"Relativity was born of an epistemological shock; it was born of the "failure" of the Michelson experiment. ...Is so little required to "shake" the universe of spatiality? Can a single experiment... annihilate... two or three centuries of rational thought? Yes, a single decimal sufficed, as our poet Henri de Regnier would say, to "make all nature sing." ...The Michelson experiment, at first so particular in character, will form the basis of the most far-reaching generalization."