  This is the obligatory Cosmic Microwave Background review. I discuss the
current status of CMB anisotropies, together with some points on the related
topic of the Far-Infrared Background. We have already learned a number of
important things from CMB anisotropies. Models which are in good shape have:
approximately flat geometry; cold dark-matter, plus something like a
cosmological constant; roughly scale invariant adiabatic fluctuations; and
close to Gaussian statistics. The constraints from the CMB are beginning to be
comparable to those from other cosmological measurements. With a wealth of new
data coming in, it is expected that CMB anisotropies will soon provide the most
stringent limits on fundamental cosmological parameters, as well as probing
high energy particle physics and the Dark Ages of astrophysics. Nudge, nudge.
Wink, wink. Say no more.
