The formation of the Earth has been a mystery to many and boggling the minds of the erudite and the simple minded alike for years. The topic of creation vs. evolution has become increasingly controversial. In biology, Darwin’s Theory of Evolution is a change in the genetic material of a population of organisms from one generation to the next. Though changes produced in any one generation are normally small, differences accumulate with each generation and can, over time, become substantial changes in the population. Such similarities among species suggest that all known species are descended from a common ancestor (or ancestral gene pools process of gradual divergence). Evolution is supported in many different ways, but one major category pointing to its validity that I take away from this chapter is fossils. Through fossil dating, hominoid fossils, and, evolution has become the theory accepted by the majority of those in the scientific forefront. Evolution through fossil records is the best evidence of developing life on Earth. The study of the sequence of occurrence in rocks reveals the relative time in which organisms lived. This technique shows that one layer of rock is older or younger than another. Later through the discovery of radioactivity, scientists were given the opportunity to learn the age of fossils and rocks. Through these records, a vague timeline is illustrated of the evolutionary change that has been occurring over the past four billion years. This proves that the earth is much older than creationist would like to argue. A popular criticism of the fossil records is that the gaps in this timeline are enough to disprove the line all together, but the more that is learned about the evolution of specific species line’s, the more these gaps or missing links in the chain are filled with transitional fossil specimens. Fossils records are one factor that works to make evolution true beyond a reasonable doubt. Evolution is