Dr. Miguel Zumalacárregui from UC Berkeley is visiting the IFT for the period March 13th to 31st, 2017. His office number is 114. Miguel's research focuses on how cosmological data can be used to test gravity and fundamental physics. He is developing methods to compute cosmological observables in a broad class of gravity theories (www.hiclass-code.net). He more recently became interested in gravitational waves and non-linear effects on the large scale structure of the Universe. He also works on formal aspects of classical theories of gravity, including finding general frameworks to construct new classes of viable models.