Does your “ spatial medium ” notion explain the engine of life,
Old Coot ?

Q. What drives the engine of life ?
A. It's the cosmos forever approching equalibrium,
but never getting there.

Nothing spews more than a “ black hole ”;
more likely than not, the entire Milky Way is its spew.
Like the CMB, the Milky Way dates back at least 13.7 giga years.

Even neutron stars spew more than stars like our sun.
Our tiny sun spews 5 mega tons per second, mostly photons.
As the cosmos cools, life evolves with it.