A British scientist, J.B.S. Haldane, suggested that life originated from simple inorganic molecules. Two scientists, Stanley Miller and Harold Urey were the first to put to test, the Oparin - Haldane theory, in the year 1953. They created a condition similar to that of primitive earth (i.e. high temperature, volcanic storms, reducing atmosphere) containing ammonia (NH3), water vapour (H2O), hydrogen (H2), methane (CH4). They made electric discharge in a closed flask containing CH4,NH3,H2 and water vapour at 800∘C. As a result, some amino acids are formed.