04 Dec 23
https://phys.org/news/2023-12-theory-einstein-gravity-quantum-mechanics.html
The gist of that theory says if spacetime is not quantized, but classical then this theory can glue the two ideas of physics together.
Experimental evidence can come in by measuring small changes in the mass of an object, say a 1kg test weight, would show tiny changes periodically and if not, back to the drawing boards......