Einsteiniana's fundamental absurdities - time dilation and length
contraction - are deducible from the single assumption that the speed
of light is independent of the speed of the light source. See pp.
12-16 in Chapter 11 in:

http://www.people.fas.harvard.edu/~djmorin/book.html
Introduction to Classical Mechanics With Problems and Solutions
David Morin, Cambridge University Press

So the hysteria around any faster-than-light travel established in
experiment or theory would be a red herring (that is, Einsteiniana
would continue to destroy human rationality) unless the assumption of
independence is refuted. Fortunately the Michelson-Morley and Pound-
Rebka experiments have UNEQUIVOCALLY shown that the variation of the
speed of photons is identical to the variation of the speed of any
material bodies, e.g. cannonballs.

Pentcho Valev