A:There are three possibilities: (1) Yes, via wormholes or changes in the physical state of this universe; (2) No, the easy one; (3) Yes, but not in
this universe in a differently structured one. 1. Accoring to Hawking, wormholes won't work; physical changes as this universe expands --- poosible but unproven. 2. The presently accepted answer based on both current relativity and quantum physics. 3. There is a growing body evidense to suggest that ours is but one of many "universes" each of which may have its own set or rules based on its initial conditions.
