This week we're going back to a previous episode talking about the use - and appalling misuse - of genetics in pursuit of human perfection. We'll speak to Claudia Malacrida, sociology professor and eugenics researcher, about her book "A Special Hell: Institutional Life in Alberta's Eugenic Years." And we'll talk to Hannah Brown, postdoctoral researcher at the University of Adelaide, about the ethical issues raised by the creation of a genetically modified human embryo.