  This paper reviews the dust content of the high redshift (z > 2) universe.
Studies of the various "species" in the high-z "zoo" show that almost all have
strong evidence for containing dust. The one exception, where the evidence is
not yet convincing, is in quasar absorption line systems, particularly those
with low column density. These may not even be associated with galaxies. The
high-z galaxy types which do show evidence for dust are all strongly star
forming. Hence, as seen locally, star formation and dust in the distant
universe are also strongly correlated. It is beyond debate that star formation
at z ~ 3 is dominated by dusty systems who emit most of their bolometric flux
in the rest-frame FIR. What is not clear is whether these systems are totally
invisible at shorter wavelengths, or whether a large fraction are visible in
the rest-frame UV as Lyman Break Galaxies. The issue may not be settled until
the sub-mm background is definitively resolved.
