So because I can only really think of space-time in 2-dimensions like a sheet of something, my assumptions might be wrong to begin with. I was watching a YouTube video on black-holes and there was a quip regarding black holes and their warping of space time, to the point where the narrator said something along the lines of *“there is nothing at the center of the black hole but gravity has warped space time so much that it's this ’pinhole’ like affect that causes the blackhole behavior”*.

My questions are:

1. When a star dies and collapses into a black hole, what is at the center? The star's mass compacted into the size of the plank length, or something similarly small? **Is there really nothing at the center of a black hole? Surely, the core collapsed into something, just really small right?**
2. What is a singularity? Is it just the warping of space time that makes it this way?