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However, our entire universe is a great source of these microwaves and it was not until the production of a small radio horn for satellite communication, created in 1965 at Bell Laboratories in Holmdel, New Jersey that this radiation was detected.
The discovery of cosmic microwave background radiation was significant because it fit in with George Gamow's second paper’s theory that the elements of the universe had been created 5 minutes after the 'Big Bang' and thus primordial radiation should be scattered across the universe. He also hypothesized that, due to expansion, the temperature of radiation should have cooled to about 5 degrees above 0, very close to the discovered temperature. When scientists detected this radiation it became evident that it contained a high degree of uniformity that proves its origins are from the farthest points of the universe (Silk, Big Bang 1980 102).
Cosmic microwave background radiation has also been found to have almost a perfect blackbody radiation, meaning that the intensity distribution of its radiation is that of a blackbody. Its temperature now is about 3 degrees Kelvin, inferring that it is very cold. This fits in very well with the notion that the universe has been expanding. Indeed, if the blackbody radiation is traced backward in time, it becomes hotter and hotter until it reaches the conditions to create blackbody radiation; a state of perfect equilibrium between radiation and matter. Evidence is also provided from small deviations from the blackbody spectrum of about 5 degrees (Monsters 4). This evidence provides important information on the small imperfections of the Big Bang, which are responsible for the structure of the universe. This discovery of cosmic microwave background radiation is probably the most significant evidence that supports the Big Bang theory.
As with many other scientific hypotheses, the Big Bang theory is not completely infallible. Although much current evidence supports the Big Bang theory of the creation of the universe, there is still some level of uncertainty surrounding it. In fact, there are a couple fundamental problems associated with the Big bang.
An interesting question that comes to mind when dealing with the Big Bang theory is; if the Big Bang created the universe as we know it, then what, if anything, existed before it? A modern speculation for many contemporary scientists and physicists is that the present expansion may be one cycle of many that this closed universe has undergone. But in reality, it is impossible to know what could have existed or occurred before the Big Bang scientifically. We can only speculate philosophically about what could possibly have been before the initial moment of creation. It is remarkable that although modern science can determine what occurred even one minute after the big bang, it is impossible to determine what existed or occurred before. We face the prospect of never knowing the answer to this and other related questions regarding the creation of the universe.

One can see that the Big Bang theory of creation is by no means an airtight, completely secure theory. Questions such as what existed prior to the Big Bang can be hypothesized about but never completely explained. Problems with this widely accepted theory do exist, but the dearth of evidence indicates that the Big Bang theory is more accurate than not.
Although the Big Bang theory does not yet explain everything about the evolution of the universe, it does indeed explain an ample amount. With the advances in modern technology, much convincing evidence has been discovered adding further credibility to this framework of the universe. The Big Bang theory makes evolution and changes the central concept of its cosmology. As astronomers and physicists gain more information from more technical instruments such as the Hubble Space Craft, they will undoubtedly discover more elements of the universe that will contribute to our understanding of its evolution. "Smaller" questions such as the universe’s status before creation, and the possibilities of universal contraction still puzzle scientists. However, it seems amazing that we can come up with a Big Bang theory that seems so accurately to predict the very creation of the mind twistingly complicated universe.