http://www.youtube.com/watch?v=ajhFNcUTJI0 Einstein and The Special Theory of Relativity: "Before Einstein was even born, physicists showed that the speed of light was one of those absolute things which can't be changed by a switcheroo. So any switcheroo we do has to keep light moving at the same speed..."
No physicist showed, both before and after Einstein was born, that the speed of light was constant - in Maxwell's theory, for instance, the speed of light varied with the speed of the observer. However, in accordance with Goebbels' principle, the century-long repetition of the lie has convinced everybody that Einstein's 1905 light postulate was fully justified. And since the speed of light is absolute, Divine Einstein, yes we all believe in relativity, relativity, relativity, time is relative in the following idiotic way:
http://www.bourbaphy.fr/damourtemps.pdf Thibault Damour: "The paradigm of the special relativistic upheaval of the usual concept of time is the twin paradox. Let us emphasize that this striking example of time dilation proves that time travel (towards the future) is possible. As a gedanken experiment (if we neglect practicalities such as the technology needed for reaching velocities comparable to the velocity of light, the cost of the fuel and the capacity of the traveller to sustain high accelerations), it shows that a sentient being can jump, "within a minute" (of his experienced time) arbitrarily far in the future, say sixty million years ahead, and see, and be part of, what (will) happen then on Earth. This is a clear way of realizing that the future "already exists" (as we can experience it "in a minute")."