Question: What’s at the bottom of a black hole?

Sophia Pells answered on 12 Mar 2019:

Physics equations predict that at the very centre of a black hole is something called a singularity. A singularity is a point that is infinitely heavy and infinitely small. As material falls into a black hole it becomes more and more crushed until it gets as heavy and as small as possible. No one is really sure if this is the case in real life though. There is still no way to explain gravitational fields with quantum mechanics which would be needed for us to properly understand what the centre of a black hole is like.