Does our universe exist within the black hole in another 4 dimensional universe?

There was a thread about the universe and it's creation yesterday that was anchored (I think due to the title) but raised an interesting topic, the Big Bang, singularities, and the creation of the universe.

One of the more interesting theories out there on this revolves around the singularity and the fact that there are only two places in the history of the universe where such a thing exists, the Big Bang and inside Black Holes.

An article here on Nature describes it: LINK

Using math and physics way beyond anything I'll be able to comprehend they've come up with the theory that inside the singularity of a Black Hole (assumedly every Black Hole even) is a separate two-dimensional universe (see the Holographic Principle) and conversely our own three dimensional universe (excluding time as a dimension, just talking spacial) exists inside the singularity at the center of a Black Hole located inside a four dimensional universe.

Theoretically a star existing the four dimensional universe could have went supernovae, collapsed into a black hole, and that's what spawned our own universe. If looking at images such as Hubble's Deep Field made you feel insignificant before, just think that our own universe could be only one of billions located inside Black Holes across a four dimensional universe, and there's no telling how far that chain goes (5, 6, infinity?).