I work on the interface between fundamental theories and the observations. I ask questions, for example, about how symmetries underlying gravitational theories might leave signatures in cosmological and astrophysical phenomena. Or, I ask under what conditions can various coarse-graining techniques allow one to make and test predictions while remaining agnostic about microphysics. Finally, I ask about complexity in physical and biological systems, using tools from condensed matter and information theories. Sometimes, I answer these questions!