The Fluid Dynamics of Spacetime
The unification of the two great theories of the 20th Century - Quantum Mechanic (QM) and General Relativity (GR) - still seems far away.
I think both theories will require major modification before they can be united.
The modification will be in how they treat spacetime.
In QM spacetime is a stage on which the action occurs. In GR spacetime is the action!
That's a massive difference.
Think of a fluid - at the macro level an excellent description is fluid dynamics - the Navier-Stokes Equations. But at the micro level molecules rule.
So, the EFE (Einstein Field Equations of General Relativity) are the "Navier-Stokes Equations" of spacetime - an excellent description at the macro level.
But at the micro level of spacetime we have what? Nobody knows. Our theories are not there yet.
Content written and posted by Ken Abbott firstname.lastname@example.org