Sophomorism:
So I'm trying to imagine a black hole, a singularity, and it's not an infinitely dense sphere with gravity so great that not even light can escape. The event horizon is not the edge of a sphere, the crossing of which might be entry into a wormhole through space-time.

Instead, I read an NYT article, ". . .matter, say in a dead star, could collapse into a heap so dense that light could not even escape from it, eventually squeezing itself out of existence. At the center, space would be infinitely curved . . . Space, time and even the laws of physics themselves would break down at this cosmic dead end, called a singularity."

It squeezes itself out of existence, so no it's not a sphere. A sphere in my mind exists. So the singularity is an infinitely dense point of non-existence. But then my mind goes on a tangent about the Big Bang and the point in which all the matter that now comprises our universe was contained. Since it contained the amount of matter necessary to create numerous black holes within our universe, it certainly contained enough mass to squeeze itself out of existence.

So in linear pedestrian thinking, it seems that the point out of which sprung the Big Bang was non-existent, or a perhaps a black hole of inconceivable density (when something is that dense, does the degree matter anymore?). What caused that infinitely dense point to "bang", and what if a black hole in our observable universe "bangs"? Could it create a universe? Would the universe it creates inflate and expand like ours, according to latest knowledge, did and is doing? Maybe it's created on the "other side" of the black hole.

The singularity is not a sphere. It is infinitely curved space and non-existence is somewhere in the equation. It is positive, proactive non-existence in this universe, a concept that is rendered inconceivable by the very fact that we exist.

I wonder where I can get lasagna for lunch. (Greek choir nods in approval).