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The Theory theory of Evolution evolution is a scientific theory which seeks to explain the existence of the myriad species which are found on the Earth today without resort to supernatural explanations (such as the intervention of a God or gods). The theory stands in contrast to theories of [[Creationism|creation]] which propose that the all life was created through the direct actions of a God or gods as per, for example, the account told in the [[Bible|Bible's]] book of Genesis. Accordingly, the theory of evolution is often strongly opposed by those who believe that all animals in creation. Evolution stipulates life evolved (including manchanged) were designed and created by such over the course of many millions of years from a supernatural beingsingle-celled organism, while Creation holds that life appeared very recently, and without change.

The theory of evolution is essentially based on two observations: (1) that all living things are involved in a struggle for survival; and (2) that all living things can pass on their characteristics to their offspring. It relies upon the combined operation of two processes generally referred to as natural selection and genetic mutation.

Genetic mutation is a process which allows for a physical difference to exist between an individual individuals and its their offspring. Differences which arise as a result of genetic mutation are chance events and most such differences are generally unlikely to be advantageous to the offspring.

The Theory of Evolution proposes that over a very long period of time the differences brought about by mutations which are found to be advantageous (through the process of natural selection) will result in changes within species and the development of new species.