Like part of a cosmic
Russian doll, our universe may be perfectly nested inside a black hole that is
itself part of a larger universe. In turn, all the black holes found so far in
our universe—from the microscopic to the supermassive—may be ultimate doorways
into alternate realities.
According to a mind-bending
new theory, a black hole is actually a tunnel between universes—a type of
wormhole. The matter the black hole attracts doesn’t collapse into a single
point, as has been predicted, but rather gushes out a “white hole” at the other
end of the black one, the theory goes.
In a paper published in the
journal Physics Letters B, Indiana University physicist Nikodem Poplawski
presents new mathematical models of the spiraling motion of matter falling into
a black hole. His equations suggest such wormholes are viable alternatives to
the “space-time singularities” that Albert Einstein predicted to be at the
centers of black holes.
According to Einstein’s
equations for general relativity, singularities are created whenever matter in
a given region gets too dense, as would happen at the ultra-dense heart of a
Einstein’s theory suggests
singularities take up no space, are infinitely dense, and are infinitely hot—a
concept supported by numerous lines of indirect evidence but still so
outlandish that many scientists find it hard to accept. If Poplawski is
correct, they may no longer have to.
According to the new
equations, the matter black holes absorb and seemingly destroy is actually
expelled and becomes the building blocks for galaxies, stars, and planets in
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