With the growth of technological progress, scientists begin to speculate on the realistic realization of human cloning, while this is happening, opposing groups and organizations raise their voices against it and create the question whether scientists cloning humans should be allowed, the promise of cloning at any level can revolutionize the world and change it for the better, but we are not ready for human experimentation. If successful, cloning can bring many positive technological advances that would help humanity. Dolly, the first cloned mammal, inspired many scientists to envision a new era in cloning technology and raise hopes for the future likelihood of human cloning being possible. At the center of the controversy is what comes closest to a clone living a healthy and regular life, identical twins. The promise of cloning at any level can revolutionize the world and change it for the better, but are we really ready for human experimentation? Human cloning is the process of producing a duplicate of a human being. It is the exact genetic copy and every single fragment of their DNA is identical. If successful, cloning can bring many positive technological advances that would help humanity. Possible benefits would be; replace deceased loved ones, reproduce human beings with special abilities and great intelligence such as Einstein and regenerative medicine. Regenerative medicine is the process of using cloned organs to replace damaged human organs. As splendid as it may seem, no clone, human or animal, has accepted the challenge without any complications. Being a fairy tale, cloning seems too good to be true and the failure rate is enormous. “Your success can't be 1 or 2%. A 2% success rate is not… halfway through the article… not only is it unfair, but it is also counterproductive to the development of individualization of each twin. In conclusion, the thesis of this article is supported by three challenges. First, if successful, cloning can bring many positive technological advances that would help humanity. Second, Dolly, the first cloned mammal, inspired many scientists to hypothesize a new era in cloning technology and raise hopes for the future probability in which human cloning would be possible. Finally, at the center of the controversy, arises what comes closest to a clone living a healthy and regular life, identical twins. The promise of cloning at any level can revolutionize the world and change it for the better, but we are not ready for human experimentation. The failure rate is overwhelming; we should master animal cloning with a success rate close to 100% before starting human cloning trials.