http://www.berkeleyscience.com/relativity.htm "The conclusion of the Michelson-Morley experiment was that the speed of light was a constant c in any inertial frame. Why is this result so surprising? First, it invalidates the Galilean coordinate transformation. Note that with the frames as defined in the previous section, if light is travelling in the x' direction in frame O' with velocity c, then its speed in the O frame is, by the Galilean transform, c+v, not c as measured. This invalidates two thousand years of understanding of the nature of time and space. The only comparable discovery is the discovery that the earth isn't flat! The Michelson Morley experiment has inevitably brought about a profound change in our understanding of the world."
http://www.amazon.com/Faster-Than-Speed-Light-Speculation/dp/0738205257 Faster Than the Speed of Light, Joao Magueijo: "A missile fired from a plane moves faster than one fired from the ground because the plane's speed adds to the missile's speed. If I throw something forward on a moving train, its speed with respect to the platform is the speed of that object plus that of the train. You might think that the same should happen to light: Light flashed from a train should travel faster. However, what the Michelson-Morley experiments showed was that this was not the case: Light always moves stubbornly at the same speed. This means that if I take a light ray and ask several observers moving with respect to each other to measure the speed of this light ray, they will all agree on the same apparent speed!"
http://www.amazon.com/Curious-History-Relativity-Einsteins-Gravity/dp/product-description/0691118655 The Curious History of Relativity: How Einstein's Theory of Gravity Was Lost and Found Again, Jean Eisenstaedt, pp. 17-19: "If, as Michelson's experiments showed, this theorem of the addition of speeds is not valid, in particular for light, then something is not right with our initial assumptions. (...) The most convincing solution physicists will find will be special relativity. Not much will remain of our initial hypotheses: neither Newton's absolute time nor the definition of speed will survive. But, above all, in this new kinematics a new physical constant will appear, c. It will no longer be possible to add two speeds without the intervention of c. No kinematics will be possible without c; no physics will be possible without c."
http://www.phys.unsw.edu.au/einsteinlight/jw/module3_weird_logic.htm Professor Joe Wolfe: "At this stage, many of my students say things like "The invariance of the speed of light among observers is impossible" or "I can't understand it". Well, it's not impossible. It's even more than possible, it is true. This is something that has been extensively measured, and many refinements to the Michelson and Morely experiment, and complementary experiments have confirmed this invariance to very great precision. As to understanding it, there isn't really much to understand. However surprising and weird it may be, it is the case. It's the law in our universe. The fact of the invariance of c doesn't take much understanding: what requires understanding are its consequences, and how it can be integrated into what we already know."
http://www.time.com/time/magazine/article/0,9171,993018,00.html Stephen Hawking: "So if you were traveling in the same direction as the light, you would expect that its speed would appear to be lower, and if you were traveling in the opposite direction to the light, that its speed would appear to be higher. Yet a series of experiments failed to find any evidence for differences in speed due to motion through the ether. The most careful and accurate of these experiments was carried out by Albert Michelson and Edward Morley at the Case Institute in Cleveland, Ohio, in 1887......It was as if light always traveled at the same speed relative to you, no matter how you were moving."
http://www.elisabrune.com/pdf/Jumeaux.pdf Jean-Pierre Luminet: "La vitesse de la lumière dans le vide est la même pour tous les observateurs, quel que soit leur état de mouvement - il s'agit d'un principe dont Einstein est parti pour construire sa théorie, et d'un fait observé dans les célèbres expériences de Michelson et Morley."