It’s now been over two decades since scientists in Scotland successfully cloned a sheep and named the newborn Dolly. In the years since, the technology that powers cloning has advanced slowly but steadily, and while many scientists fear the inevitability that one day a human clone will be created, others are pushing the field into new areas. The latest example of cloning’s ceaseless march forward is the birth of Hua Hua and Zhong Zhong, a pair of baby monkeys that are the byproduct of the first successful somatic cell nuclear transfer performed with primates.
