The Origin of the Universe Research Paper Example | Topics and Well Written Essays - 1750 words

The Origin of the Universe - Research Paper Example Not only is it difficult to figure out how a whole universe could appear from nothing, but also no plausible explanation for the mechanism of the explosion itself springs to mind. The only known force in nature capable of affecting the universe as a whole is gravity. Gravity is, however, an attractive force, whereas the explosion requires a repulsive force. The mystery of the explosion lies in the first fraction of a second of the life of the universe. At such early times, the universe was in a state of incredibly high temperature and density, a situation so foreign to laboratory conditions that it is impossible to extrapolate known physics to that realm. The cause of the explosion is shrouded in the extreme conditions of the very early universe. For a while cosmology treated the existence of the universe as a given and concentrated on the consequences of the explosion rather than its cause. In the course of the scientific step-by-step reconstruction of the chronology of the universe , a number of puzzling paradoxes surfaced, of which two are of interest here. The first deals with the strength of the explosion. The push of the Bang was exquisitely well fine-tuned, allowing for the existence of a universe with galaxies, stars, planets, and life. Any other push would have meant either a structureless universe or a universe collapsing back onto itself after a brief existence. Why was the Bang so well engineered? The second paradox deals with the large-scale properties of the universe. The extreme large-scale smoothness of the temperature and of the density of matter cannot be explained by the standard Big Bang model. No known physical process can account for it. What is the origin of this conspiracy? Is our universe very peculiar, that is, did it just start this way by sheer luck -- in the scientific jargon, with very special initial conditions -- or are there mechanisms that can account for the fine-tuned push of the explosion and for the smoothness of the univers e? Two diametrically opposite schools of thought have addressed these paradoxes. The proponents of the so-called anthropic principle state that if the universe were not so fine-tuned, there could be no life in it, and we humans would not be there to witness it. Although this statement is correct, it does not attempt to resolve the paradoxes in terms of physical mechanisms, but relegates them to the status of special initial conditions. In other words, that is the way the universe started because if it had not, we would not be there to witness it. The other school of thought has refused to accept special initial conditions but rather has searched for mechanisms that could account for the observed peculiarities. It is the purpose of this essay to present and to discuss some of the latest models advanced by the second school. The Big Bang When Einstein applied his newly created theory of General Relativity to the universe, he discovered to his dismay that the universe was not static as everybody, including himself, liked to believe at that time. His universe was either contracting or expanding. Rather than exploring the consequences of his findings, Einstein introduced an ad-hoc term into his equation that he called the cosmological term. The cosmological ter

19th Century Americas Affect on Native Americans Essay

19th Century Americas Affect on Native Americans - Essay Example The push was on to the west. The face of Native America would soon be changed forever.Concern over the possibility of European expansion propelled the United States Government to create a buffer to stem a possible encroachment. "Between 1816 and 1840, tribes located between the original states and the Mississippi River, including Cherokees, Chickasaws, Choctaws, Creeks, and Seminoles, signed more than 40 treaties ceding their lands to the U.S." (National Historical Trail, n.p.) The Federal Removal Act signed into law did not call for the actual removal of Indians from their homeland; it gave the authority to negotiate for exchange of their land for land in the western territories. However, pressure to obtain native land soon resulted in the forcible removal of Native Americans from the eastern United States. Probably the most well known forced move became known as the 'Trail of Tears' where thousands died on the forced marches.There was no consideration given for the vast cultural di fferences of various tribes. Uprooted from their way of life and relocated to areas home to other tribes resulted in cultural upheavals and clashes amongst various Native American tribes. Additionally, settlers began pushing westward. As the demand for more land by settlers west of the Mississippi River increased, hostility grew between the settlers and the American Indians.