London: A hidden universe could exist inside
every black hole, a Polish cosmologist has claimed, suggesting
that our own universe could be inside a black hole as well.
A black hole is a region of space from which nothing,
including light, can escape. It is called "black" because it
absorbs all the light that hits it, reflecting nothing, just
like a perfect black body in thermodynamics.
Using an adaptation of Einstein`s general theory of
relativity, Nikodem Poplawski, from the Indiana University in
Bloomington, analysed the theoretical motion of particles
entering a black hole.
He concluded that it was possible for a whole new universe
to exist inside every black hole, which means our own universe
could be inside a black hole as well, the Telegraph reported.
"May be the huge black holes at the centre of the Milky
Way and other galaxies are bridges to different universes," he
"If that is correct -- and it`s a big `if` -- there is
nothing to rule out our universe itself being inside a black
Explaining his theory in the journal `Physics Letters B`,
Poplawski said he used the Einstein-Cartan-Kibble-Sciama
(ECKS) theory of gravity in his analysis to account for the
angular momentum of particles in a black hole.
It has made it possible to calculate a quality of
space-time, called torsion, a property believed to repel
gravity, he said.
Instead of matter reaching infinite density in a black
hole called `singularities` in Einstein`s theory of
relativity, the behaviour of the space-time acts more like a
spring being compressed with matter rebounding and expanding
This "bounce-back" effect, the scientist explained, is
caused by the torsion of space-time having a repulsive force
against the gargantuan strength of gravity in a black hole.
He also claimed that "this recoiling effect could be what
has led to our expanding universe that we observe today and
could explain why our universe is flat, homogeneous and
isotropic without needing cosmic inflation".
"It is hard to see how we could test whether or not Dr
Poplawski`s theory is correct; the force of gravity in black
holes is such that nothing can escape, so no information about
what is going on inside one can ever reach us."
However, Poplawski said, if we were living a spinning
black hole then the spin would transfer to the space-time
inside, meaning the universe would have a preferred direction
-- something "we would be able to measure".
Such a preferred direction could be related to the
observed imbalance of matter and anti-matter in the universe
and could explain the oscillation of neutrinos, he added.