Robert Krulwich

So if I told you that you could write anything down, and it might be a universe, black universes, white universes, green universes, soft universes, hard universes, muscular universes, teeny universes, huge universes, then the only one you know intimately is your own.

It seems to me that what do you know about those other universes, other than that they might be very different?

But Brian believes that one day we might be able to experimentally detect these other universes and somehow, you know, kind of pick up their distant vibrations, kind of like the way you hear your neighbor's music.

It's just...

And I say from my brain, I'm going to just assume certain things are always true.

There's always going to be gravity, say.

There's always going to be some particle or wave that creates matter.

There's always going to be, I don't know, what else?

Are there things that they're always going to be?

What are they that are always going to be?

Or why...

Was the world made in seven days?

Aren't we getting close to some sort of... You're believing in certain things to be always true the way religious people believe certain things are always true.

Not because you've seen it, it's just because you have a faith in it.

has to be there.

Oh, this is- Not belief, just logic.

This is just logic.

Aren't you worried, though, that there's another Brian Greene in universe number 3,790,208,645 who is sitting there talking to another radio reporter in another university and he's saying, well, we know all about the other universes because we're assuming...

that the math here is the same as the math there in that other place.

But as it turns out, their math and our math aren't the same, so they will not... You may just be wrong.