My research concentrates on "Stellar Ecology": the interplay between stars and their environment. Stars form from dense clouds of gas and dust, most of which was previously burnt inside stars and ejected by them as they died. This mass-loss process can happen in different ways, via winds or explosions. Much of my research is aimed at understanding how these mechanisms work, and how they would operate under conditions that were prevalent in the early Universe but which we can no longer observe locally. In order to better understand the impact of the ejecta on the future of their host galaxies, I investigate the small-scale structure of the diffuse interstellar medium.