Black Holes are where God divided by zero, so the saying goes.
In the Beginning
The big bang really happened, despite claims in the popular press.
Pointed Debate
There is still much debate about black hole singularities, even though it’s pretty clear black holes exist.
Non-Singular Black Holes
The basic model of a black hole can be summed up as follows: gravity wins. The root cause of all black holes—be they tiny primordial black holes, solar mass black holes, or supermassive galactic black holes—is gravity. Squeeze enough mass into a small enough volume and gravity does the rest.