Mucha na Dziko

so...if the bing bang started the universe (all started at one single point in time and space), and that universe is expanding from then on, that means that the Big Bang was a white hole. Right?

Now, we know (or rather assume) that the universe at one point will cease to expand and it will start to shrink/condense.

Does that mean that the universe started with a white hole, and then it will revert the process and the universe will become a black hole?


Now, from what I understand out of this StarTalk (



) is that a black hole (it's singularity) might be a wormhole – or maybe it is a wormhole, but one that we don't know how to use at the moment – that leads to a white hole (so the reverse of a black hole – everything comes out of it and nothing enters).

Wouldn't that mean that the universe started out of another universe?

No, wait, wouldn't that mean that a black hole is actually a wormhole to a universe that is yet to be (or is - according to that particular universe)?

No! Wait!

So...wouldn't that mean that if a spacecraft would enter a black hole (and survive the pressure) it would actually just time travel?
That the "different" universes or "different dimensions" (as in SF) would just be time traveling between the same spot in space, but trillions of years after the moment the astronauts/robots entered it?

If all or any of this would be true, then there would be no coming back from travelling through wormholes. You can only go in and see what's there. You can't come back, you can't send a message back to tell us what's on the other side. Because 1)The People on Earth would actually be long dead and 2)it's physically impossible to enter (go back through) a white hole.

And people say that being a miner is a dangerous job.

__________________