A galaxy-sized wind is revealed billowing out from a giant star factory, in a dust-enshrouded nucleus, that was triggered as two galaxies merge.Credit:N. Ramírez-Olivencia et el. [radio]; NASA, ESA, the Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration and A. Evans (University of Virginia, Charlottesville/NRAO/Stony Brook University), edited by R. Cumming [optical]