This article will briefly present a few theses and reflections of mine on some perversions and disruptions under way in knowledge development and in science representation. Nevertheless, I will abstain from exposing thoroughly the obvious and triumphal side of the coin. Namely, I am not going to extol the amazing fortune of science and knowledge, which have become the fundamental resource for development, at economic level in first place. Indeed, having reached a certain age, I can allow myself  although to a certain degree of oversimplification less enthusiasm and a few old-fashioned ideas.
We have analyzed the popularization activities undertaken by ten thousand CNRS researchers by means of their annual reports for the years 2004, 2005 and 2006. This is the first time that such an extensive statistical study on science popularization practices is carried out. Our main findings are : - the majority of researchers is not involved in popularization (51% has not done any popularization over the three-year period, two thirds have been involved in no more than one popularization action). - popularization practices are extremely diverse, both at the individual level (we have identified