Origin of carbon 14 dating
Origin of carbon 14 dating - the sweet sex and love 2003 free online
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.
The notion that life could arise from inanimate, non-living matter is not a recent idea.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.During the dark ages, people speculated that rats and flies arose spontaneously from garbage because they mysteriously appeared when garbage was left out.Others had noticed that when meat and broths were left exposed they became covered with maggots and microorganisms.Furthermore, the chemical building blocks of proteins, RNA and DNA, would be quickly annihilated because ultraviolet radiation destroys their chemical bonds.
It doesnt matter if these newly formed building blocks are in the atmosphere, on dry ground, or under water. The chemical building blocks of life would be destroyed if oxygen was present, and they would be destroyed if it wasnt!
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.
In the 1970s Apollo 16 astronauts discovered that water is broken down into oxygen and hydrogen gas in the upper atmosphere when it is bombarded by ultraviolet radiation.
This process, called photo dissociation, is an efficient process which would have resulted in the production of large quantities of oxygen in a relatively short time.
Ernst Haeckel, one of the chief proponents of Darwinism, stated in 1876: "If we do not accept the hypothesis of spontaneous generation, then at this one point in the history of evolution we must have recourse to the miracle of a supernatural creation." The spontaneous generation debate heated up again in 1924 when Russian biochemist, I. Oparin proposed that life had arisen from simpler molecules on the lifeless earth under much different atmospheric conditions than exist today. In the nineteenth century Ernst Haeckel argued that although spontaneous generation was not observable under the current conditions on earth, it did take place in the past under different chemical conditions.