  The Australian SKA Pathfinder (ASKAP) is a new radio-telescope being built in
Western Australia. One of the key surveys for which it is being built is EMU
(Evolutionary Map of the Universe), which will make a deep (~10 {\mu}Jy/bm rms)
radio continuum survey covering the entire sky as far North as +30\circ. EMU
may be compared to the NRAO VLA Sky Survey (NVSS), except that it will have
about 45 times the sensitivity, and five times the resolution. EMU will also
have much better sensitivity to diffuse emission than previous large surveys,
and is expected to produce a large catalogue of relics, tailed galaxies, and
haloes, and will increase the number of known clusters by a significant factor.
Here we describe the EMU project and its impact on the astrophysics of
clusters.
