Up to this point, they say, humans have largely worked to control and shape their exterior environments because they were powerless to do more.But transhumanists predict that a convergence of new technologies will soon allow people to control and fundamentally change their bodies and minds.Instead of leaving a person’s physical well-being to the vagaries of nature, supporters of these technologies contend, science will allow us to take control of our species’ development, making ourselves and future generations stronger, smarter, healthier and happier.The science that underpins transhumanist hopes is impressive, but there is no guarantee that researchers will create the means to make super-smart or super-strong people.Questions remain about the feasibility of radically changing human physiology, in part because scientists do not yet completely understand our bodies and minds.For instance, researchers still do not fully comprehend how people age or fully understand the source of human consciousness.