [[Category:Biology]] [[Category:Evolution]] | ||
Revision as of 17:48, August 29, 2025
The Miller-Urey experiment was the first attempt to reverse-engineer the conditions in earth's atmosphere that produced abiogenesis – the production of life from non-life. By recent analysis, the experiment did produce as rich a mixture of amino acids as life would require. But it produced those acids in a racemic mixture, and even secular scientists are not willing to accept this as the definitive proof of how life began.
The 1953 experiment
In 1953, Stanley Miller reported the production of biomolecules from simple gaseous starting materials using an apparatus constructed to simulate the primordial Earth's atmosphere-ocean system. Miller used what he thought was primitive gases that would be available on a primitive earth: 200 ml of H2O, 100 mmHg of H2, 200 mmHg of CH4, and 200 mmHg of NH3 into the equipment. In other words the ratio was 2:1:2:2 for H2O, H2, CH4, and NH3. Then he subjected this mixture, under reflux, to an electric discharge simulating lightning for a week while the water was simultaneously heated for that time period.[1]
- ↑ Parker, E. T., Cleaves, J. H., Burton, A. S., Glavin, D. P., Dworkin, J. P., Zhou, M., Bada, J. L., Fernández, F. M. Conducting Miller-Urey Experiments. J. Vis. Exp. (83), e51039, doi:10.3791/51039 (2014).