From Galileo to Einstein to Hubble, scientists have long grappled with the shape and scale of the Universe. As technology expands our view, missing space curvatures and inconsistent data related to Hubble's constant keeps us mystified. Is the universe flat, infinite, or bubble-shaped? How can the observable Universe be expanding but also homogenous? How do we explain the Big Bang if time itself is infinite? And do the answers to our questions live at the subatomic level?