PhD in astrophysics and philosophy, Aurélien Barrau is an astrophysicist specialising in astroparticle physics, black holes and cosmology. He works at the CNRS laboratory of subatomic physics and cosmology (LPSC) in Grenoble. He is a professor at the Université Grenoble Alpes. As an ecological activist, his researches highlight the link between man and animal.