  A novel generalisation of the Dirac-Born-Infeld string scenario is described.
It is shown that matter residing on the moving brane is dark and has the
so-called disformal coupling to gravity. This gives rise to cosmologies where
dark matter stems from the oscillations of the open strings along the brane and
the transverse oscillations result in dark energy. Furthermore, due to a new
screening mechanism that conceals the fifth force from local experiments, one
may even entertain the possibility that the visible sector is also moving along
the extra dimensions.
