Sahni, VarunShtanov, Yuri2012-03-052012-03-052008-11http://hdl.handle.net/11007/340Brane cosmology presents many interesting possibilities including: phantom acceleration (w < −1), self-acceleration, unification of dark energy with inflation, transient acceleration, loitering cosmology, new singularities at which the Hubble parameter remains finite, cosmicmimicry, etc. The existence of a time-like extra dimension can result in a singularity-free cyclic cosmologyenExtra DimensionsCosmic AccelerationArticle