  It is shown, using the Einstein-Cartan-Sciama-Kibble theory of gravity, that
gravitational collapse of spin-fluid fermionic matter with a stiff equation of
state in a black hole of mass $M$ forms a new universe of mass $\sim M_\ast=M^2
m_n/m_\textrm{Pl}^2$, where $m_n$ is the mass of a neutron. Equaling $M_\ast$
to the mass of the Universe, which is about $10^{26}$ solar masses, gives
$M\sim 10^3$ solar masses. Our Universe may thus have originated from the
interior of an intermediate-mass black hole.
