I read somewhere that the roots of SR can be traced back to Einstein's childhood. I wish I could remember where I read it, but I can't. (for some reason I am leaning towards "The Universe in a Nutshell") It said that when he was a boy (11 years old, I believe) he went to the beach with his mother. If he would run along at the same speed as the waves, he noticed that they appeared to stand still. This observation is what he attributes to his eventual discovery of Relativity. Does anyone know if there is any truth to this? Any more details, maybe? *crosses fingers* A source, perhaps?