Nanotechnology is penetrating many areas of our daily lives at incredible speed, opening up new horizons of expectation and hope. At the same time, it is raising questions which affect our individual self-conception and that of our society. Will nanotechnology change our future: coexistence, the work and consumer environment, social security systems? And to what extent are we prepared to accept such change?Ethical questions are at the centre of four topic modules* Naturalness - How is nanotechnology changing human existence?* Reality and vision - nano between fact and fiction?* Integrity issues - high tech for everybody?* Regulatory requirements - At what point should the state become involved in technological development?(source: www.sizematters2009.de)