Cloning is an issue that has been evolving during time. At the begining, cloning was been researched and was described as something that was hard to reach. Even science fiction movies, such as Multiplicity, were produced about cloning. As the time went through, cloning became a reality. In 1996 "Dolly", the first mammal, a sheep was born. Dolly was created by Ian Wilmut, an embryologist of the Rosling insitute ( World Book, http://www.worldbook.com ). Since then, many mammals, such as mice and calves were created. Right now, there is a fear, ....