This is what a universe with spherical geometry might look like (even if you're sober)

The video explores the concept of spherical universes, focusing on the 3-sphere model. It explains how light behaves in such a universe, affecting perception and size appearance of objects. The video uses a flatland analogy to illustrate these concepts, showing how light travels along great circles in a spherical universe. It also discusses the implications of these observations for understanding the shape of our universe.

What new insight or understanding did you gain from this video?