The Evolutionary Map of the Universe (EMU, e.g., Norris et al. 2011) is a radio continuum survey performed with the Australian Square Kilometer Array Pathfinder. Because of its very high sensitivity (40 times NVSS) it will discover star forming galaxies up to redshift 1. Moreover, EMU will detect radio halos, radio relics, tailed radio galaxies, etc. in thousands of galaxy clusters.