  We present here a panoramic view of our unified, bi--scale theory of
gravitational and strong interactions [which is mathematically analogous to the
last version of N.Rosen's bi--metric theory; and yields physical results
similar to strong gravity's]. This theory, developed during the last 15 years,
is purely geometrical in nature, adopting the methods of General Relativity for
the description of hadron structure and strong interactions. In particular,
hadrons are associated with `` strong black--holes'', from the external point
of view, and with ``micro--universes'', from the internal point of view. Among
the results herein presented, let us mention the derivation: (i) of confinement
and (ii) asymptotic freedom for the hadron constituents; (iii) of the Yukawa
behaviour for the strong potential at the static limit; (iv) of the strong
coupling ``constant'', and (v) of mesonic mass spectra.
