  We present a brief review of brane-world models - models in which our
observable Universe with its standard matter fields is assumed as localized on
a domain wall (three-brane) in a higher dimensional surrounding (bulk)
spacetime. Models of this type arise naturally in M-theory and have been
intensively studied during the last years. We pay particular attention to the
covariant projection approach, the Cardassian scenario, to induced gravity
models, self-tuning models and the Ekpyrotic scenario. A brief discussion is
given of their basic properties and their connection with conventional FRW
cosmology.
