This proposal is part of an in-depth work carried out by the Claude Bernard University of Lyon 1, which is based on the strengths of the institution, the practices of its researchers, its actions and mediation mechanisms, as well as its research on the issues of dialogue between the scientific and social spheres, in order to envisage an interdisciplinary department. This department, which is part of the institution's strategic plan and is to be set up in 2025, will work to enable and make visible the crucial question of the continuum of "creation, production, openness, dissemination, circulation, sharing and appropriation" of knowledge, from the scientific to the social sphere. The project therefore aims to equip and consolidate this prefiguration work, which places ethics at the centre of its dynamics, to better support researchers in their practices, to enable these practices to be recognised as research work, to better welcome the public, and thus to establish a clearer understanding of the links and articulations between "knowledge dissemination", "scientific mediation" and "open science". The aim of this project is therefore to develop the University's third mission at a time when it is contributing to the production of knowledge in research fields that directly address the major challenges facing our society (health, climate, digital transformation).