Originally Posted by dcl

dcl: I agree. I suggest you look at the lead string in my thread, entitled "The Shape of the Universe", where I argue that the Universe is a four-dimensional hypersphere of which its three-dimensional "surface" is the Universe that we know. Its surface is curved, and its center is in a direction that we cannot point. I offered as what I believe to be a more plausible description of the shape of the Universe than the doughnut-shaped thing that Dr. Gay described in her podcast with the same title. The lecturer at a lecture on Big Bang cosmology that I attended told me that he was familiar with this model and regarded it as plausible.