Physics of Fluids in Microgravity provides a clear view of the latest research and progress in the different fields of fluid research in space at the beginning of the International Space Station Era. The topics presented include bubbles and drops dynamics, Marangoni flows, diffusion and thermodiffusion, solidification and crystal growth. The results obtained so far are, in some cases, to be confirmed by extensive research activities on the International Space Station, where basic and applied microgravity experimentation will take place in the years to come.