  The purpose of this paper is to seek a connection between noncommutative
geometry, an offshoot of string theory, and certain aspects of dark matter and
dark energy. The former case is based on a simple mathematical argument showing
that the main manifestation of dark matter in connection with flat rotation
curves in galaxies and clusters of galaxies is also a consequence of
noncommutative geometry. The latter case requires an examination of the local
effect of noncommutative geometry and the subsequent extension to the global
phenomenon of an accelerating Universe.
