There is empirical evidence that it hasThat assumes that the speed of light
shalom b'SHEM Yah'shua HaMashiach Adonai
has always been the same as it is today.
slowed down on a steeply declining curve
and is now asymptotic.
Really!? Whoever has that evidence should make it public and start collecting Nobel Prizes. After all, such "empirical evidence" would overturn nearly every single aspect of modern physics, not to mention disproving Einstein's Relativity theories, which have been confirmed through nearly a century of experimental observation!