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.

How does the concept of great circles relate to the movement of light in a spherical universe?

What illusion occurs when light travels along great circles in a spherical universe?

Discuss the implications of seeing an object that is diametrically opposite in a spherical universe.

How does the behavior of light in a spherical universe challenge our understanding of distance and size?