In this paper I will explore the ramification ofthe distinction between fact and values in order to show that human values enter in various ways in both science and technologies without violating Humes factlvalue distinction. Among the nanotechnologies, I will discuss the case study provided by the use of microchips implanted under our skin: though they do not obviously overcome the limits of the natura! laws , their application might in principie jeopardize our ethical principles in a way that is (...) more powerful than previously existing 'rnacrotechnology'. This greater power depends on the fact that the properties of the macroworld depend on the 'nanoworld', but not conversely. (shrink)