Harold Urey was the teacher of the American researcher Stanley Miler at Chicago University. Because of Urey's contribution to Miller's 1953 experiment on the origin of life, this is also known as the Urey-Miller Experiment. This experiment is the only "proof" used to supposedly confirm the molecular evolution thesis, which is put forward as the first stage in the evolutionary process. However, the experiment was never able to offer any findings to support evolutionist claims regarding the origin of life. (See The Miller Experiment.