  The Cosmic Microwave Background (CMB) power spectrum derived from the first
year WMAP data demonstrates an intriguing lack of power at large scales that
cannot be accounted for within the framework of the standard cosmological
model. We explore the possibility that this anomaly could be explained by
waiving the implicit assumption of a simply connected topology, rather than
modifying the physics of the standard model. In particular, we assume that the
Universe is slightly closed and its spatial section can be described by one of
the simplest spherical multi-connected manifolds (the quaternionic, the
octahedral, the truncated cube and the Poincare space). We discuss the
implications for the CMB in each case.
