  In the present work we discuss inflation, dark matter and cosmological
evolution in the context of the brane-world scenario. Being string theory
inspired, the brane-world models provide corrections to the General Relativity,
which is considered to be the low-energy limit of string theory. We find that
novel cosmologies are obtained, which potentially can provide answers to some
of the longstanding problems of modern cosmology, such as the origin and nature
of dark energy. At the same time the successes of the standard four-dimensional
cosmology are preserved, and in some cases the treatment in the framework of
brane cosmology is even more satisfactory.
