What is infinity? That is a very large, broad question that many mathematicians struggle to understand. Infinity is a hard, dare I say impossible, subject because frankly, imagining and visualizing infinity is impossible. It’s as impossible to comprehend as it is to imagine absolutely nothing, because we have not and may never be able to experience absolute nothing in concrete form. Like nothing, you can theoretically play with infinity, but in doing so, mathematicians stumble across problems with our basic understanding of the concept, and paradoxes pop up constantly. If you have an infinity of something, say an infinite tube of cardboard in a finite room, how can that tube exist within the room? It would run out of space! In the video above, four scenarios are addressed in which infinity appears to run into difficulties in our finite understanding of the infinite. Fascinating stuff. Enjoy!