abstract: We show that the bifurcation loci of holomorphic families of rational maps (and more generally of endomorphisms of Pk in any dimension) can be seen as the projection of a suitably defined Julia set for a self-map of a higher-dimensional space. A similar statement holds for the bifurcation currents, and permits the study of the bifurcation loci and currents using dynamical tools typical of phase spaces. This is a joint work with F. Berteloot and T.-C. Dinh.