Production of amino acids under possible primitive earth conditions.

The Miller–Urey experiment or Miller experiment, a classic experiment investigating abiogenesis, simulated the conditions thought at the time to be present on the early Earth, and tested the chemical origin of life under those conditions. The experiment confirmed Alexander Oparin's and J. B. S. Haldane's hypothesis that putative conditions on the primitive Earth favored chemical reactions that synthesized more complex organic compounds from simpler inorganic precursors.