  We investigate the potential impact of mass inflation inside black holes on
the dynamics of the Universe, considering a recent reformulation of general
relativity, proposed in [1], which prevents the vacuum energy from acting as a
gravitational source. The interior dynamics of accreting black holes is
studied, at the classical level, using the homogeneous approximation and taking
charge as a surrogate for angular momentum. We show that, depending on the
accreting fluid properties, mass inflation inside black holes could influence
the value of the cosmological constant and thus the dynamics of the Universe. A
full assessment of the cosmological role played by black holes will require a
deeper understanding of the extremely energetic regimes expected inside real
astrophysical black holes, including their relation with the physics of the
very early Universe, and may eventually lead to an entirely new paradigm for
the origin and evolution of the Universe.
