A fun fact about black holes that isn't often mentioned is that a black hole has two singularities. One is in the center — the one people always talk about — an

A fun fact about black holes that isn't often mentioned is that a black hole has two singularities. One is in the center — the one people always talk about — and the other one is at the event horizon. My impression is that the second one is eliminated by choosing to represent the calculations with a coordinate system to eliminates it at the geometrical level, but it's unclear if this is a "hack" or not. But I find it interesting (as a layman) that one can be handwaved away as irrelevant, while the other cannot.