Meet Zhong Zhong and Hua Hua, two cloned macaque monkeys. Chinese scientists first unveiled these monkeys several weeks ago, marking the first time primates have been successfully cloned with the same method that created Dolly the sheep in 1996. Just as it did then, the science research community instantly raised ethical questions and concerns about human cloning. Theoretically, human cloning could be achieved in two ways. Reproductive human cloning would entail creating a living human, identical to another person previously or currently alive.