An article in a pro-Creationism website states:
- In 1952 Harold Urey noted that most of the planets in our solar system, except earth, have an atmosphere which contains little or no free oxygen. Furthermore, Urey knew that the building blocks of life are quickly destroyed (oxidized) if they are exposed to an environment containing oxygen. Therefore, he concluded that spontaneous generation must have occurred on the early earth with an atmosphere consisting mainly of hydrogen, ammonia, methane and water vapor, but little or no molecular oxygen. Lightning, volcanic eruptions, sunlight, and deep oceanic volcanic vents are among the energy sources proposed to stimulate the necessary chemical reactions. It was presumed that the building blocks of life were made in the atmosphere and then gradually fell to earth eventually accumulating in the primeval ocean.
- Despite absolutely no geological evidence for the existence of this "primeval soup" the Oparin-Haldane-Urey theories became scientific dogma. These foundational assumptions have provided the framework for the modern theory of evolution for the last forty years.