In referring to evolution, the word means various changes. Evolution refers to the fabrication and development of life on earth. "Organic evolution" is the concept that all living beings evolved from simple organisms and have changed throughout the periods of time to create many and various types of species. Organic evolution is better known as the "theory of evolution." There are three main theories of evolution, which are, the early theories proposed by Comte de Buffon, Baron Cuvier, and Lamarck, the synthetic theory, and the Darwin theory.

In the 1700s, French naturalists, Comte de Buffon and Baron Cuvier concluded with the studies of fossils and comparative anatomy that life on earth had endured many changes through a long period of time. In the early 1800s, another French naturalist named Lamark, proposed the first complete theory of evolution. He observed through is observations,

propose his theory of evolution. On the coast of South America, Darwin came under the possession of many specimens of plants and animals. On the Galapagos Islands, off the coast of Ecuador Darwin discovered many differences between species on the islands and with the species on the mainland. For example, Darwin noted that certain fossils of extinct species were closely similar to living species in the same geographical area. Darwin also observed that each island possessed its own form of tortoise, mockingbird, and finch. He also discovered various forms of these species were closely similar but differed in structure and eating habits from island to island. In addition, Darwin discovered varieties of differences between species on one island and another island. With each observation, Darwin come to the question of possible links between distinct but similar species.

Natural selection consists of three types of selections. One, directional selection. Two, stabilizing selection. Finally, sexual selection. Direction selection creates new features that aid a species to adapt to its environment. Directional selection produces a never ending change in the species toward the more complex characteristic. Under the circumstance that a species is already greatly adapted to its environment, stabilizing selection initiates. With stabilizing selection, individuals with average characteristics produce the most offspring. On the contrary, individuals that differ the most from the average tend to produce the least offspring. For example, stabilizing selection of human beings is the survival rate of human babies according to their birth weight. On average, when an infants weight is average, the baby tens to survive better that those who are either heavier or lighter than the average weight. On the opposite side of directional selection, stabilizing select!

On the contrary, many anthropologists disagreed with Darwin's opinion because the Dark Continent, better known as Africa, was not a fit enough place for the origin of a so noble of a creature as the Homo sapiens. Another conclusion made by Darwin was this:

In 1808, French naturalist Chevalier de Lamarck contemplated a theory of evolution, although, his theory of evolution did not gain any recognition until 1858. In 1858, British naturalist Charles R. Darwin furnished his theory of evolution, also known as Darwin's theory. Along with Darwin's theory of evolution there early theories and the synthetic theory. In 1858, Charles Darwin furnished his theory of evolution and the majority of scientists accept the Darwin theory today. The Darwin theory states that all species evolved from either many or few common ancestors or descendants under circumstances of natural selection. Three chief resources aided Darwin to develop his widespread theory of evolution. One, his personal observations, two, the geological theory of British scientist Sir Charles Lyell, and three, the population theory of the British economist Thomas Robert Malthus. Aboard the H.M.S Beagle from 1831 to 1836, Charles Darwin made many of is observations in his quest to!

" If it be an advantage to man to have his hands and arms free and to stand firmly on his feet,...then I can see no reason why it should not have been more advantageous tot he progenitors of man to have become more and more erect or bipedal. The hands and arms could hardly have become perfect enough to have manufactured weapons, or to have hurled stones and spears with true aim, as long as they were habitually used for supporting the whole weight of the body...or so long as they were especially fitted for climbing trees."

tributed throughout Europe, India, China and Africa. On the contrary, the skeleton of Dryopithecus is still frustratingly incomplete. The skeleton has been reconstructed by used the jaw and tooth bone fragments. Standing at bout four feet tall and weighing about eighty pounds, Oreopitecus is a possible branch of the human's family tree. W

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