This is really the first solution, but it's hypothetical and i haven't given guidelines to it. Ok now about this 4th dimension. Mainly because we can manipulate it's shortcutting effect over this universe. What i mean, is wormholes. The theory is open to debate, but then we might already have something similar in this universe, right at this moment.
Some people think that matter gets sucked through a black hole and then exits through a white hole.
What i believe black holes to be, are links from this dimension to a lower dimension. Perhaps the 1st or 2nd. Again, it's open to debate. It's like saying that you're driving a car forward, yet you want to go back.