Brian Greene

And the distances of those planets from their host star varies over a wide range of possibilities.

That is progress.

That is understanding.

And then it frees you up to ask other kinds of questions, such as, what's the law of gravity?

What is the equation that allows us to understand how the sun forms?

So those are real questions.

And when you can toss out the ones that are red herrings that you thought were deep, but they're actually just asking the wrong question, that frees you up to make progress.

That would be pretty heavy and exciting to describe the underlying laws that govern all universes, regardless of their detailed features and what it would be like in that universe or that universe or that universe way over there.

We don't know very much observationally, sure.

We can't see them.

We don't know very much experimentally.

So they're definitely on a very different footing from that perspective.

emanating through the walls we might be able to listen in he says and take a couple of measurements which would be quite wonderful and in that case at least there's a chance that we'd get observational evidence of the existence of these other realms and at that point i would begin to say hmm maybe there's something really to this so the physics you're doing says i can't go there i can't observe it at least for the moment all i have is my brain and my math

The things that you were describing need not always be the case.

Really?

Yes.

What would be the case is that the fundamental governing equations, the mathematical laws, would be the underlying architecture that governs what happens in those places.

But environmental details can change things fairly dramatically.

Gravities and environmental details?

Yes.