These are highly qualified mathematicians in universities answering these questions. They know quite a lot, but you can see them struggle to answer certain questions due to the limits of human knowledge of black holes, one of the weirdest objects in the universe. The weirdest? There's just so much we don't know about them due to the mysteries of that singularity.
If everyone in this Sixty Symbols video including the presenter, Brady Haran, seem a bit familiar, it's because they're all the same people who appear in Numberphile. Two great channels, I recommend subscribing to both. It doesn't get much nerdier than this.
If everyone in this Sixty Symbols video including the presenter, Brady Haran, seem a bit familiar, it's because they're all the same people who appear in Numberphile. Two great channels, I recommend subscribing to both. It doesn't get much nerdier than this.