special relativity, implicitly if not explicity,
relies upon the relativistic effect of trying
to impose the "velocity" of light upon quanta
which are themselves relativisic internally,
viz angular momentum,
as developed by Dirac.

not that I comprehend his math;
it isn't really necessary to do that, since
the "twin paradox" and so on are merely quadratic exercises.

True that both are magic.

thus:
there's an old paper in *Nature*,
"Rapid collapse of the Eemian interglacial, *sensu strictu*,"
G. Woillard's study of a peatbog in France;
that was the interglacial before "this one,"
the Holocene, if it isn't already over.

of course, a lot of folks just use the term,
Pleistocene, and forget about it.

thus:
you don't get it (and neither do most Einsteinmaniacs)
that there is no absolute vacuum or "void,"
through which light is unable to refract, although
even such a putative void would conform to Snell's law,
its index of refraction being 1.0000.... like, wow,
that space is really flat; and, guess, What?
air's is, like, 1.00000004, because of the "curvature
of spacetime," y'think?

Blaise Pascal thought, y'know, and
he verified this by experiment.

there is tons of mainstream crappola about "zero point energy"
and the vacuum, because of this silly pretense
about an absolute void, which has no substance to it;
no-one has ever found or created one, and
it is strictly impossible.