Ellipsoidal universe can solve the cosmic microwave background quadrupole problem.

@article{Campanelli2006EllipsoidalUC,
  title={Ellipsoidal universe can solve the cosmic microwave background quadrupole problem.},
  author={Leonardo Contri Campanelli and Paolo Cea and Luigi Tedesco},
  journal={Physical review letters},
  year={2006},
  volume={97 13},
  pages={
          131302
        }
}
The recent 3 yr Wilkinson Microwave Anisotropy Probe data have confirmed the anomaly concerning the low quadrupole amplitude compared to the best-fit Lambda-cold dark matter prediction. We show that by allowing the large-scale spatial geometry of our universe to be plane symmetric with eccentricity at decoupling or order 10(-2), the quadrupole amplitude can be drastically reduced without affecting higher multipoles of the angular power spectrum of the temperature anisotropy. 

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