Big Bang in 2D

This video at Big Think is an excellent description of the Big Bang. As much as I’ve read about it I’ve yet to come across a description this good and easy to understand. I’m trying it out on my family. Michelle Thaller does a fantastic job describing it. I’d previously heard it likened to a cinnamon roll expanding in an oven and I love cinnamon rolls so :nerd_face: But that description stops short of emphasizing, as she does in the video, the 2-D aspect, of only paying attention to the surface. New to my thinking.