  Gravitational tunneling radiation (GTR) from a black hole is similar to
electric field emission of electrons from a metal. There is always a second
body to give the gravitational barrier of a black hole a finite rather than
infinite width so that a particle can escape by tunneling. Thus GTR may be
emitted from black holes in a process differing from that of Hawking radiation
(HR) with broad ranging astrophysical ramifications. HR of an "isolated" black
hole is an abstraction which has not been detected in three decades, and which
may not exist. GTR is beamed, in contrast to HR, which is isotropic. Little
black holes may account for much of the dark matter of the universe, and hence
the anomalous rotation of spiral galaxies, as well as contribute to the
accelerated expansion of the universe. The absence of HR permits the existence
of little black hole gravitationally bound atoms with quantized orbits and
quantized gravitational radiation. Since some theories speculate that the early
universe may have existed in n-dimensional space, certain results will be
presented both for general n-space and for the 3-space in which we live. An
inconsistency between quantum mechanics and the equivalence principle is
demonstrated. It is shown that angular momentum cannot be quantized in the
usual manner in 4-space, with possible consequences for Kaluza-Klein theory. An
hypothesis is presented for reducing the enormously too-large vacuum zero-point
energy. String theory may be impacted by the finding that atoms are not
energetically stable in higher than 3-space. GTR avoids the black hole lost
information paradox.
