Inhomogeneous Cosmology, Inflation and Late-Time Accelerating Universe
  An exact inhomogeneous solution of Einstein's field equations is shown to be able to inflate in a non-uniform way in the early universe and explain anomalies in the WMAP power spectrum data. It is also possible for the model to explain the accelerated expansion of the universe by late-time inhomogeneous structure. 
J. W. Moffat