David Kipping

And you get a number.

And then if you do that same experiment but locally, you actually measure the stars.

You measure the supernovae around us, these pulsating stars, and you actually measure how fast is stuff expanding, you get a different number.

They don't line up.

And so this is really weird.

So somehow something's wrong, right?

Either our measurements of the local universe must be wrong in some way, or this model that we're using to calculate the whole history of the universe, something is wrong with that model.

So this is a very famous...

Growing problem in cosmology.

It's now what we call a five sigma level.

So that means the chance of this being random is just like zero, essentially.

It's just this is a real effect.

And now we just have to figure out who's wrong.

Is it the observers or is it the theorists?

Yeah, I swing between both ways.

I'll talk to my cosmology colleagues, and depending on who I talk to, they'll convince me either way.

That's disturbing that people are convinced.

They're trying to push.

I mean, we all have biases, right?

Human beings.