  We propose that our world is a brane folded many times inside the
sub-millimeter extra dimensions. The folding produces many connected parallel
branes or folds with identical microphysics - a Manyfold. Nearby matter on
other folds can be detected gravitationally as dark matter since the light it
emits takes a long time to reach us traveling around the fold. Hence dark
matter is microphysically identical to ordinary matter; it can dissipate and
clump possibly forming dark replicas of ordinary stars which are good MACHO
candidates. Its dissipation may lead to far more frequent occurrence of
gravitational collapse and consequently to a significant enhancement in
gravitational wave signals detectable by LIGO and LISA. Sterile neutrinos find
a natural home on the other folds. Since the folded brane is not a BPS state,
it gives a new geometric means for supersymmetry breaking in our world. It may
also offer novel approach for the resolution of the cosmological horizon
problem, although it still requires additional dynamics to solve the flatness
problem. Although there are constraints from BBN, structure formation, the
enormity of galactic halos and the absence of stars and globular clusters with
a discernible dark matter component, we show that the model is consistent with
current observational limits. It presents us with a new dark matter particle
and a new framework for the evolution of structure in our universe.
