|Title||Gas around Galaxies|
Gas accretion and galactic winds are two of the most important and most poorly understood aspects of the formation and evolution of galaxies. It is therefore crucial to compare model predictions not only with observations of galaxies, but also with observations of the gas around them. I will use both simulations and observations to shed light on the interactions between galaxies and their environments. Finally, I will demonstrate that gas flows have important implications for observational cosmology.