Question: What's at the end/the bottom of a black hole?

Stuart Higgins answered on 13 Mar 2019:

Hmmm, I’m not sure, and I don’t know if anyone really knows. Black holes suck everything into them, including light (that’s why we call them black holes), and theoretical physicists debate a lot about what happens inside them. The problem is, if we sent a spacecraft in to take look (which would be very hard to do because the nearest black hole is very far away), then the spacecraft wouldn’t ever be able to radio home what it found, because even the radio waves would get sucked into the black hole too.