This video promises "60 epic facts that show why the world is awesome" – and while it's presented by a veritable who's-who of geeky YouTube channel hosts, we'd be lying if we told you we weren't pretty skeptical at the outset. Seven minutes and thirty seconds later, we have to admit: that was pretty epic.
We've never seen it happen, but a collision with two black holes would be one of the most dramatic events in the entire universe, releasing so much energy that we could detect it clear across the cosmos.
Do you know what the hell is the Schwarzschild radius? I didn't have a clue, but now I know that if you compress Earth to an 8mm radius ball, you will get a black hole. My fascination didn't stop there.