Introduction Evolution still remains one of the most controversial fields of scientific research. A section of the society considers evolution a controversial issue that was going against some of the strong beliefs that the society held about creation. The biblical account holds that Adam was created in the current nature of men by God who placed him in the Garden of Eden. Even some of the renowned scientists such as Carolus Linnaeus, who developed the classification of animals in 1735, held that species were fixed based on the divine plan. However, there was a shift in the scientific view of creation when, in 1890s, a group of scientists developed the theory of evolution. Lamarck and Charles Darwin are some of the early scientists who played a big role in explaining the possibility that all living things could have evolved from simple organisms. In fact, Charles Darwin went further to specify some of the factors that supported his Evolution Theory. Since his time, natural scientists have engaged in several researches in order to determine the truth behind this theory. Some extinct creatures such as dinosaurs were found to have existed several millions of years ago. While science has been consistent in explaining that evolution is the only way through which, history of mankind can be explained, religious groups and a section of the society still believe that evolution is the creation of scientists who are keen to discredit the work of God. This research paper seeks to determine why evolution is true. Discussion Fossil Evidence The Theory of Evolution has strongly been supported by fossil evidences that have indicated a consistent pattern of some specific species to change in shape, size, and intellectual capacity. According to Bowler (26), Darwin supported his Theory of Evolution using a critical study of the fossil evidence. A study of some of the fossil evidence using some of the modern tools shows a clear pattern of evolutionary change that make it easy to appreciate that evolution could be true. Although fossils are rare to find, scientists have worked hard to trace them in order to determine the path that the current creatures took to evolve into modern-day creatures. One of the most studied fossils is that of a human being. Scientists have been keen to identify some of the prehistoric sites in Africa and Europe to explain the origin of man. There has been a need to compare some of the existing creatures to their pre-historic ancestors. Using some of the modern dating methods such as carbon-14, scientists have tried to determine man’s ancestors based on the age of the fossils. Their studies reveal that there is a close relationship between one species and its immediate ancestors. The Homo sapiens, or the modern man, was found to have some resemblance with its immediate ancestor, the Homo erectus. However, there are some fundamental differences between the two species. According to Fleisher (41), the Homo erectus lacked the ability to think like the Homo sapiens. Although he was an upright man, just as the Homo sapiens, its brain capacity was much smaller than that of Homo erectus. The fossil evidence supports the Theory of Evolution because when these ancestors are studied c