I am a researcher in cosmology, the area of physics devoted to the understanding of our universe's global properties and evolution. This vast field lays at the interface between theoretical physics, particle physics and astrophysics. My original background is rather in theoretical physics, but as time passed by, I got closer and closer to astrophysics, with a particular interest for the theoretical interpretation of astrophysical observations relevant for cosmology and particle physics. I am a member of the Planck satellite collaboration and of the Euclid satellite collaboration.