Nature vs. nurture in the evolution of galaxies is not completely understood. Where a galaxy is found, its environment, can play an important role in determining the properties of that galaxy. This may not always be true, however.
As galaxies evolve they eventually stop forming stars. There are a host of (sometimes violent) processes that can end star formation in galaxies. The authors examine how galaxy mass plays a role in stopping star formation for nearby galaxies.
How small and faint can galaxies get? The authors of this paper report on the discovery of a dwarf galaxy in the Sculptor group.
Once thought to be the main mechanism by which galaxies feed their star formation; the authors of this paper find that minor mergers cannot account for the observed star formation rates of galaxies.
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A phenomenological series of simulations of dwarf galaxies placed on different orbits around a Milky Way-like galaxy, in order to learn about the properties (and observability) of tidal tails in dwarf galaxies around our Milky Way.