Sean Carroll

Right.

Yeah, look, I'll be super honest, and my honest answer is I don't know.

That sounds like a research program.

Rachel should write a paper about this and submit it to the physical review.

I doubt it is the slightly longer answer because if the universe is rotating, then that tends to break the isotropy of the universe.

Okay, God bless you for that.

I'm going to fill you in.

Isotropy just means things look the same in every direction.

That's right.

So there's not like a big hot spot in one side of the universe and cold spot in the other side.

It's more or less the same average everywhere with little fluctuations around it.

And we have that right now.

That's exactly what we have.

And so once you start messing with that, can you mess with it like just a little bit and maybe no one has noticed yet?

Sure.

You absolutely always can.

But it's hard to do that.

And the theory that we have for dark energy with Einstein's cosmological constant.

just does a really good job at fitting the data in a sort of a simple, direct, blatant kind of, here I go kind of way.

So I'm absolutely open to creative new things like the rotation of the universe, but where would that come from?