Mention the contribution of S.L. Miller's experiments on Origin of Life.

Explanation

S.L. Miller created an environment in a laboratory similar to the one that existed before life originated. In a closed flask containing `CH_(4),H_(2),NH_(3)` and water vapour at `800^(@)`C, electric discharge was created. ,
The conditions were similar to those in primitive atmosphere. After a week, he observed presence of amino acids and complex molecules like sugars, nitrogen bases, pigments and fats in the flask. This provide experimental evidence for the theory of chemical origin.