The tidal tail of this spiral galaxy, photographed by the Hubble Space Telescope, is a clear sign of a gravitational interaction between galaxies. Recently, researchers have proposed tidal interactions as the possible cause of a dwarf galaxy that harbors an outsize black hole — one nearly as massive as the Milky Way's central black hole but in a galaxy more than 10,000 times less massive. To learn more about this hypothesis and whether it's feasible, you can read our AAS Nova highlight and the corresponding research article in the Astrophysical Journal Letters. [ESA/Hubble & NASA, Dark Energy Survey/DOE/FNAL/DECam/CTIO/NOIRLab/NSF/AURA, J. Dalcanton; CC BY 4.0]