Important scientific, ethical and sociological debates are emerging over the trans-humanist goal to achieve therapeutic treatments to ‘cure’ the debilitation of age-related illness and extend the healthy life span of individuals through interventive biogerontological research. The scientific and moral discourses surrounding this contentious scientific field are mapped out, followed by a normative argument favouring ‘strong’ deliberative democratic control of human life extension research. This proposal incorporates insights from constructive and participatory technology assessment, upstream public engagement and back-casting analysis; to outline (...) a programme of participatory approaches to encourage two-way dialogue between scientific and citizen perspectives, and foster the long-term deliberative democratic governance of this developing field. (shrink)