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Old 03-04-2016, 02:19 PM
Asympotically fat Asympotically fat is online now
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Originally Posted by Peremensoe View Post
But not "before" us. Not a "previous" universe. Those are relative positions in time, which for us is bounded at the BB. It is as meaningless for us to speak of a universe "before" us as to speak of one "north" of us.
The cosmological singularity in big bang theory is an example of geodesic incompleteness, which is a pathology in the structure of spacetime. Now one way to interpret this is that the pathology in spacetime is a direct representation of reality, but it seems pretty natural to interpret the pathology as a breakdown of the theory too, in which case it seems fairly natural to assume we can extend time back beyond the big bang.