Cloning—using biotechnology to create embryos with specific genetic information, identical to other embryos or even human adults—used to sound like science fiction. Today, however, the ability to successfully clone human embryos is a matter of when, not if. But should human cloning be allowed to go forward? Is cloning morally wrong, in and of itself? Should we make a distinction between cloning for medical research and cloning for procreation? If cloning is morally wrong, could we stop it even if we wanted to? And if cloning isn't or can't be banned, how should it be regulated?