@OldGrumpy,
My level of research is beyond your scope, Grumpy.
I thrive on relativity.
I can offer you this.
What IS KNOWN - I know... Yet, I Know Nothing.
But, not for lack of endeavoring (Possibly 'endeavouring' don't care) to do so.
Did you know the Equator altered by 23 degrees, 12,900 yrs ago - Go figure.
And 'mate' - that's a 'control-mechanism', buddy:)