  We argue that the observed large-scale cosmic microwave anomalies, discovered
by WMAP and confirmed by the Planck satellite, are most naturally explained in
the context of a marginally-open universe. Particular focus is placed on the
dipole power asymmetry, via an open universe implementation of the large-scale
gradient mechanism of Erickcek et al. Open inflation models, which are
motivated by the string landscape and which can excite `super-curvature'
perturbation modes, can explain the presence of a very-large-scale perturbation
that leads to a dipole modulation of the power spectrum measured by a typical
observer. We provide a specific implementation of the scenario which appears
compatible with all existing constraints.
