  If space, time and mass-energy expand outward from the Big Bang along the
time axis equally in the (+) and (-) directions, then time is symmetric by
Weyl's definition. In the Feynman-Stueckelberg Interpretation, antimatter is
identical to matter but moves backward in time. This paper argues this
interpretation is physically real, leading to the universe containing dark
matter with mass accumulations similar to ordinary matte. As time expands, in
both directions away from the origin, quantum uncertainty allows a brief,
decreasing leakage of mass between (+) and (-) universes. Matter leaking from
(-) to (+) time moves forward in time, producing preponderance of matter in (+)
time. Antimatter leakage from (+) time to (-) time in the same way produces
antimatter preponderance in the (-) time universe. The remaining opposite
partner particles left by the leakage, (antimatter and matter respectively)
proceeding outward in antitime and time respectively, after many annihilations
also increase the two preponderances in the two universes. The anti-universe
should be observable by gravitational lensing, predicting "MACHOS" of
approximately stellar mass, and multiple micro-lensing of quasars.
Non-existence of primordial antimatter of Z>1, and a large variation in the
quantities of dark matter associated with different individual galaxies are
predicted. A symmetry is provided for Nodland and Ralston's observed maximum
axis of rotation of polarization of galactic synchrotron radiation. A new
solution of the horizon problem at times close to the origin is indicated.
Collapse of the wave function and time's arrow are explained and non-locality
and instantaneity of quantum interaction required. Extension of the hypothesis
to six dimensions gives an 83.3% dark matter share of the universe.
