Supernovae, CMB, and Gravitational Leakage into Extra Dimensions
  We discuss observational constraints coming from CMB and type Ia supernovae, for the model of accelerated universe produced by gravitational leakage into extra dimensions. Our fits indicate that the model is currently in agreement with the data. We also give the equations governing the evolution of cosmological perturbations. Future observations will be able to severely constrain the model. 
C\'edric Deffayet, Susana J. Landau, Julien Raux, Matias Zaldarriaga,   Pierre Astier