Volution = Evolucionla biological evolution is the set of transformations or changes over time which has given rise to the diversity of forms of life that exist on the Earth from an ancestor comun.1 2 the word evolution to describe such changes was applied for the first time in the 18th century by Swiss biologist Charles Bonnet in his work Considération sur les corps organises.3 however 4, the concept that life on Earth evolved from a common ancestor already had been formulated by various Greek philosophers, 5 and the hypothesis that the species are continuously transformed was postulated by scientists of the 18th and 19th centuries, which Charles Darwin quoted in the first chapter of his book the origin of the especies.6 HoweverIt was the own Darwin, in 1859,7 who synthesized a coherent body of observations which strengthened the concept of biological evolution in a true scientific theory.