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

Rose Turner answered on 12 Jun 2017:

The ‘other side’ of a black hole is called the ‘event horizon’. It’s like a boundary that if you get near enough, you would be pulled in by its gravitational force (like tipping over a waterfall). Einstein’s theory suggests that a black hole gets smaller and smaller and smaller the further in you go, until it is a spot that’s infinitely small and infinitely dense. This is hard to imagine, and is only a theory – nobody knows exactly what’s at the bottom of a black hole, because if we went into one we’d never be able to come out to tell anyone about it! Luckily, there aren’t any near us in the universe!