Vivi22 said:

I certainly can't claim to have the answers to these questions, but I'm not sure our experiences with a 3D universe are particularly comparable to what would happen in a 4D universe. It's something we truly would have no intuitive understanding of, and may not even be subject to the same sort of physical laws our universe is (hell, it almost certainly wouldn't be).

Well, this is presuming our universe really is just three spatial dimensions. But regardless, even

*if* the rules for a four dimensional universe were different than our own, that we are linked to that space would imply that forces there would have some influence here; even if their outcomes were dramatically different.

I haven't yet had a chance to look deeper into their hypothesis, so perhaps they cover it.

albino boo said:

1. Our universe came from the same place that is always did, a singularity. The big bang remains the moment when that singularity went from the infantile to the finite of our universe.

This assumes our universe is finite. An assumption no more or less valid than assuming it's infinite. We just don't know. (yet)

But regardless, I repeat the question. Where did the vast amount of matter and energy within our universe come from? Based on the hypothesis, our universe was created by a fourth dimensional star going nova and collapsing into a black hole. So either that was one

*hell* a massive star, the nova somehow "created" an incredible amount of three dimensional matter, or the nova converted fourth dimensional matter into three dimensional matter. If we presume the latter, than we're left wondering, "What exactly is the intrinsic conversion rate for fourth dimensional matter to three dimensional matter?

2 and 3. Four dimensional matter does not enter our universe, the event horizon for four dimensional matter marks the point when everything goes infinite and falls into the four dimensional singularity. Its frame of reference is different to ours and wouldn't be affected by our universes time. If you are outside of time you cannot interact because interaction takes time.

Not necessarily. Perhaps within our own universe yes, given that our universe is so intrinsically tied to time, but we can't assume interaction can't happen outside of time.

Also, even if we can't see any

*direct* influence or interaction from the fourth dimensional space, that we're effectively tied to that space, being that we're the direct result of the four dimensional black hole, we should still see

*some* level of influence. Even if that influence manifests in some unexpected way.

Basically a 4 dimensional singularity has created a separate 3 dimensional finite space in its event horizon. When 4 dimensional matter enters the event horizon time stops so it can't interact with 3 dimensional space.

But this presumes that our universe is finite. And as I pointed out above, there's no substantial evidence to assume this, or the opposite, are true.

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I think this is the crux of my trepidation. This hypothesis, while extraordinarily intriguing, seems to assume a lot of parameters in order for it to function.

Still, like I'd said above, I've yet to look deeper into the hypothesis and the teams work. Perhaps further reading will answer some of my questions.