Adam Brown

in which we transitioned far, far in the past, maybe into what's called a bubble universe.

So we started off in some other much higher vacuum long in the past.

And then what we see as the Big Bang was in fact just a sort of local

Vacuum decay that then gave rise to the bubble in which we live, everything we see around us.

Who would be in a position to seed these bubbles?

Usually people are thinking that something just spontaneously happens, you know, like in the same way that rain spontaneously happens in a cloud, that somebody didn't go and seed it deliberately to make it happen.

But you could more than free to speculate that somebody seeded it to make it happen as well.

How does this respect the conservation of energy or the conservation of matter?

Energy is not conserved.

In general relativity.

Energy is not conserved.

It's conserved locally at things you can do at a local level, but in an expanding universe, energy is not conserved globally.

This is one of the big surprises.

That is not a speculative statement.

That is a statement that goes all the way back to Einstein and general relativity, is energy is simply not conserved at the global level.

It's conserved at the local level.

You can't do something in your lab that will...

generate free energy.

But if you can participate in the expansion of the entire universe, then energy is not conserved.

Energy is conserved in a universe that's not expanding.