Hypersphere

This is a 3D representation of a 4D Sphere. The outside is like a normal sphere. The inside represents travelling into the 4th dimension. If we were observing it from 4D space then the oblongs in the middle would be perfect circles.
This is a 3D representation of a 4D Sphere. The outside is like a normal sphere. The inside represents travelling into the 4th dimension. If we were observing it from 4D space then the oblongs in the middle would be perfect circles.