Transhumanism is a discipline that is concerned with the social and scientific implications of overcoming human limitations. It is now possible, with the use of technological and bio-medical innovations, to live longer, be stronger and transcend the limitations that human beings have faced since the beginning of existence. But what are the moral and ethical implications? From steroids to designer babies to artificial wombs, our leading thinkers discuss the ethical and moral implications of bio-technology and nanotechnology.